logo
Welcome Guest! To enable all features please Giriş or Kayıt.

Bildirim

Icon
Error

6 Sayfalar«<3456>
Ayarlar
Son mesaja git Go to first unread
Offline CLM  
#81 Gönderildi : 28 Aralık 2021 Salı 04:43:44(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Therefore, it is of practical significance to explore and seek an effective pretreatment method.activated carbon for gold recovery
In this paper, Fenton oxidation and activated carbon adsorption were combined to pretreat the wastewater from natural gas purification maintenance, in order to improve the subsequent operation efficiency of UASB.
This experiment by orthogonal test to determine the Fenton reagent oxidation first preliminary operating conditions, on this basis, carries on the single factor analysis method, the main factors influencing the Fenton reagent treatment effect for each study, investigation of its influence on wastewater COD removal rate, the results show that Fenton oxidation method the optimum operating conditions for natural gas purification overhaul wastewater treatment: HO2 dosing quantity 0.3 mol/L, n (HO)/n (Fe) = systematically, initial pH = 3, reaction temperature 70 ℃, reaction time, 40 min.
Under these conditions, the COD removal rate reached 78.6%, the BOD /COD value increased from 0.168 to 0.353-0.403, and the biodegradability was greatly improved.
If Ho is added in three times and the interval time is 10min, the COD removal rate will increase from 78.6% to 80.3%. Therefore, it can be seen that H0: batch addition will further improve the reaction effect.
After Fenton oxidation treatment, wastewater and activated carbon adsorption, this topic activated carbon adsorption experiments using single factor method, examines different PH, activated carbon adsorption dosing quantity and the influence of adsorption time of wastewater COD removal rate, the results show that after Fenton oxidation treatment without having to adjust PH value, according to the 20 g/L after adding the activated carbon reaction 3 h at room temperature, COD removal rate was 47.3%,, BOD/COD value of 0.438 to 0.625.activated carbon wholesale
The research in this paper has laid a theoretical foundation and provided an experimental basis for the practical application of Fenton oxidation and activated carbon adsorption in the pretreatment of natural gas purification maintenance wastewater in UASB reactor. activated carbon for gold recovery
Offline CLM  
#82 Gönderildi : 29 Aralık 2021 Çarşamba 03:42:48(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Its adsorption performance mainly depends on several main material parameters and process parameters on it [8. Material parameters including carbon adsorption porosity, thickness of honeycomb structure and the content of carbon; process parameters including fluid flow rate and concentration of the adsorption properties of adsorption, can adsorption depends on the carbon structure and adsorption properties of features such as molecular weight). The curve is one of the main performance characterization of adsorption, adsorption is the adsorbate concentration ratio before and after the change over time of a function [9 '. This ratio is 0.95, the amount of adsorption properties of adsorption is called penetration capacity. Penetration capacity depending on the fluid flow rate, the concentration of the adsorbate and honeycomb carbon component content
Factors such as [10. For honeycomb activated carbon, the wall thickness is a very important parameter, by changing the wall thickness to improve its adsorption efficiency. Under the same porosity, thickness increases, the honeycomb carbon content per unit volume also will increase, which can improve the adsorption capacity. This is because the wall thickness increases, the fluid channel in the cellular cross-sectional area reduced, so the real surface or volume flow rate will increase. At the same time, the contact between adsorbate and carbon efficiency will, there is a balance between the two. Under the given conditions, the balance will determine adsorption increase or decrease. If the adsorbate at higher the diffusion rate diffuses to the inside of the honeycomb wall, and the empty adsorption site can be continuously adsorbed, so the thick-walled honeycomb should have better adsorption efficiency and adsorption capacity"Determination of air velocity and cross-sectional area of empty towerThe empty tower gas velocity is the velocity of gas passing through the entire cross section of the adsorber.The selection of air velocity not only directly determines the size and pressure drop of the adsorber, but also affects the adsorption efficiency.
If the gas speed is very small, the size of the adsorber is large and uneconomical.activated carbon gold mining
If the gas velocity is too large, the pressure drop will increase and the adsorption efficiency will be affected.The optimum gas velocity was determined by experiment.
The adsorption design can not pursue too high adsorption efficiency, the empty tower speed value is reduced, it will make the adsorption bed volume, the amount of adsorbent and equipment cost increased greatly;On the contrary, it is not appropriate to take too large empty tower gas speed. Although the equipment cost is low, the adsorption efficiency drops a lot, and the pressure drop of the system will rise rapidly with the increase of the empty tower speed, resulting in excessive power consumption. Therefore, due to the selection of the appropriate air speed of the empty tower, the most suitable air speed of the empty tower is 0.8~1.2m/s"21, according to the empirical conclusion, this design determinesactivated carbon company
Offline CLM  
#83 Gönderildi : 29 Aralık 2021 Çarşamba 03:48:03(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Organic waste gas comes from a variety of sources, and its generation and emission methods are not the same.Therefore, the treatment technology of organic waste gas is also varied, and each treatment technology also has its own different advantages and disadvantages.activated carbon wholesale
In the actual production process, according to different conditions, the choice of appropriate methods is the key to organic waste gas treatment.
The treatment of organic waste gas mainly includes two categories: recovery method and elimination method.The main recovery technologies of organic waste gas include: adsorption method, absorption method, condensation method, membrane separation technology and pressure swing adsorption technology.Organic waste gas elimination technology can be divided into two categories: physical - chemical method and biological method.
Physical - chemical methods include thermal destruction, photodecomposition, corona, ozone decomposition, etc.Biological methods include biological filter, biological drip filter, biological scour tower, membrane bioreactor, activated sludge process, etc.The purification rate of activated carbon adsorption method can reach more than 95%, if there is no regeneration device, the operation cost is too high, if the steam recovery, the process is too long, the operation cost is high, the recovery of solvent and water mixture utilization value is not high;Regeneration needs a stable steam source, and the adsorption capacity of activated carbon after repeated adsorption and desorption will gradually reduce, generally use two or three years after the replacement.The purification rate of liquid absorption method is only 60%-80%, and there are secondary pollution problems.activated carbon for gold recovery
