Development of Inexpensive Cellulose-Based Sorbents for Carbon Dioxide

Abstract

Aqueous amine solutions are benchmark solvents for CO 2 capture and their operational drawbacks are well-known. In order to overcome these problems, the support of amines on solid materials appears as an option for CO 2 capture. Cellulose is a versatile and low-cost material that can be used as a support. This study reports chemical modification of cellulose fibers extracted from rice husk with different amines and their potential for CO 2 capture. The obtained compounds were characterized by different techniques. The CO 2 sorption capacity was gravimetrically assessed in a Magnetic Suspension Balance. Quantum mechanical simulations and experimental results revealed that-NH-and-NH 2 represent major working sites of the employed compounds. The best result for CO 2 sorption was attained for the amine-modified cellulose CL-D-400 with a sorption capacity of 409 µmol CO 2 /g at 1 bar and 1091 µmol CO 2 /g at 10 bar with amine concentrations as low as 2 × 10-6 mol/mg.

Enhanced Gas Separation Prowess Using Functionalized Lignin-Free Lignocellulosic Biomass/Polysulfone Composite Membranes

“…This characteristic band at 2870 cm −1 indicates the appearance of N−H bonds in DPC-NH 2 and hence proves the successful amine-functionalization of DPC. Additionally, the N-H primary amine band is attributed to the two bands on the broad O-H band region at 3360 and 3470 cm −1 [ 37 ]. These peaks are indicating a successful functionalization of amine groups on the surface of the DPC.…”