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

Bildirim

Icon
Error

6 Sayfalar<1234>»
Ayarlar
Son mesaja git Go to first unread
Offline CLM  
#21 Gönderildi : 23 Ekim 2021 Cumartesi 03:43:06(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

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%.
The experimental results show that the adsorption equilibrium of pure components is in good agreement with the Langmuir equation.
In the case of multi-component adsorption, due to the competition and interference between each component, the component with strong adsorption ability can replace the other component that has been absorbed, so that the penetration curve of each component has obvious changes.
The penetration point of the components with relatively weak adsorption capacity was significantly advanced, while the penetration time of the components with strong adsorption capacity was delayed.
In this paper, E-L equation and IAST theory are used for theoretical prediction and analysis of multi-component adsorption equilibrium, and compared with experimental results.
The results show that although the prediction of total adsorption amount by E-L equation is in good agreement with the experimental results, the prediction of each component adsorption amount by E-L equation often produces positive and negative deviation, and the average error is usually more than 20%.wholesale activated carbon pellet
However, IAST can eliminate the positive and negative deviation well, and the average error is less than 10%, which is more consistent with the experimental results.
The operating parameters showed that the adsorption capacity of activated carbon would decrease with the increase of temperature, gas velocity or humidity.
The appropriate operating range is: temperature within 40℃, gas speed between 0.1~0.5 m/s, humidity is best not more than 40%.
In this range, the relationship between pressure drop and gas velocity basically conforms to Ergun equation.www.chinactivecarbon.com/
Offline CLM  
#22 Gönderildi : 23 Ekim 2021 Cumartesi 03:49:12(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Industry should beActivated carbon also requires high mechanical strength, good wear resistance, its structure is stable, small energy required for adsorption, in order to be conducive to regeneration.Activated carbon for oilDecolorization, deodorization, gas separation, solvent recovery and air conditioning of fat, beverage, food and drinking water, used as catalyst or adsorbent for body and gas mask.Physical characteristics:Activated carbon is a kind of multi-aperture carbonization, has a very rich pore structure, has good adsorption characteristics, its adsorption by physical and chemicalAbsorbed from the force, the appearance of the color and lustre is black.Its composition in addition to the main carbon, but also contains a small amount of hydrogen, nitrogen, oxygen, its structure is shaped like a hexagon, due to the irregular hexagon structure, determine the characteristics of its body also incandescentand high surface area, each gram of activated carbon has the equivalent of 1000 square meters than the surface.Chapter 1 This project adopts the company's own large amount of monolayer stone which can be dried and preserved and treated with solution
Preparation method of graphite namely graphene.
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 defegranular activated charcoalcts, 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.coal activated carbon supplier
Offline CLM  
#23 Gönderildi : 25 Ekim 2021 Pazartesi 08:53:36(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

The general use of medicinal or chemical pure activated carbon. This kind of activated carbon particles is very fine, in powder form, the total surface area is particularly large, the adsorption capacity is very strong, the adsorption capacity is also very large, is the strongest kind of activated carbon adsorption force. But because the particles are too fine, the flow rate is too slow in the process of chromatography, the operation of pressure or decompression is needed, the procedure is more complicated, and the adsorption selectivity of various components is also poor, so it is less used in chromatography.coal activated carbon supplier
Medicinal or chemical pure activated carbon before leaving the factory after impurity treatment and metal limit inspection, can be used directly for chromatography. Industrial activated carbon is not processed by impurities before leaving the factory, often contains metal ions, affecting the separation effect, so it must be treated before use, its treatment methods are two.granular activated charcoal
Offline CLM  
#24 Gönderildi : 25 Ekim 2021 Pazartesi 08:57:59(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Especially in the field of medicine, activated carbon, as a highly effective gastrointestinal cleaning agent, can effectively adsorb pesticide residues, fungicides, heavy metals, dioxins, various pathogenic bacteria and toxins in the digestive tract and human body that damage human health or cause disease wastes, harmless to human body.
With the rapid development of pharmaceutical preparation industry and primary molecular material industry, the microencapsulated activated carbon products coated with polymer materials have been successfully trial-produced in foreign countries, and applied in clinical practice, the medical care and treatment effect is very good, many of them have been put into the market, and have achieved good economic and social benefits.