The purification rate of catalytic combustion method can reach 95%, but it is suitable for the treatment of high concentration, small air volume and high exhaust gas temperature of organic waste gas, and the gas temperature is higher, in order to improve the exhaust gas temperature, it needs to consume a lot of energy.The most used method is a catalytic combustion method, adsorption, it mainly particles or honeycomb carbon as adsorbent, to ensure the continuity of production, generally set up two adsorption bed used interchangeably, as a result of the switching cycle at least for ld, so adsorption bed volume big, adsorbent dosage, heavy equipment, large investment, operation trouble;As the bed volume is large, it is easy to appear the combustion and explosion caused by the accumulation of adsorption heat.To solve these problems, the adsorber of the existing new device adopts a multi-unit shunt combination structure, and uses a new material -- activated carbon fiber as adsorbent
Offline CLM  
#84 Gönderildi : 29 Aralık 2021 Çarşamba 03:52:27(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Activated carbon, especially activated carbon with high specific surface area, has developed microporous structure and large adsorption capacity, so it has great application potential in fuel gas storage, gas separation, catalytic reaction and other aspects.
In recent years, the demand for activated carbon with high specific surface area and specific pore structure is increasing.
Petroleum coke, the by-product of oil refinery, is rich in resources, low in price, high in carbon content, low in ash and volatile, and is a high quality raw material for producing medium and high grade carbon.But because petroleum coke is easy graphitization carbon, compact structure, high crystallinity, lack of activation required by the primary hole, need to use a large number of strong alkali to activate the hole, resulting in high production cost, serious pollution.activated carbon for gold recovery
Therefore, optimizing the process conditions, reducing the amount of alkali and controlling the micropore structure are the key to the development of petroleum coke based activated carbon with high specific surface area on the basis of activation mechanism.
Based on this, this paper focuses on the following aspects of exploration and research:
Activated carbon was prepared by using Liaohua petroleum coke as raw material and KOH as activator. The effects of alkali-coke mixing mode, particle size of raw material, carrier gas flow rate, different chlorophyll immersion, drying and heating rate on the properties of activated carbon were investigated.The experimental results show that Liaohua petroleum coke is a high quality raw material for the preparation of activated carbon with high specific surface area. The mixing mode of alkali coke, the particle size of raw material and the velocity of activated gas all affect the performance of the product.The specific surface area of activated carbon was obtained in the following order: water ~ glacial acetic acid >, ethanol >, methanol ~ tetrahydroaromatic >, ethylene glycol >, 30% hydrogen peroxide, which indicated that the removal of potassium compounds in activated carbon particles had a great influence on the formation of activated carbon pores and the adsorption performance.The microcrystalline structure and surface properties of the raw materials were changed by pre-carbonization, and the effect of these changes on the properties of the activated products was emphatically investigated.
At higher pre-carbonization temperature, with the increase of pre-carbonization temperature, the content of hydrogen and oxygen in petroleum coke decreases sharply, the content of surface functional groups also decreases, and the microcrystalline structure becomes more stable. As a result, activation is difficult, which leads to the reduction of specific surface area of activated carbon and the change of pore size distribution.
The mesopore content iactivated carbon wholesalencreased relatively.
The specific surface area of activated carbon prepared by untreated petroleum coke plus three times the mass of alkali activation is 1997m2g, while the specific surface area of activated carbon prepared by petroleum coke carbonized at 1200℃ under the same activation condition is only 12m2g1.However, the heat treatment of petroleum coke at lower temperature has little effect on the specific surface area of the activated carbon prepared, but increases the DOO of graphite microcrystals in the raw material.
Offline CLM  
#85 Gönderildi : 30 Aralık 2021 Perşembe 08:23:12(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Laboratory studies have shown that ceramic honeycomb activated carbon catalytic ozone oxidation technology and removal of trace organic matter in water has more obvious advantages, but the catalytic oxidation and active carbon process characteristics to be in-depth study, therefore the pilot was investigated through honeycomb ceramic catalytic ozonation and activated carbon catalytic ozonation and activated carbon filter combination process operation characteristics.activated carbon for gold recovery
Under experimental conditions, the gas-liquid mass transfer capacity of honeycomb ceramic catalytic reactor is slightly lower than that of ozone reactor, but when the gas-water ratio is greater than 0.15, the gas-liquid mass transfer capacity exceeds that of ozone reactor. The gas holdup (Eg) of ozone reactor and honeycomb ceramic catalytic oxidation reactor is 0.19% and 0.15% respectively when the gas volume is 0.L m3/h, indicating that the size of bubbles in the catalytic oxidation reactor is large, which is not conducive to gas-liquid mass transfer. The Pe values of ozone reactor and honeycomb ceramic catalytic reactor were 3.14 and 5.25, respectively, in the liquid pulse addition test, indicating that the liquid level pushing flow component in catalytic oxidation reactor is higher, which is conducive to gas-liquid mass transfer. The gas-liquid mass transfer efficiency of catalytic oxidation reactor is more affected by increasing gas-water ratio.activated carbon wholesale
Offline CLM  
#86 Gönderildi : 30 Aralık 2021 Perşembe 08:30:25(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Laboratory studies have shown that ceramic honeycomb activated carbon catalytic ozone oxidation technology and removal of trace organic matter in water has more obvious advantages, but the catalytic oxidation and active carbon process characteristics to be in-depth study, therefore the pilot was investigated through honeycomb ceramic catalytic ozonation and activated carbon catalytic ozonation and activated carbon filter combination process operation characteristics.
Under experimental conditions, the gas-liquid mass transfer capacity of honeycomb ceramic catalytic reactor is slightly lower than that of ozone reactor, but when the gas-water ratio is greater than 0.15, the gas-liquid mass transfer capacity exceeds that of ozone reactor. The gas holdup (Eg) of ozone reactor and honeycomb ceramic catalytic oxidation reactor is 0.19% and 0.15% respectively when the gas volume is 0.L m3/h, indicating that the size of bubbles in the catalytic oxidation reactor is large, which is not conducive to gas-liquid mass transfer. The Pe values of ozone reactor and honeycomb ceramic catalytic reactor were 3.14 and 5.25, respectively, in the liquid pulse addition test, indicating that the liquid level pushing flow component in catalytic oxidation reactor is higher, which is conducive to gas-liquid mass transfer. The gas-liquid mass transfer efficiency of catalytic oxidation reactor is more affected by increasing gas-water ratio.v
Offline CLM  
#87 Gönderildi : 5 Ocak 2022 Çarşamba 03:48:17(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

