Modification of coconut shell activated carbon and purification of volatile organic waste gas acetone

The impregnation method was used to modify the coconut shell activated carbon, and the modified activated carbon was applied to purify the simulated exhaust gas of acetone. The experiment first discussed the influence of modification conditions on activated carbon’s adsorption effect and determined the best modification conditions. Specifically, the adsorption operation conditions such as intake time, intake flow rate, intake concentration, and adsorption temperature were investigated. Then, characterization methods such as BET and FTIR were used to study the thermodynamic and kinetic processes of activated carbon’s adsorption process by acetone and the in-depth analysis of the purification mechanism. The results show that a 1% KOH modified coconut shell activated carbon has the highest adsorption performance. Both the Langmuir adsorption isotherm model and the Bangham kinetic model can better fit the adsorption process. Experimental outcomes will support the theoretical approach for the research of coconut shell activated carbon in acetone purification. Purification of a volatile organic compound of acetone using the modified coconut shell-based activated carbon materials