It is worth noting that there is a shortage of activated carbon in China. For a long time, the production of drugs using activated carbon as raw materials has been kept in the laboratory, and no products have been marketed or used in clinical trials.wholesale activated carbon pellet
Experts said that with the continuous improvement of people's life quality and health care consciousness enhancement, as well as the rapid development of all kinds of industrial, environmental pollution has been increasingly serious, people an opportunity to contact with a variety of harmful material, activated carbon and activated carbon as the leading raw material to produce medicines and health products, medical market will become a major conventional leading consumer products,www.chinactivecarbon.com/
Offline CLM  
#25 Gönderildi : 25 Ekim 2021 Pazartesi 08:59:16(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

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%.Activated carbon according to its source is usually divided into plant carbon, animal carbon and mineral carbon three kinds, respectively, the use of wood chips or plant fiber, animal bones, coal and so on by high temperature carbonization. At present, the commonly used medical activated carbon and activated carbon chromatography with wood chips as raw materials, add zinc chloride in 700-800 by high temperature carbonization, activation, and by appropriate methods to remove impurities. Due to the presence of various metal ions in plants and the addition of zinc chloride in the production process, although it has been properly treated before leaving the factory, it is inevitable to contain trace metal ions, which should be paid attention to when used. Activated carbons used for chromatography generally fall into the following three categories.
coal activated carbon supplier
(a). Powdered activated carbon
The general use of medicinal or chemical pure activated carbon. This kind of activated carbon particles is very fine, in powder form, the total surface area is particularly large, the adsorption capacity is very strong, the adsorption capacity is also very large, is the strongest kind of activated carbon adsorption force. But because the particles are too fine, the flow rate is too slow in the process of chromatography, the operation of pressure or decompression is needed, the procedure is more complicated, and the adsorption selectivity of various components is also poor, so it is less used in chromatography.
Medicinal or chemical pure activated carbon before leaving the factory after impurity treatment and metal limit inspection, can be used directly for chromatography. Industrial activated carbon is not processed by impurities before leaving the factory, often contains metal ions, affecting the separation effect, so it must be treated before use, its treatment methods are two.granular activated charcoalcarbon.com/]granular activated charcoal[/url]
Offline CLM  
#26 Gönderildi : 26 Ekim 2021 Salı 03:29:23(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

The effect of the amount and adding method of activated carbon on smoke emission of cigarettes was investigated. It was found that the filtration efficiency of ternary compound filter was higher than that of binary compound filter under the influence of plasticizer when the amount of activated carbon was constant. With the increase of the amount of activated carbon, the filtration efficiency of the two kinds of composite filters increases. The effects of the amount of activated carbon on the filtration efficiency of the compounds with different volatiles are different.activated charcoal powder The effects of the amount of activated carbon on the filtration efficiency of the isomers are similar due to their close molecular weight and boiling point. When the dosage is small, the competitive adsorption is easy to occur. The adsorption amount of refractory components such as acetaldehyde is small, and the competition can be reduced by increasing the dosage. The filtration efficiency of refractory components shows an obvious upward trend with the increase of the dosage.The general use of medicinal or chemical pure activated carbon. This kind of activated carbon particles is very fine, in powder form, the total surface area is particularly large, the adsorption capacity is very strong, the adsorption capacity is also very large, is the strongest kind of activated carbon adsorption force. But because the particles are too fine, the flow rate is too slow in the process of chromatography, the operation of pressure or decompression is needed, the procedure is more complicated, and the adsorption selectivity of various components is also poor, so it is less used in chromatography.
Medicinal or chemical pure activated carbon before leaving the factory after impurity treatment and metal limit inspection, can be used directly for chromatography. Industrial activated carbon is not processed by impurities before leaving the factory, often contains metal ions, affecting the separation effect, so it must be treated before use, its treatment methods are two.www.activated-carbon-pellets.com
Offline CLM  
#27 Gönderildi : 27 Ekim 2021 Çarşamba 03:44:11(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

In painting, printing, shoe making, plastic, rubber, bonding and other industrial processes, there are a large number of organic waste gas emissions.These waste gas, often contain benzene, toluene, xylene, ethyl acetate, methanol and other organic matter, itself toxic, long-term damage can lead to human death.The emission of this kind of waste gas, countries have clear provisions, strict control of its emission concentrationThe treatment of organic waste gas has been studied for a long time, and some effective control technologies have been developed.The widely used and studied control techniques include adsorption method, thermal destruction method, condensation method, absorption method, etc.
emissions.It is estimated that more than 30 million tons of organic matter are released into the atmosphere worldwide every year, posing a serious threat to human health and plant and animal growth.Organic pollutants are mostly produced in industrial processes.