As well as related industries of cigarette filter, wood floor moistureproof, taste absorption, automobile gasoline evaporation pollution control, the preparation of various impregnation liquid, etc.
Activated carbon in the future will have excellent development prospects and broad sales market.
Main uses of activated carbon:activated carbon gold mining
1. Used for liquid phase adsorption of activated carbon
· White water, T. Industrial water, electroplating wastewater, pure water, beverage, food, medicine water purification and preparation of electronic ultra-pure water.
· Decolorization, purification and purification of sucrose, xylose, monosodium glutamate, medicine, citric acid, chemical products and food additives
- Decolorization, impurity removal and flavor removal of grease, oil products, gasoline and diesel oil, purification, deodorization and impurity removal of alcohol and beverages, purification, refining, decolorization and filtration of products in fine chemical industry, pharmaceutical chemical industry and biological pharmaceutical process.
· Purification, decolorization, deodorization and COD reduction of environmental engineering wastewater and domestic wastewater
2. Used for gas phase adsorption of activated carbonactivated carbon company
Use: newly decorated houses, rooms, office buildings, hotels, air-conditioned rooms, entertainment places, new furniture, cars and other places on: "happy forest" can deodorize, disinfect, purify the air.
Offline CLM  
#88 Gönderildi : 5 Ocak 2022 Çarşamba 04:39:53(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

When the adsorption speed and desorption speed of activated carbon in the solution is equal, that is, the number of activated carbon adsorption is equal to the number of desorption, the concentration of the adsorbed material in the solution and the concentration on the surface of activated carbon are no longer intermingled, that is, to achieve the balance, the dynamic balance at this time is called activated carbon adsorption balance.
At this time, the concentration of the adsorbed substance in the solution is called equilibrium concentration.In aerobic part, a self-made internal circulating biological fluidized bed reactor was used to treat organic pesticide wastewaterThe effects of internal circulating biological fluidized bed on the removal of organic matter and the deamination of organic pesticide wastewater, the change of wastewater biodegradability and acute biological toxicity were investigated.The results show that the internal circulation biological fluidized bed with granular activated carbon as the carrier has a fast speed of membrane and can be cultured in about days by the rapid sludge drainage methodOut of activated sludge.The internal circulating biological fluidized bed with granular activated carbon as the carrier is not sensitive to temperature change at 1 ℃, and has a certain impact resistance ability.Aeration amount has effect on the treatmentToo large or too small aeration will reduce the reactor treatment efficiency.The optimal hydraulic retention time of the internal circulating biological fluidized bed using granular activated carbon as carrier is, and the treatment effect will be affected if the hydraulic retention time is too long or too short.activated carbon pellets wholesale
At the aeration rate of /,During hydraulic retention, the total helium removal rate is.%,.%, water effluent/up tothe biodegradability of wastewater was significantly improved, and the acute biological toxicity was reduced by %.When the efficiency of internal circulating activated carbon biological fluidized bed treatment is.%, the reaction is obtainedwww.powdered-activated-carbon.com
Offline CLM  
#89 Gönderildi : 5 Ocak 2022 Çarşamba 04:43:48(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

