The gas-phase applications of coal based activated carbon mainly include solvent recovery, oil and gas recovery, indoor gas purification, toxic gas protection, and flue gas purification.
1. Solvent recovery
The industrial application of using activated carbon adsorption method to purify and recover organic components in exhaust gas is relatively mature. It is very effective in recovering volatile organic compounds such as benzene, ethyl acetate, chloroform, etc. At present, China has successfully applied activated carbon adsorption technology for solvent recovery in many industries such as printing, painting, rubber, film, and papermaking.
2. Oil and gas recovery
To prevent fuel waste and environmental pollution caused by gasoline volatilization, high-performance activated carbon is used for selective adsorption of oil and gas, achieving adsorption and recovery of oil vapor.
3. Indoor air purification
Activated carbon has strong adsorption capacity for volatile organic compounds such as benzene, formaldehyde, alkanes, and inorganic gases such as SO ₂, H ₂ S, NOx, CO, etc. It is currently an important adsorbent material in indoor air purifiers. The content of air purification mainly includes deodorization, deodorization, dehumidification, Freon and ozone removal.
4. Anti toxic protection
Anti toxic protection is one of the earliest gas-phase application fields of activated carbon. Compared with the early days, the performance of activated carbon for anti-virus protection has been greatly improved. In addition to protecting against toxic gases, it is also used in some fields such as atomic reactors or the application of radioactive substances. For adsorbing and removing radioactive gases and vapors, and preventing radioactive pollution.
5. Smoke purification
Activated carbon used for flue gas desulfurization is called activated carbon, which is a coal based activated carbon with low specific surface area and high strength. Various harmful substances (such as SO ₂ NOx 、 Smoke particles, mercury, dioxins, furans, heavy metals, volatile organic compounds, and other trace elements can be removed and purified simultaneously.