In painting, printing, shoe making, plastic, rubber, bonding and other industrial processes, there are a large number of organic waste gas emissions.These waste gas, often contain benzene, toluene, xylene, ethyl acetate, methanol and other organic matter, itself toxic, long-term damage can lead to human death.The emission of this kind of waste gas, countries have clear provisions, strict control of its emission concentrationThe treatment of organic waste gas has been studied for a long time, and some effective control technologies have been developed.The widely used and studied control techniques include adsorption method, thermal destruction method, condensation method, absorption method, etc.
coal activated carbon supplier
Among them, the adsorption method is widely used.Compared with other methods, the adsorption method has the advantages of high removal efficiency, thorough purification, low energy consumption, mature technology, recovery and solution, easy popularization and practical, and has good environmental and economic benefits.Activated carbon is the most commonly used adsorbent because of its huge specific surface area, large adsorption capacity, easy regeneration, abundant sources and low price.Although the application of charcoal as an adsorbent, human beings have had a long time, but the study of adsorption theory, but only in the end of the last century began to make progress.granular activated charcoal
Offline CLM  
#28 Gönderildi : 27 Ekim 2021 Çarşamba 03:45:35(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

The general use of medicinal or chemical pure activated carbon. This kind of activated carbon particles is very fine, in powder form, the total surface area is particularly large, the adsorption capacity is very strong, the adsorption capacity is also very large, is the strongest kind of activated carbon adsorption force. But because the particles are too fine, the flow rate is too slow in the process of chromatography, the operation of pressure or decompression is needed, the procedure is more complicated, and the adsorption selectivity of various components is also poor, so it is less used in chromatography.
Medicinal or chemical pure activated carbon before leaving the factory after impurity treatment and metal limit inspection, can be used directly for chromatography. Industrial activated carbon is not processed by impurities before leaving the factory, often contains metal ions, affecting the separation effect, so it must be treated before use, its treatment methods are two.
Can be used for exhaust treatment, air purification, solvent recovery, gas separation, deodorization, desulfurization and denitration, industry.Raw material gas refining, gas chromatography filler, air sampler, fresh-keeping, ozone removal, cigarette filter nozzle, gas adsorption storage, military and civil gas masks, etc.(2) liquid phase adsorption of activated carbon.Tap water treatment, pure water manufacturing, industrial and domestic sewage advanced treatment, decolorization refining, blood purification, gold recovery, double capacitor electrode, pharmaceutical carbon, etc.(3) catalyst (catalyst) with activated carbon.
Both can be directly used as a catalyst for this industrial process (such as phosgene synthesis, synthesis of vinyl acetate, etc.), more time activated carbon is used as a catalyst carrier (such as carrying precious metal pins, men, palladium, nails, gold made of pin carbon, palladium carbon catalyst, etc.).(1) solvent recovery.Such as recycling printing industry with xylene, toluene, benzene and other solvents;Recycling organic solvents such as ethanol, acetone, ester and ether from plastics and artificial leather industry;Recycling of hexanone in tape factory;Recycling of dichloromethane from resin processing plants, etc.(2) air purification.Such as electronic, pharmaceutical industry aseptic workshop air purification;Removal of ozone in the air of the copy room and computer room;The removal of foreign odor in the air of confined space;Odor removal from refrigerators, etc.(3) Nuclear and biochemical protection.Nuclear radiation, biological warfare agents, chemical warfare agents are weapons of mass destruction, activated carbon is loaded with a variety of chemical agents can effectively protect it
Activated carbon or chemical-loaded activated carbon is often used as a key component of personal protective equipment in the presence of toxic gases in the civilian industry. During the SARS crisis in late 2002 and early 2003, special protective masks with activated carbon loaded with silver played a role in protecting health care workers.wholesale activated carbon pellet
(4) deep purification treatment of tap water.Practice has proved that activated carbon is still has the best effect of the depth of water purification products, its dosage in recent | years show how multiple growth.
www.chinactivecarbon.com/
There is evidence that the next five years will be a rapid growth period for white water purification in China, and the demand for carbon for water purification will be a blowout development.(5). Deep purification treatment of industrial wastewater.