When the adsorption speed and desorption speed of activated carbon in the solution is equal, that is, the number of activated carbon adsorption is equal to the number of desorption, the concentration of the adsorbed material in the solution and the concentration on the surface of activated carbon are no longer intermingled, that is, to achieve the balance, the dynamic balance at this time is called activated carbon adsorption balance.
At this time, the concentration of the adsorbed substance in the solution is called equilibrium concentration.In aerobic part, a self-made internal circulating biological fluidized bed reactor was used to treat organic pesticide wastewaterThe effects of internal circulating biological fluidized bed on the removal of organic matter and the deamination of organic pesticide wastewater, the change of wastewater biodegradability and acute biological toxicity were investigated.The results show that the internal circulation biological fluidized bed with granular activated carbon as the carrier has a fast speed of membrane and can be cultured in about days by the rapid sludge drainage methodOut of activated sludge.The internal circulating biological fluidized bed with granular activated carbon as the carrier is not sensitive to temperature change at 1 ℃, and has a certain impact resistance ability.Aeration amount has effect on the treatmentToo large or too small aeration will reduce the reactor treatment efficiency.The optimal hydraulic retention time of the internal circulating biological fluidized bed using granular activated carbon as carrier is, and the treatment effect will be affected if the hydraulic retention time is too long or too short.activated carbon gold mining
At the aeration rate of /,During hydraulic retention, the total helium removal rate is.%,.%, water effluent/up tothe biodegradability of wastewater was significantly improved, and the acute biological toxicity was reduced by %.When the efficiency of internal circulating activated carbon biological fluidized bed treatment is.%, the reaction is obtainedactivated carbon company
Offline CLM  
#90 Gönderildi : 5 Ocak 2022 Çarşamba 04:46:49(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Raw materials are commonly used graphite and common chemicals, easy to operate, easy to enlarge. It solves the problem that graphene materials are expensive and cannot enter the field of industrial application without large-scale production. It provides a basis for large-scale application of graphene.Using the super conductivity and large specific surface area of graphene solves the problem that the traditional activated carbon material can no longer improve the electric storage performance when used on the electrode. Complete set of equipment in addition to solve the industrial method of graphene liquid phase composite to activated carbon materials for super capacitor, and can be activated activated carbon materials at room temperature. Complete sets of equipment meet the requirements of cleaner production.
Chapter 2 The quality of graphene prepared by this project is guaranteed.
The graphene prepared by white has a high monolayer rate (up to 99%), fewer defects, and can be dried for a long time. Can be prepared into a variety of solutions to facilitate compounding with other materials. Raw material is natural graphite from a wide range of sources, is prepared by industrial methods can be scaled up production. To make the industrial application of graphene possible, promote the advancement of high-tech materials, and promote industrial development.activated carbon for gold recovery[/ur
Chapter 3 Graphene-modified activated carbon for supercapacitor has good technical performance:Long cycle life, graphene modified ultracapacitors mountain in its storage process does not produce chemical reaction, the energy storage process is reversible, no "memory effect", can be repeated charge and discharge hundreds of thousands of times, 500 times that of corrosion ion batteries, nickel-metal hydride and nickel cadmium battery is 1000 times, if the ultracapacitors charge-discharge 20 times a day, continuous use of up to 68 years:
High efficiency: super current discharge capacity, high energy conversion efficiency, small process loss, high current energy cycle efficiency ≥90%.[url=https://www.chinactivecarbon.com/]activated carbon wholesale
Offline CLM  
#91 Gönderildi : 12 Ocak 2022 Çarşamba 04:05:30(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

