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.