For example, the three-level decolorization of printing and dyeing wastewater, the removal of heavy metal ions from electroplating wastewater, the purification of papermaking wastewater and the removal of COD from petrochemical industrial wastewater to meet the discharge standards, activated carbon has been proved to be one of the most effective deep purification materials.
Offline CLM  
#29 Gönderildi : 27 Ekim 2021 Çarşamba 03:46:48(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
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.coal activated carbon supplier
Test of honeycomb ceramic catalytic reactor under the condition of gas-liquid mass transfer ability, lower ozone reactor but when gas water ratio greater than 0.15 oil-gas fluid mass transfer capacity will exceed ozone reactor. The gas holdup (EG) of the ozone reactor and the honeycomb ceramic catalytic oxidation reactor is 0.19% and 0.15% when the gas volume is 0.1 m'/h, respectively, indicating that the size of bubbles in the catalytic oxidation reactor is large, which is not conducive to gas-liquid mass transfer. The Pe parameters of ozone reactor and honeycomb ceramic catalytic reactor were 3.14 and 5.25, respectively, indicating that the liquid phase pushing component in catalytic oxidation reactor was higher, which was beneficial to gas-liquid mass transfer. The gas-liquid mass transfer efficiency of catalytic oxidation reactor is more affected by increasing gas-water ratio.granular activated charcoal
Offline CLM  
#30 Gönderildi : 28 Ekim 2021 Perşembe 03:23:19(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Under certain operating conditions, the gas mixture by adsorption bed, adsorption by adsorption, adsorption after a period of time, when starting from the adsorbent in the laminar flow of the gas adsorbed mass (or its concentration reaches a specified value), think bed fire, adsorption properties of adsorbent adsorption quantity at this time is called dynamic activity of adsorbent.
The activity is not only related to the characteristics of adsorbents and adsorbents, but also related to temperature, concentration and operating conditions.
The kinetic activity value of adsorbent is the main basis for the design of adsorption system.
The adsorption rateThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, the adsorption process can be divided intoThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, which can be divided into the following steps
(1) External diffusion, the adsorbate from the main air flow through the air film around the particles to the outer surface of the adsorbent; (2) Internal diffusion, the adsorbate from the outer surface through micropores to the surface of the adsorbent microporeswholesale activated carbon pellet
(3) adsorption, the adsorbent reached the microporous surface of the adsorbent is adsorbed
(4) The desorbed adsorbate diffuses to the main body of the gas phase through internal and external diffusionPhysical adsorption process is generally controlled by internal and external diffusion, chemical adsorption is controlled by both surface dynamics and internal and external diffusion.Because of the complexity of the adsorption process and many influencing factors, it is difficult to derive the rate theoretically, so it is generally determined by experience or model experiment.www.chinactivecarbon.com/
Offline CLM  
#31 Gönderildi : 28 Ekim 2021 Perşembe 03:25:55(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Under certain operating conditions, the gas mixture by adsorption bed, adsorption by adsorption, adsorption after a period of time, when starting from the adsorbent in the laminar flow of the gas adsorbed mass (or its concentration reaches a specified value), think bed fire, adsorption properties of adsorbent adsorption quantity at this time is called dynamic activity of adsorbent.
The activity is not only related to the characteristics of adsorbents and adsorbents, but also related to temperature, concentration and operating conditions.
The kinetic activity value of adsorbent is the main basis for the design of adsorption system.