1. The humidification outside the tower is only 5% higher than the humidification and cooling inside the tower, but the humidification outside the tower has the advantages of simplifying the system process, reducing investment, and reducing the wall sticking inside the tower.
2. Activated carbon has a certain effect on the removal of nitrogen oxides. In the test, the high concentration of SOZ in the flue gas affected the removal of NO by activated carbon, and the measured removal rate was about 10%.
3. The removal rate of HCl by activated carbon is up to 50%, but the removal effect of acid gas H and SO3 is not obvious.gold adsorption on activated carbon
In the test, the desulfurization effect of the cloth bag dust remover was tested, and its desulfurization rate was about 9%.
4. Analyze the reasons for the low SOZ and NO removal efficiency of activated carbon in the test :(1) ordinary activated carbon is used in the test, which has a low adsorption performance;
(2) Due to the limited test conditions, the low input amount of activated carbon per hour in the test means the selected ACIS is lower.
Although the removal efficiency of the activated carbon on SO2 and NO measured in this test is low, the activated carbon used in circulating fluidized bed flue gas desulfurization and denitration has the advantages of simple and reliable process, low system resistance, stable desulfurization and denitration, good economic and environmental protection, NO secondary pollution and so on.
The adsorption properties of activated carbon fiber or modified activated carbon should be further studied.
Activated carbon desulfurization and denitration technology will be a promising technology for the combined removal of pollutants from coal burning.>www.chinactivecarbon.com
Offline CLM  
#92 Gönderildi : 12 Ocak 2022 Çarşamba 07:30:17(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Industry, agriculture and many other fields.
In recent years, one of the research hotspots of activated carbon is to use cheap agricultural and forestry wastes as raw materials and simple and clean process to prepare biomass activated carbon with high economic benefit and good adsorption performance.
If the agricultural and forestry wastes are effectively utilized and turned into treasures, it can not only create certain economic benefits, but also reduce its pollution to the environment, and achieve the purpose of treating waste with waste.
In this paper, using biomass (corn cob, rice husk and peanut shell) as raw material, the experimental research on the preparation of activated carbon from biomass was carried out on the self-built experimental platform, and the activation temperature, activation time, impregnation ratio and impregnation time and other activation and physicochemical characteristics were systematically studied.
Activated carbons with different specific surface area and pore structure were prepared by physical activation and chemical activation, changing carbonization and activation conditions.
The pore structure of activated carbon was analyzed by ASAP2020M aperture analyzer.
The surface structure characteristics of activated carbon and the pyrolysis process of biomass under different conditions were studied. The adsorption performance and yield of activated carbon prepared by two methods were discussed and compared.
The results show that activation condition and impregnation condition are the most important factors.
The optimum specific surface area of activated carbon prepared by physical activation method is 924.48m'/g, and the yield is 26.18%.
The optimum specific surface area of activated carbon prepared by chemical activation method is 1200.04 m2g, and the yield is 34%.
Although the specific surface area and yield of the chemical activation method are the largest, it can be seen that the activated carbon prepared by the physical activation method has higher economic benefit and environmental protection value considering the economic benefit and environmental protection value of the preparation process comprehensively.
Finally, based on the preparation of activated carbon from biomass, the adsorption equilibrium and kinetics of the prepared activated carbon for methylene blue and the adsorption characteristics of mercury in flue gas were studied.
The theoretical basis for its application in printing and dyeing wastewater treatment and mercury removal from flue gas is given.
In the experiment of adsorption equilibrium and kinetics of methylene blue on activated carbon, the experimental results show that the Freundlich adsorption isotherm model is more accurate to describe the adsorption phase equilibrium of methylene blue on activated carbon.
imagitarium activated carbon pellets

The Freundlich adsorption isotherm of methylene blue adsorption by activated carbon was expressed as: logQE =log59.293+ 0.42logc.
The kinetic data are consistent with the quasi-second-order kinetic model, which can more accurately describe the adsorption process of methylene blue on activated carbon.
The prepared activated carbon can effectively adsorb and remove methylene blue solution in different concentration range in aqueous solution, and the removal effect is better, which is a kind of adsorbent with development potential.www.powdered-activated-carbon.com
In activated carbon adsorption characteristics of mercury in flue gas of experiments, the experimental results show that: the preparation of activated carbon and commercial activated carbon has the same ability to mercury, commercial activated carbon on mercury adsorption efficiency was 53.5%, the biggest physical activation, the preparation of activated carbon on mercury adsorption efficiency was 47.5%, the largest chemical activation of the activated carbon prepared by the biggest adsorption efficiency for the mercury is 57.64%.
According to the above experimental results, biomass is an ideal raw material for the preparation of activated carbon, and the prepared activated carbon is an adsorbent with development potential.
By comprehensive comparison between physical activation method and chemical activation method, the activated carbon prepared by physical activation method has better economic benefit and environmental protection value.
Offline CLM  
#93 Gönderildi : 14 Ocak 2022 Cuma 04:27:26(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

The industrial and industrial production of graphene with low cost and large output can be completed, which will greatly promote the development of downstream industries.
Using graphene's remarkable physical and chemical properties, electrons can travel through graphene much faster than they can through silicon, creating more sensitive sensors, electronic components, displays, solar cells and hydrogen storage devices.
Pacific Northwest National Laboratory and Princeton University are working with a private company to develop a high-capacity, fast-charging battery.
The secret is to add graphene to lithium-ion batteries to improve power and cycle stability.
Researchers at Stanford University say graphene-based lighting could be cheap and environmentally friendly.
Graphene-based LECs could replace metal-based OLEDs(organic light-emitting diodes). They could also replace traditional metal-based graphite electrodes in lamps, making them cheaper and easier to recycle.
Researchers in China found that bacterial cells on graphene paper were unable to grow, while human cells were not damaged.>www.chinactivecarbon.com
Take advantage of this by making bandages, food wrappers and even antibacterial t-shirts.
The scientific community is paying close attention to the research progress of graphene, this amazing material once put into practice will bring revolutionary changes to human society.gold adsorption on activated carbon
Offline CLM  
#94 Gönderildi : 15 Ocak 2022 Cumartesi 04:18:34(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

