How does activated carbon work and what does an activated carbon producer do?

Activated carbon is a very fine carbon particle with a large surface area, and there are even finer pores in the carbon grain - capillaries. This capillary has a strong adsorption capacity and is in full contact with gases (impurities) due to the large surface area of the carbon particles. When these gases (impurities) touch the capillaries, they are adsorbed and purified.

Activated carbon, sulfonated coal, zeolite, coke, etc. are commonly used adsorbents in water treatment, and the activated carbon lattice forms developed pores of different shapes and sizes after activation, which greatly increases the specific surface area and improves the adsorption capacity. The effective radius of the fine pores of activated carbon is generally 1-10000nm, the radius of small pores is less than 2nm, the radius of transition pores is generally 2-100nm, and the radius of macropores is 100-10000nmThe pore volume is generally, and the transition pore area is generally; The macropore volume is generally.

In terms of elemental composition, more than 80%-90% of activated carbon is composed of carbon, which is why activated carbon is a hydrophobic adsorbent. In addition to carbon elements, activated carbon also contains two types of admixtures: one is chemically bound elements, mainly oxygen and hydrogen, these elements are left in the carbon due to incomplete carbonization, or in the activation process, foreign non-carbon elements are chemically combined with the surface of activated carbon, such as when activated with water vapor, the surface of activated carbon is oxidized or oxidized by water vapor; Another type of admixture is ash, which is the inorganic part of activated carbon, which is composed of several elements of activated carbon.

Methods for removing formaldehyde.

First, ventilation. It's not a simple ventilation, it's a long-lasting ventilation. Formaldehyde is released for a long time, three to fifteen years. So we have to fight a protracted battle, and we have to pay attention to the air circulation every day.

Second, activated carbon. Although most activated carbons have good absorption capacity, it will not take long to reach saturation if they rely only on absorption to control pollution. At this time, the activated carbon does not return, but can not play a role in removing formaldehyde, but will become a pollution source to release the absorbed formaldehyde.

Therefore, when it is generally used for about 3 months, it is recommended to throw away the old activated carbon and replace it with new carbon, or choose a new type of activated carbon with stronger performance, such as coconut carbon, which will last much longer.

Third, Ye Guangni. It is a new type of material, different from activated carbon, activated carbon can only adsorb, after a period of time, the adsorption will be saturated, release harmful substances again, produce secondary pollution, Ye Guangni is not only adsorption, it can decompose harmful substances after adsorption, will not be released again, does not need to be exposed to the sun, can be permanently decomposed, no secondary pollution, can be used for 3 years.

Fourth, green plants remove formaldehyde, which uses the principle of photochemistry to purify the air, but the effect is not great. When the formaldehyde concentration is too high, it will cause the green plants to die easily.

Fifth, photophyll spray, which can be sprayed on the furniture to decompose and remove, can be directly decomposed without ultraviolet light, and the removal rate is greatly high.

Nitrogen dioxide itself has a color, and when you put activated carbon in nitrogen dioxide, the color changes, of course, the concentration of nitrogen dioxide is low.

The pigment you are talking about is the thing that shows color, and nitrogen dioxide itself has color, which is nitrogen dioxide, which is a thing. It's like the copper ions are blue, and when the copper ions are chemically precipitated, the water has no product.

There are two forces for the adsorption of chemical carbon: one is physical adsorption and the other is chemical adsorption.

Physical adsorption is carried out by the micropores of activated carbon, while chemical adsorption is due to the functional groups on the surface of activated carbon.

Activated carbon is not the larger the specific surface area, the better the formaldehyde adsorption. Some activated carbons have a large specific surface area, and the iodine adsorption value and methylene blue adsorption value are very high, but the adsorption efficiency of acetaldehyde in some gases, such as formaldehyde, ammonia, and cigarettes, is only 40% 60%, while some are only 20% 30%.

Why is that?

In addition to the specific surface area, the physical adsorption performance of activated carbon is also closely related to the micropore size of activated carbon. If the micropore size of activated carbon is close to the diameter of a certain gas, then it has a strong adsorption force for this gas, and it is not easy to desorb after adsorption. To increase the number of micropores of a specific size, it is necessary to control the processing conditions or process of the activated carbon.

This technique is more difficult to control.

For gases like formaldehyde, acetaldehyde, and ammonia, because of their low boiling point and less obvious polarity, it is difficult to increase the specific size of activated carbon micropore technology, so it is difficult to have a good effect only by physical adsorption of activated carbon. Especially in the case of the coexistence of other gases, activated carbon preferentially adsorbs other gases that are better adsorbed, and it is less adsorption for formaldehyde, etc., and it is easier to desorb.

The adsorption principle of activated carbon includes not only physical adsorption, but also chemical adsorption. There are many functional groups on the surface of activated carbon, and the adsorption power of different functional groups on a certain gas is also different. It is necessary to increase the specific functional groups on the surface of the activated carbon in order to increase the adsorption power of the activated carbon to a certain gas.

There are many ways to increase the specific functional groups of activated carbon, the most commonly used is the addition of chemicals or catalysts to activated carbon, and the chemical process conditions can also be modified.

Appropriate and good activated carbon additives and modification methods can improve the adsorption efficiency of activated carbon for specific gases several times to dozens of times. Activated carbon loading and modification have become a hot research topic in recent years.

If you want to know more about activated carbon additives and modifiers, you can log in to Chengying Environmental Protection Technology. The company specializes in the production of activated carbon additives and modifiers. You can also leave me a message.