The adsorption rateThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, the adsorption process can be divided intoThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, which can be divided into the following stepsgranular activated charcoal
(1) External diffusion, the adsorbate from the main air flow through the air film around the particles to the outer surface of the adsorbent; (2) Internal diffusion, the adsorbate from the outer surface through micropores to the surface of the adsorbent microporeswholesale activated carbon pellet
(3) adsorption, the adsorbent reached the microporous surface of the adsorbent is adsorbed
(4) The desorbed adsorbate diffuses to the main body of the gas phase through internal and external diffusionPhysical adsorption process is generally controlled by internal and external diffusion, chemical adsorption is controlled by both surface dynamics and internal and external diffusion.Because of the complexity of the adsorption process and many influencing factors, it is difficult to derive the rate theoretically, so it is generally determined by experience or model experiment.www.chinactivecarbon.com/
Offline CLM  
#32 Gönderildi : 28 Ekim 2021 Perşembe 03:27:56(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

With the rapid development of pharmaceutical preparation industry and primary molecular material industry, the microencapsulated activated carbon products coated with polymer materials have been successfully trial-produced in foreign countries, and applied in clinical practice, the medical care and treatment effect is very good, many of them have been put into the market, and have achieved good economic and social benefits.
It is worth noting that there is a shortage of activated carbon in China. For a long time, the production of drugs using activated carbon as raw materials has been kept in the laboratory, and no products have been marketed or used in clinical trials.
Experts said that with the continuous improvement of people's life quality and health care consciousness enhancement, as well as the rapid development of all kinds of industrial, environmental pollution has been increasingly serious, people an opportunity to contact with a variety of harmful material, activated carbon and activated carbon as the leading raw material to produce medicines and health products, medical market will become a major conventional leading consumer products,www.chinactivecarbon.com/
Market demand will be on the rise year by year, is a new economic growth point in the pharmaceutical and chemical market, its economic and social benefits will increase year by year.wholesale activated carbon pellet
Offline CLM  
#33 Gönderildi : 28 Ekim 2021 Perşembe 03:30:14(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Industry should beActivated carbon also requires high mechanical strength, good wear resistance, its structure is stable, small energy required for adsorption, in order to be conducive to regeneration.Activated carbon for oilDecolorization, deodorization, gas separation, solvent recovery and air conditioning of fat, beverage, food and drinking water, used as catalyst or adsorbent for body and gas mask.Physical characteristics:Activated carbon is a kind of multi-aperture carbonization, has a very rich pore structure, has good adsorption characteristics, its adsorption by physical and chemicalAbsorbed from the force, the appearance of the color and lustre is black.Its composition in addition to the main carbon, but also contains a small amount of hydrogen, nitrogen, oxygen, its structure is shaped like a hexagon, activated charcoal powderdue to the irregular hexagon structure, determine the characteristics of its body also incandescentand high surface area, each gram of activated carbon has the equivalent of 1000 square meters than the surface.The adsorption characteristics of pure acetone gas on activated carbon were measured. Langmuir model and Dubinin-Radushkevichv (D-R) model were used to fit the adsorption data, respectively. The Langmuir model and D-R model were compared from the Angle of model fitting accuracy and prediction of adsorption heat. Compared with Langmuir model, D-R model has higher fitting correlation coefficient and lower average relative standard deviation for adsorption data, so the fitting result is better. Based on 10-4-3 potential function, the theoretical adsorption heat of pure acetone gas on activated carbon is 17.9 kJ/mol, which is relatively small, indicating that the adsorption is mainly physical adsorption. The predicted value of adsorption heat of D-R model is 15.8kJ/mol, which is close to the theoretical calculated value, and the predicted value of adsorption heat of Langmuir model is 40.7 kJ/mol, which is much larger than the theoretical calculated value. It is found that the key to predict the filtration efficiency of different compounds is to predict the heat of adsorption of compounds. The filtration efficiency is mainly related to the adsorption temperature v, the amount of activated carbon, pore volume, molecular weight of the compound, collision diameter and energy parameters. The influence of pore size on filtration efficiency and adsorption selectivity can be obtained by analyzing adsorption energy.www.activated-carbon-pellets.com
Offline CLM  
#34 Gönderildi : 2 Kasım 2021 Salı 04:56:18(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Under certain operating conditions, the gas mixture by adsorption bed, adsorption by adsorption, adsorption after a period of time, when starting from the adsorbent in the laminar flow of the gas adsorbed mass (or its concentration reaches a specified value), think bed fire, adsorption properties of adsorbent adsorption quantity at this time is called dynamic activity of adsorbent.
The activity is not only related to the characteristics of adsorbents and adsorbents, but also related to temperature, concentration and operating conditions.
The kinetic activity value of adsorbent is the main basis for the design of adsorption system.