(1) coal-based activated carbon, also known as coal-based activated carbon.
It is a general term for a large class of activated carbon products made of various raw coal through different processes.Coal-based activated carbon can be divided into molding carbon and raw coal direct crushing carbon according to the different manufacturing process.
The former and can be further subdivided into wet molding charcoal (such as tar, papermaking black liquor, such as starch paste liquid adhesive manufacturing columnar, ball charcoal, honeycomb carbon, etc.) and dry molding charcoal (such as join solid bitumen, starch, such as tree powder as adhesive used for Mao briquette made of molding process, tabletting, pelleting and broken charcoal or rules of pelleting shape activated carbon).
Generally speaking, forming carbon can be mixed with a variety of raw coal to adjust the pore distribution characteristics of the final product, so as to obtain some special application performance, and more than 80% of the pore distribution characteristics of raw coal directly broken carbon has been determined by the raw material, so the performance and use is simple.
(2) wood activated carbon.It is mshell/core activated carbon.Such as coconut shell carbon, apricot kernel carbon, peach kernel carbon, etc.(4) petroleum activated carbon.Using petroleum asphalt, petroleum coke as raw materials, made of activated carbon products.resin activated carbon.Using phenolic resin, waste ion exchange resin as raw materials, through a special process of activity.Carbon products, sometimes fibrous carbon also falls into this category.High - definition watermark of cut document under air(6) other small varieties of activated carbon products.
Made of animal blood blood carbon, made of animal bones bone charcoal (there is very little, but bone charcoal carbon main ingredients of hydroxy calcium phosphate), with active carbon molecular sieve made of various materials, made of strong base and carbon materials of high surface area activated carbon, is made of organic polymer solution after mold made of special process method of activated carbon, activated carbon aerogels and so on.gold adsorption on activated carbon
Some of them are very small production and dosage, and some are still in the laboratory research stage, so they are included in the category of small varieties of activated carbon products.
ade of all kinds of hard wood, crop wastes, and other industrial and agricultural wastes containing lignocellulose
The beansMaterial as raw material, through the chemical method, physical method or physical-chemical combination of activated carbon.>www.chinactivecarbon.com
Offline CLM  
#95 Gönderildi : 15 Ocak 2022 Cumartesi 04:20:18(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

1. Combined with Zeta potential, sedimentation experiment, viscosity measurement and other methods, the influence of various dispersants on CEO and slurry suspension effect was studied.
The results showed that the formula with good stability was the appropriate concentration of mixed dispersant (NAP +SBN) or (NAP +PAM+SBN).
2. The removal rate of CEOZ slurry prepared with mixed dispersant (NAP +PAM+SBN) in the processing of K9 glass by MASJP was higher than that of other mixed dispersants.
By comparing the processing effect of MASJP with and without mixed additives, it is found that the processing effect of MASJP with mixed additives (NAP +PAM+SBN) has higher surface quality, which can significantly reduce the interface area between the polished area and the unpolished surface and increase the smooth surface as much as possible.3. Combining online observation and single factor method, the formation process of the surface features of the polished area was studied. The experimental results showed that the surface morphology of the polished area showed a W-shaped bowl structure in the vertical jet machining, and an eccentric bowl structure in the crescent shape in the oblique jet machining.Compared with the abrasive water jet machining effect, it is found that the W shape and crescent shape characteristics of the polishing region of MASJP are relatively flat, the smooth surface is larger and the surface quality is higher.
4. When applying nozzle with different outlet shapes in MASJP, it is found that the fluid ejected from the cylindrical nozzle flows out along the direction of the jet and does not disperse.
The processing area of the fan-shaped nozzle is large, the polishing area is approximately a rectangle, and the removal depth near the nozzle is larger.Hollow conical nozzle processing finished parts, the polishing area formed a hollow circle, the central part of the removal of less, the circumference of the removal of deep;The removal depth of the polishing area decreases gradually from the center to the circumference after the finished piece is processed by the solid conical nozzle.imagitarium activated carbon pellets
5, the workpiece surface profile and material removal depth with the selection of polishing slurry composition changes.With the increase of abrasive concentration, the material removal depth increases, which is roughly in a proportional relationship.With the increase of abrasive particle size, the material removal depth also increases.www.powdered-activated-carbon.com
Offline CLM  
#96 Gönderildi : 15 Ocak 2022 Cumartesi 04:21:40(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Firstly, the adsorption and desorption isotherms of three activated carbons for coconut shell-based smoke and three activated carbons for apricot kernel based smoke were determined by low temperature nitrogen adsorption method. The specific surface area and total pore volume were calculated by BET model. The microstructure parameters and pore size distribution of micropores and mesopores were calculated by H-K method and BJH method, respectively. The surface morphology of activated carbon was also observed by scanning electron microscope. The results show that the pore structure of activated carbon for commercial tobacco is different at present. Among the six activated carbon samples selected, Y1 and CTN are microporous activated carbon, and the micropore ratio is more than 97%. X3 and X5 samples were medium pore activated carbon with microporosity of only 69.3% and 55.5%. The micropore contents of X2 and Y5 samples were 87.2% and 81.8%, respectively, between X3 and X5 samples and Y1 and CTN samples. SEM observation of the surface morphology of activated carbon samples for smoke showed that the surface of activated carbon was honeycomb-like with developed pores, and the large pores were all in the shape of open pipe structure. There were various small circular and elliptical holes on the pipe wall.gold adsorption on activated carbon
Then, comprehensively examines the activated carbon pore structure of mainstream smoke particles with phase content in the conventional chemical composition is the relationship between the filtration efficiency, found that adding activated carbon can be reduced in different degrees in cigarette mainstream smoke conventional component content, and under the condition of the same dosage of activated carbon, the ternary composite way of flue gas composition of conventional filtration efficiency higher than binary compound mode. In the process of adsorption of flue gas components, the specific surface area of activated carbon with different pore structures determines its total adsorption capacity, and the pore size distribution affects its adsorption selectivity. The contents of total particulate matter, nicotine, moisture and tar in the mainstream smoke of cigarettes all increased stably with the increase of the number of suction outlets. In the process of cigarette smoking, the filtration efficiency of activated carbon with different pore structure to the conventional components of smoke changed dynamically with the increase of the number of suction ports. Qualitative description method was used to evaluate the sensory quality of activated carbon cigarettes. It was found that the addition of activated carbon increased the smoke suction resistance, reduced the smoke concentration and aroma, reduced the irritation, and had no obvious peculiar smell and discomfort, and had no negative effect on the sensory quality of cigarettes.>www.chinactivecarbon.com
Offline CLM  
#97 Gönderildi : 18 Ocak 2022 Salı 04:38:49(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

