Liquefaction of Lignocellulosic Biomass in Protonic Solvents

Abstract

Advantages of using organic solvents in solvolysis of lignocellulosic biomass, as compared to water, are the increase in the energy density of the product, and to selectively produce valuable compounds containing oxygen.The liquefactions of cellulose, rice straw, and red pine were conducted in a batch reaction system in the presence of solid catalysts and several protonic solvents, such as methanol and ethylene glycol. In the solvolysis of cellulose in methanol, methyl-glucopyranosides were the main products formed via the addition of H + and OCH3 -in the presence of a solid catalyst. The decomposition rates of cellulose in various solvents decreased in the order of water > methanol > ethylene glycol > 1-butanol. This may suggest that the solvents with large self-dissociation constant (K SH) enhance the solvolysis of cellulose. In addition, the pore structure and acidity of a solid acid catalyst and type of lignocellulosic biomass also affected the solvolysis. The maximum liquefaction rates of rice straw and red pine in ethylene glycol using a sulfated zirconia catalyst at 453 K for 6 h were ca. 78.7% and 97.5%, respectively.

Evaluation of Polyurethane Foam Derived from the Liquefied Driftwood Approaching for Untapped Biomass

“…To resolve this problem, this study focused on examining the potential of driftwood use and the conversion of driftwood to make a biodegradable plastic [11,12]. Out of various possibilities of utilization for biodegradable plastic, this study investigated the optimized liquefaction process [13][14][15] of driftwood to make polyurethane foam (PUF) [16]. Currently, most products in the large PUF market are synthesized with oil in order to produce large quantities and maintain high quality.…”