Can carbon dioxide be adsorbed by activated carbon?
Thread Content
Can carbon dioxide be adsorbed by activated carbon? Does anyone know the amount of carbon dioxide that can be adsorbed at room temperature, as well as the temperature required for desorption?
CO2 is best adsorbed using molecular sieves
There are many relevant factors regarding volume, composition, pressure, and the selection of adsorbents
Activated carbon is used in gas-phase adsorption applications, for the adsorption and recovery of organic solvents such as benzene, toluene, xylene, propylene, oil gases, and CS2. Cigarette filters, odor removal in renovation projects, indoor air purification (removal of formaldehyde, benzene, etc.), purification of industrial gases (such as CO2, N2, etc.). Production in the petrochemical industry, natural gas purification, desulfurization, deodorization, and treatment of waste gases. Air purification and deodorization in the biochemical and paint industries, underground facilities, leather factories, and animal breeding sites. Odor absorption of flue gas, absorption of sulfides, removal of mercury vapor, and reduction of dioxin formation.
I’ve also looked up some information; molecular sieves have a very strong ability to absorb water. I’m not sure what effect they have on carbon dioxide, and besides, their desorption temperature is high
The air separation industry generally uses molecular sieves to absorb CO2, and thermally regenerates the nitrogen gas to desorb carbon dioxide from the molecular sieves
PSA can remove CO2; the PSA we use is designed for CO2 removal, and its performance is fairly satisfactory. In terms of water treatment technology, Tianyi from the Southwest Research Institute does a better job; it’s hard to say the same for other companies.
Silica gel and molecular sieves are mainly used for CO2 adsorption
I’m facing a problem right now and I’d appreciate it if everyone could help analyze it. The carbon content in the gas after decarburization is reduced to below 20 PPm, but once this gas enters the dehydration system (which uses molecular sieves and activated carbon as packing materials), the carbon dioxide concentration rises to over 1000 PPm. After ruling out the possibility of pressure issues in the process, I initially suspect that before the plant was put into operation, gas that hadn’t gone through the decarburization system entered the dehydration system, causing the molecular sieves and activated carbon to absorb carbon dioxide. As a result, the decarburization system works properly after startup, but the carbon dioxide level remains too high in the gas after dehydration. I hope experts can help analyze this issue