Fibrous Polyethyleneimine‐Functionalized Cellulose Materials for CO2 Capture and Release

Abstract

AbstractPoly(ethyleneimine) (PEI) immobilized on support materials are valuable alternatives to aqueous amine solutions for carbon dioxide (CO2) capture from the atmosphere since the thermal desorption of CO2 from these materials usually requires less energy. Herein, fibrous PEI‐functionalized carrier systems based on cellulose, cellulose tosylate (CT), and cellulose carbamate (CC) are described. Branched PEI is used for functionalization since higher CO2 sorption capacities compared to linear PEIs can be achieved. Under wet conditions, a PEI‐functionalized nonwoven material has a sorption capacity of 0.026 mg CO2/mg adsorbent; complete and reversible CO2 desorption is accomplished at 80 °C.