Amine-Functionalized Cellulose as Promising Materials for Direct CO2 Capture: A Review

Herein, the potential use of amine-functionalized cellulose as a low-cost and sustainable sorbent for CO2 capture is reviewed. This literature analysis specifically highlights various advanced preparation methods used to synthesize functionalized cellulose supports with an enhanced affinity for the sorption of CO2 molecules. The mechanism of cellulose functionalization with different types of amines is explicitly detailed, considering amine impregnation and grafting to selectively chemisorb CO2 gas with or without the presence of moisture and at different temperatures and pressures. The final section critically discusses the main limitations to scaling up amine-functionalized cellulose sorbents, particularly issues related to amine oxidation, stability, and degradation.