The adsorption rateThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, the adsorption process can be divided intoThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, which can be divided into the following steps
(1) External diffusion, the adsorbate from the main air flow through the air film around the particles to the outer surface of the adsorbent; (2) Internal diffusion, the adsorbate from the outer surface through micropores to the surface of the adsorbent micropores
(3) adsorption, the adsorbent reached the microporous surface of the adsorbent is adsorbed
(4) The desorbed adsorbate diffuses to the main body of the gas phase through internal and external diffusionPhysical adsorption process is generally controlled by internal and external diffusion, chemical adsorption is controlled by both surface dynamics and internal and external diffusion.Because of the complexity of the adsorption process and many influencing factors, it is difficult to derive the rate theoretically, so it is generally determined by experience or model experiment.At present, the organic pollution of drinking water source is relatively serious. The organic pollutants themselves are not only highly toxic, but also may generate halogenated disinfection by-products (DBPs) after chlorination disinfection. Meanwhile, the existence of organic compounds will reduce the biological stability of drinking water and lead to the secondary reproduction of microorganisms in the pipe network. Therefore, it is important to reduce the content of organic pollutants in drinking water. Conventional water treatment process has low removal efficiency for organic pollutants, so it is imperative to seek economic and efficient treatment technology. On the basis of giving full play to the advantages of ozone oxidation in the removal of organic matter, ozone catalytic oxidation technology can induce the formation of hydroxyl radical (·OH) with high oxidation ability, which can effectively remove trace organic pollutants in water and reduce the content of ozone oxidation by-products. Therefore, it is a drinking water treatment method with great application prospect.wholesale activated carbon pellet
Offline CLM  
#35 Gönderildi : 2 Kasım 2021 Salı 04:57:26(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Both can be directly used as a catalyst for this industrial process (such as phosgene synthesis, synthesis of vinyl acetate, etc.), more time activated carbon is used as a catalyst carrier (such as carrying precious metal pins, men, palladium, nails, gold made of pin carbon, palladium carbon catalyst, etc.).(1) solvent recovery.Such as recycling printing industry with xylene, toluene, benzene and other solvents;Recycling organic solvents such as ethanol, acetone, ester and ether from plastics and artificial leather industry;Recycling of hexanone in tape factory;Recycling of dichloromethane from resin processing plants, etc.(2) air purification.Such as electronic, pharmaceutical industry aseptic workshop air purification;Removal of ozone in the air of the copy room and computer room;The removal of foreign odor in the air of confined space;Odor removal from refrigerators, etc.(3) Nuclear and biochemical protection.Nuclear radiation, biological warfare agents, chemical warfare agents are weapons of mass destruction, activated carbon is loaded with a variety of chemical agents can effectively protect it
Activated carbon or chemical-loaded activated carbon is often used as a key component of personal protective equipment in the presence of toxic gases in the civilian industry. During the SARS crisis in late 2002 and early 2003, special protective masks with activated carbon loaded with silver played a role in protecting health care workers.
(4) deep purification treatment of tap water.Practice has proved that activated carbon is still has the best effect of the depth of water purification products, its dosage in recent | years show how multiple growth.
There is evidence that the next five years will be a rapid growth period for white water purification in China, and the demand for carbon for water purification will be a blowout development.(5). Deep purification treatment of industrial wastewater.granular activated charcoal
For example, the three-level decolorization of printing and dyeing wastewater, the removal of heavy metal ions from electroplating wastewater, the purification of papermaking wastewater and the removal of COD from petrochemical industrial wastewater to meet the discharge standards, activated carbon has been proved to be one of the most effective deep purification materials.coal activated carbon supplier
Offline CLM  
#36 Gönderildi : 3 Kasım 2021 Çarşamba 08:24:20(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Both can be directly used as a catalyst for this industrial process (such as phosgene synthesis, synthesis of vinyl acetate, etc.), more time activated carbon is used as a catalyst carrier (such as carrying precious metal pins, men, palladium, nails, gold made of pin carbon, palladium carbon catalyst, etc.).(1) solvent recovery.Such as recycling printing industry with xylene, toluene, benzene and other solvents;Recycling organic solvents such as ethanol, acetone, ester and ether from plastics and artificial leather industry;Recycling of hexanone in tape factory;Recycling of dichloromethane from resin processing plants, etc.(2) air purification.Such as electronic, pharmaceutical industry aseptic workshop air purification;Removal of ozone in the air of the copy room and computer room;The removal of foreign odor in the air of confined space;Odor removal from refrigerators, etc.(3) Nuclear and biochemical protection.Nuclear radiation, biological warfare agents, chemical warfare agents are weapons of mass destruction, activated carbon is loaded with a variety of chemical agents can effectively protect it
Activated carbon or chemical-loaded activated carbon is often used as a key component of personal protective equipment in the presence of toxic gases in the civilian industry. During the SARS crisis in late 2002 and early 2003, special protective masks with activated carbon loaded with silver played a role in protecting health care workers.