1. Combined with Zeta potential, sedimentation experiment, viscosity measurement and other methods, the influence of various dispersants on CEO and slurry suspension effect was studied.
The results showed that the formula with good stability was the appropriate concentration of mixed dispersant (NAP +SBN) or (NAP +PAM+SBN).
2. The removal rate of CEOZ slurry prepared with mixed dispersant (NAP +PAM+SBN) in the processing of K9 glass by MASJP was higher than that of other mixed dispersants.
By comparing the processing effect of MASJP with and without mixed additives, it is found that the processing effect of MASJP with mixed additives (NAP +PAM+SBN) has higher surface quality, which can significantly reduce the interface area between the polished area and the unpolished surface and increase the smooth surface as much as possible.3. Combining online observation and single factor method, the formation process of the surface features of the polished area was studied. The experimental results showed that the surface morphology of the polished area showed a W-shaped bowl structure in the vertical jet machining, and an eccentric bowl structure in the crescent shape in the oblique jet machining.Compared with the abrasive water jet machining effect, it is found that the W shape and crescent shape characteristics of the polishing region of MASJP are relatively flat, the smooth surface is larger and the surface quality is higher.
4. When applying nozzle with different outlet shapes in MASJP, it is found that the fluid ejected from the cylindrical nozzle flows out along the direction of the jet and does not disperse.
The processing area of the fan-shaped nozzle is large, the polishing area is approximately a rectangle, and the removal depth near the nozzle is larger.Hollow conical nozzle processing finished parts, the polishing area formed a hollow circle, the central part of the removal of less, the circumference of the removal of deep;The removal depth of the polishing area decreases gradually from the center to the circumference after the finished piece is processed by the solid conical nozzle.gold adsorption on activated carbon
5, the workpiece surface profile and material removal depth with the selection of polishing slurry composition changes.With the increase of abrasive concentration, the material removal depth increases, which is roughly in a proportional relationship.With the increase of abrasive particle size, the material removal depth also increases.>www.chinactivecarbon.com
Offline CLM  
#98 Gönderildi : 18 Ocak 2022 Salı 04:44:40(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Activated carbon is a carbon adsorption material with coal, wood and nut shell as raw materials, used in gas adsorption.
Separation, purification and separation of liquid purification and other fields.

