Thermodynamic and Kinetic Desorption Analysis on Direct Air Capture of CO2 Gas Using Moisture Swing Sorbent

摘要

An anion exchangeable resin sorbent originated from amine wasused to captureandabsorb CO2 from atmospheric air. The sorbentis capable to absorb CO2 gas in dry location, though it releases CO2gas when it is exposed to water vapor or liquid water. The isotherm test on absorption providesthe evidence that the sorbent can act effectively at the very low concentrationof CO2. Its capacity of absorption in the form of carbonate ion is0.86 mol/kg, which is identical to nearing of 21 liter of CO2 gasunder 100 kPaand25?C. Langmuir equation detailed theabsorption isotherm better at higher saturation. The kinetic desorption of CO2spread over in a flat polypropylene sheet has been practiced by the welldeveloped modelsandexperiments. After that, the desorption coefficient,kinetic desorption parametersandstimulated energy are estimated with thatequationandmodel. Finally more experiments should be developed to find outthe exact reaction mechanism on this method with accumulating new information.