(4) deep purification treatment of tap water.Practice has proved that activated carbon is still has the best effect of the depth of water purification products, its dosage in recent | years show how multiple growth.www.chinactivecarbon.com/
There is evidence that the next five years will be a rapid growth period for white water purification in China, and the demand for carbon for water purification will be a blowout development.(5). Deep purification treatment of industrial wastewater.
For example, the three-level decolorization of printing and dyeing wastewater, the removal of heavy metal ions from electroplating wastewater, the purification of papermaking wastewater and the removal of COD from petrochemical industrial wastewater to meet the discharge standards, activated carbon has been proved to be one of the most effective deep purification materials.wholesale activated carbon pellet
Offline CLM  
#37 Gönderildi : 3 Kasım 2021 Çarşamba 08:26:23(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Activated carbon is a non-polar adsorbent, mainly used for the removal of pigment and the separation of water-soluble components such as amino acids, sugars and some water-soluble glycosides, he is one of the main methods for the separation of water-soluble components. Activated carbon column chromatography is characterized by easy raw material source, low price, large sample load, good separation effect, suitable for mass preparation separation. However, due to the production of activated carbon raw materials, preparation methods and specifications are different, its adsorption force is not as easy to control as silica gel, alumina. Up to now, there is no ideal method to determine the level of adsorption, which limits the wide application of activated carbon column chromatography.
one Source and preparation of activated carboncoal activated carbon supplier
Activated carbon according to its source is usually divided into plant carbon, animal carbon and mineral carbon three kinds, respectively, the use of wood chips or plant fiber, animal bones, coal and so on by high temperature carbonization. At present, the commonly used medical activated carbon and activated carbon chromatography with wood chips as raw materials, add zinc chloride in 700-800 by high temperature carbonization, activation, and by appropriate methods to remove impurities. Due to the presence of various metal ions in plants and the addition of zinc chloride in the production process, although it has been properly treated before leaving the factory, it is inevitable to contain trace metal ions, which should be paid attention to when used. Activated carbons used for chromatography generally fall into the following three categories.granular activated charcoal
Offline CLM  
#38 Gönderildi : 3 Kasım 2021 Çarşamba 08:35:38(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

Distillation, activation treatment after the production of activated carbon methods are :① steam, gas activation method.Carbon is activated by water vapor or carbon dioxide at 850~900℃.
② chemical activation method.Activated carbon can be obtained after high temperature treatment by using the gas released by the activator or soaking the raw material with the activator.Activated carbon has a micro product structure, the micro product arrangement is completely irregular, the product body has micropores (radius is less than 20[angstroms]=10-10 meters), through the hole (halfDiameter 20~1000), large hole (radius 1000~100000), so that it has a large inner surface, specific surface area of 500~1700 m 2/ g.This determines that activated carbon has good adsorption, can adsorb the metal ions in waste water and waste gas, harmful gases, organic pollutants, pigments and so on.wholesale activated carbon pellet
Industry should beActivated carbon also requires high mechanical strength, good wear resistance, its structure is stable, small energy required for adsorption, in order to be conducive to regeneration.Activated carbon for oilDecolorization, deodorization, gas separation, solvent recovery and air conditioning of fat, beverage, food and drinking water, used as catalyst or adsorbent for body and gas mask.Physical characteristics:Activated carbon is a kind of multi-aperture carbonization, has a very rich pore structure, has good adsorption characteristics, its adsorption by physical and chemicalAbsorbed from the force, the appearance of the color and lustre is black.Its composition in addition to the main carbon, but also contains a small amount of hydrogen, nitrogen, oxygen, its structure is shaped like a hexagon, due to the irregular hexagon structure, determine the characteristics of its body also incandescentand high surface area, each gram of activated carbon has the equivalent of 1000 square meters than the surface.www.chinactivecarbon.com/
Offline CLM  
#39 Gönderildi : 3 Kasım 2021 Çarşamba 08:39:02(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