The industrial application of activated carbon by appearance distinguish forming granular activated carbon, are there not finalize the granular activated carbon, powdered activated carbon, activated carbon fiber, etc., main application fields including wastewater treatment, activated carbon depth clean drinking water, medicine and food decolorizing refining, precious metal extraction, gas separation and purification, solvent recovery, and military and civil protection.
Taking coal as raw material to the production of coal based activated carbon is a kind of has a developed interspaces structure of carbonaceous adsorption material, has good chemical stability and mechanical strength, coal based activated carbon products can be widely used in decoloring purification, solvent recovery, gas separation, gas purification, and various kinds of water treatment and other fields, some through special processing, the special T also can be used as a high-performance activated carbon desulfurization agent, catalyst and catalyst carrier, mountain in the acid and alkali resistant, heat resistant, granular activated carbon on adsorption saturation after failure, can be a party to regenerate.
The application of coal-based activated carbon is divided into liquid phase and gas phase according to the characteristics of the material. The liquid phase is mainly used in decolorization, recovery of precious metals and water treatment.www.powdered-activated-carbon.com
Gas phase is mainly used in gas purification and recovery, industrial waste gas treatment, flue gas desulfurization and gas protection, etc.
In recent years, some foreign activated carbon manufacturers have developed coal-based activated carbon with special adsorption capacity by adopting new processes, new methods and advanced raw material treatment technology, which has greatly improved and enhanced the performance of coal-based activated carbon products, expanded the application field and highlighted a broader market prospect.
In order to buy qualified carbonized material as raw material, compared with direct raw coal as raw material to produce coal quality activated carbon, eliminating the raw coal washing, crushing, kneading, carbonization and a series of procedures, so the whole production process is short, small pollution production.
The focus of the whole production process is the activation section. At the present stage, some domestic activated carbon production enterprises use air as the activation gas in the activation process. Although it is cheap and easy to get, the air used as the activation gas in the production of activated carbon has a high burning loss rate, low product yield and low finished strength of activated carbon particles.
Offline CLM  
#99 Gönderildi : 18 Ocak 2022 Salı 04:47:21(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

Electrochemical modification is to change the electrical and chemical properties of activated carbon surface by using micro electric field, so as to improve the adsorption selectivity and performance.It does not need to add chemical agents, does not need to heat, does not cause pollution to the environment, low energy consumption, only a few hundred millivolts, easy to operate.The results show that the adsorption equilibrium of activated carbon is dependent on the electric potential: the adsorption amount of activated carbon increases with the increase of the potential, and the adsorption speed is accelerated;Arpolarity polarization is beneficial to the adsorption of chloroform by activated carbon, while cathodic polarization inhibits the adsorption of chloroform by activated carbon 3-341]. Activated carbon heteroatom carrier and compound modificationActivated carbon has very high stability and good activity, these two basic properties become the activated carbon as a catalyst or catalyst carrier conditions.By introducing certain heteroatoms and compounds on the surface of activated carbon by liquid phase deposition, the adsorption performance of activated carbon can be increased by using the binding effect between these substances and adsorbents.compounds, which has the advantages of increasing the reaction rate and increasing the adsorption capacity.Yang Quanhong et al. 'Using FESO;Activated carbon material was modified.gold adsorption on activated carbon
The experimental results show that the surface structure of the activated carbon material modified by FeSO changes: the specific surface area decreases, the surface oxygen content increases, the plane of the random layer graphite carbon net is destroyed to a certain extent, and the ammonia absorption capacity and benzene absorption performance of the sample are greatly enhanced.He ChunHong et al. [reported the research progress of supporting activated carbon materials in the removal of SO; the removal ability of SO was significantly enhanced after supporting Co, Ni, Mg, and V compounds, which was due to the formation of Co(OH)2, Ni(OH)2, Mg (OH)2, and V,0 microcrystals on the surface of activated carbon after supporting, which enhanced the desulfurization activity of activated carbon.>www.chinactivecarbon.com
Offline CLM  
#100 Gönderildi : 18 Ocak 2022 Salı 04:49:59(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 181
Hong Kong
Konum: 香港

The polishing slurry and processing technology of micro-abrasive slurry jet were studied.
Through the analysis of the physical and chemical properties of additives and their state changes under the jet, the comprehensive effects of the types and proportions of different additives, as well as the types, proportions and particle sizes of abrasive on the formation of uniform slurry, the promotion of good abrasive dispersion and the jet polishing effect were explored.
The effects of different types of nozzles, polishing slurry, jet distance, jet time, different initial RA, jet pressure and jet Angle on the surface profile, material removal depth and surface quality of the workpiece were studied through polishing experiments.
The local Ra of the optical glass surface is in the range of 20nm~50nm by MASJP, and the lowest Ra is 10.24nm.
imagitarium activated carbon pellets
1. Combined with Zeta potential, sedimentation experiment, viscosity measurement and other methods, the influence of various dispersants on CEO and slurry suspension effect was studied.
The results showed that the formula with good stability was the appropriate concentration of mixed dispersant (NAP +SBN) or (NAP +PAM+SBN).www.powdered-activated-carbon.com
Bu konudaki kullanıcılar
Guest (3)
6 Sayfalar«<3456>
Forumu Atla  
Bu foruma yeni konular postalayamazsınız.
Bu forumda ki konulara yeni posta gönderemezsiniz.
Bu forumdaki postalarınızı silemezsiniz.
Bu forumdaki postalarınızı düzenleyemezsiniz.
Bu forumda anketler yaratamazsınız.
Bu forumdaki anketlere oy veremezsiniz.

Ateşleme trafoları,ozon trafolarıMaxwell Heroes(Beta)