Generally, the following methods are used to remove formaldehyde:

1.Open the window and put some plants that can absorb formaldehyde.

2.Open the doors of drawers, wardrobes, cabinets, etc., and put some long-term adsorption of Ye Guang mud, which can adsorb and decompose formaldehyde in the cabinet, and it can be used for 3 years better than activated carbon.

3.You can put a fan to enhance air convection, photocatalyst, photophyll and the like can decompose formaldehyde when it comes to light, and it is used in industry to remove formaldehyde, and photophyll will be much better.

4.It is better to open windows in summer than in winter, and it is better to open windows during the day than at night (because the higher the temperature, the greater the humidity, the faster the formaldehyde will disperse).

1. Apply the physical characteristics of porous and the principle of mutual attraction to effectively absorb harmful gases in the air.

2. It has a very strong purification effect by absorbing pollutant substances.

3. The source of pollution, such as the diffusion of formaldehyde, can be properly controlled.

4. It has the effect of continuously purifying harmful air.

There are many fine voids on its surface, and those voids have an adsorption effect.

The work mainly includes: (1) operating conveyors and crushers to crush and purify carbon-containing materials and remove impurities; (2) Operate carbonization and activation equipment, add activators, regulate process parameters such as temperature, pressing force per mu, activation speed, etc., to make activated carbon; (3) Use screening, pickling, washing and other equipment to post-process activated carbon; (4) Operate wood distillation equipment, control wood distillation temperature and morning hood degree and other process parameters, and make by-products such as wood vinegar and wood tar; (5) Operate the wood tar distillation column to control the process parameters such as temperature and vacuum degree to make wood tar, antioxidants and other by-products.

The following types of work are classified as occupations:

Wood Distiller (08-090), Wood Tar Worker (08-091), Activated Carbon Fabric Chemical (08-092), Activated Carbon Activated Chemical (08-093), Activated Carbon Pickling Worker (08-094), Activated Carbon Dryer (08-095).

The work mainly includes: (1) operating conveyors and crushers to crush and purify carbon-containing materials and remove impurities; (2) Operate carbonization and activation equipment, add activators, regulate process parameters such as temperature, pressing force per mu, activation speed, etc., to make activated carbon; (3) Use screening, pickling, washing and other equipment to post-process activated carbon; (4) Operate wood distillation equipment, control wood distillation temperature and morning hood degree and other process parameters, and make by-products such as wood vinegar and wood tar; (5) Operate the wood tar distillation column to control the process parameters such as temperature and vacuum degree to make wood tar, antioxidants and other by-products.

The following types of work are classified as occupations:

Wood Distiller (08-090), Wood Tar Worker (08-091), Activated Carbon Fabric Chemical (08-092), Activated Carbon Activated Chemical (08-093), Activated Carbon Pickling Worker (08-094), Activated Carbon Dryer (08-095).

The work mainly includes: (1) operating conveyors and crushers to crush and purify carbon-containing materials and remove impurities; (2) Operate carbonization and activation equipment, add activators, regulate process parameters such as temperature, pressing force per mu, activation speed, etc., to make activated carbon; (3) Use screening, pickling, washing and other equipment to post-process activated carbon; (4) Operate wood distillation equipment, control wood distillation temperature and morning hood degree and other process parameters, and make by-products such as wood vinegar and wood tar; (5) Operate the wood tar distillation column to control the process parameters such as temperature and vacuum degree to make wood tar, antioxidants and other by-products.

The following types of work are classified as occupations:

Wood Distiller (08-090), Wood Tar Worker (08-091), Activated Carbon Fabric Chemical (08-092), Activated Carbon Activated Chemical (08-093), Activated Carbon Pickling Worker (08-094), Activated Carbon Dryer (08-095).

The work mainly includes: (1) operating conveyors and crushers to crush and purify carbon-containing materials and remove impurities; (2) Operate carbonization and activation equipment, add activators, regulate process parameters such as temperature, pressing force per mu, activation speed, etc., to make activated carbon; (3) Use screening, pickling, washing and other equipment to post-process activated carbon; (4) Operate wood distillation equipment, control wood distillation temperature and morning hood degree and other process parameters, and make by-products such as wood vinegar and wood tar; (5) Operate the wood tar distillation column to control the process parameters such as temperature and vacuum degree to make wood tar, antioxidants and other by-products.

The following types of work are classified as occupations:

Wood Distiller (08-090), Wood Tar Worker (08-091), Activated Carbon Fabric Chemical (08-092), Activated Carbon Activated Chemical (08-093), Activated Carbon Pickling Worker (08-094), Activated Carbon Dryer (08-095).

The work mainly includes: (1) operating conveyors and crushers to crush and purify carbon-containing materials and remove impurities; (2) Operate carbonization and activation equipment, add activators, regulate process parameters such as temperature, pressing force per mu, activation speed, etc., to make activated carbon; (3) Use screening, pickling, washing and other equipment to post-process activated carbon; (4) Operate wood distillation equipment, control wood distillation temperature and morning hood degree and other process parameters, and make by-products such as wood vinegar and wood tar; (5) Operate the wood tar distillation column to control the process parameters such as temperature and vacuum degree to make wood tar, antioxidants and other by-products.

The following types of work are classified as occupations:

Wood Distiller (08-090), Wood Tar Worker (08-091), Activated Carbon Fabric Chemical (08-092), Activated Carbon Activated Chemical (08-093), Activated Carbon Pickling Worker (08-094), Activated Carbon Dryer (08-095).