There are two types of air pollutants: particulate matter and gaseous matter, among which gaseous pollutants account for the main part, accounting for more than 75% of the pollutants discharged into the atmosphere worldwide every year. Gaseous pollutants are divided into inorganic pollutants and organic pollutants.In terms of species, organic pollutants account for the vast majority.Of the 25 gases listed by the U.S. Environmental Protection Agency (EPA) as toxic There are two types of air pollutants: particulate matter and gaseous matter, among which gaseous pollutants account for the main part, accounting for more than 75% of the pollutants discharged into the atmosphere worldwide every year. Gaseous pollutants are divided into inorganic pollutants and organic pollutants.In terms of species, organic pollutants account for the vast majority.Of the 25 gases listed by the U.S. Environmental Protection Agency (EPA) as toxic emissions, 18 are organic.These 18 kinds of organic matter account for 74.2% of toxic gas emissions.It is estimated that more than 30 million tons of organic matter are released into the atmosphere worldwide every year, posing a serious threat to human health and plant and animal growth.Organic pollutants are mostly produced in industrial processes.granular activated charcoalThe general use of medicinal or chemical pure activated carbon. This kind of activated carbon particles is very fine, in powder form, the total surface area is particularly large, the adsorption capacity is very strong, the adsorption capacity is also very large, is the strongest kind of activated carbon adsorption force. But because the particles are too fine, the flow rate is too slow in the process of chromatography, the operation of pressure or decompression is needed, the procedure is more complicated, and the adsorption selectivity of various components is also poor, so it is less used in chromatography.
Medicinal or chemical pure activated carbon before leaving the factory after impurity treatment and metal limit inspection, can be used directly for chromatography. Industrial activated carbon is not processed by impurities before leaving the factory, often contains metal ions, affecting the separation effect, so it must be treated before use, its treatment methods are two.coal activated carbon supplierIn domestic has been eliminated. Specific surface area test unified the multi-point BET method at home and abroad, specific surface area measurement standards are developed at home and abroad is based on BET test method, please see our national standard (GB/T 19587-2004) - gas adsorption BET principle of solid material specific surface area measurement methods. Specific surface area testing is actually the more time-consuming jobs, as the adsorption capacity of sample is different, some sample testing may need to spend the whole dayTime, if the test process is not fully automated, the tester can not leave at any time, and should be highly focused, observe the dashboard, control the knob, a little careless will lead to the failure of the test process, which will waste a lot of valuable time of the tester.
F - Sorb 2400 specific surface tester is really able to BET method detection instruments (both direct comparison method), the more important F - Sorb 2400 specific surface tester is by far the only specific surface area of the fully automated intelligent testing equipment, the test results with the international high consistency, the stability is very good also, at the same time reduce the human error, improve accuracy test results.
Offline CLM  
#40 Gönderildi : 5 Kasım 2021 Cuma 03:44:10(UTC)
CLM


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 8.3.2021(UTC)
Mesajlar: 183
Hong Kong
Konum: 香港

In domestic has been eliminated. Specific surface area test unified the multi-point BET method at home and abroad, specific surface area measurement standards are developed at home and abroad is based on BET test method, please see our national standard (GB/T 19587-2004) - gas adsorption BET principle of solid material specific surface area measurement methods. Specific surface area testing is actually the more time-consuming jobs, as the adsorption capacity of sample is different, some sample testing may need to spend the whole dayTime, if the test process is not fully automated, the tester can not leave at any time, and should be highly focused, observe the dashboard, control the knob, a little careless will lead to the failure of the test process, which will waste a lot of valuable time of the tester.granular activated charcoal
F - Sorb 2400 specific surface tester is really able to BET method detection instruments (both direct comparison method), the more important F - Sorb 2400 specific surface tester is by far the only specific surface area of the fully automated intelligent testing equipment, the test results with the international high consistency, the stability is very good also, at the same time reduce the human error, improve accuracy test results.coal activated carbon supplier
Bu konudaki kullanıcılar
Guest
6 Sayfalar<1234>»
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)