Experimental Study on Cellulose Hydrolysis Using Active Carbon-Based and Carbon Nanotube-Based Solid Acid Catalysts

摘要

Three kinds of carbon-based solid acid catalysts were prepared to hydrolyze cellulose with activated carbon (AC) and multi-walled carbon nanotubes (MWCNTs) as the carrier. The prepared solid acid catalysts were characterized by BET, SEM, XRD, FTIR and TG analysis. The catalytic activities of these prepared solid acid catalysts for heterogeneously catalyzed hydrolysis of microcrystalline cellulose were further investigated. The catalysts bearing hydroxyl, carboxyl and sulfonic groups is thermally stable. Due to the amorphous multi-layered structure and the large number of defected structure, AC-based solid acid bears more acid groups than the MWCNTs-based catalyst, which hence showing higher activity for the catalytic hydrolysis of cellulose. AC-based solid acid exihibited two-fold higher catalytic efficiency than that of the MWCNTs-based solid acid catalysts.