Characterization of liquefied products from corn stalk in the presence of polyhydric alcohols with acid catalysis

Atmospheric liquefaction technology has been used widely and is an effective way of biomass component utilization. In this paper, the liquefied products obtained from corn stalk using polyhydric alcohols 1,2-propanediol (PG) mixed diethylene glycol (DEG) through acid catalysis under atmosphere pressure were characterized by various analytical technologies. The results indicated that 39 kinds organic compounds present in bio-oil, among which most, phenols second, their relative contents 70.7% 25.6%, respectively. There also some acids, ethers, esters, ketones. More than 80% these had a carbon number less 25. Carbon nuclear magnetic resonance spectra (13C-NMR) showed different chemical shifts ? (ppm) corresponded to types. composition residue was complex contained certain amount large molecular substances difficult degrade. It required more severe pyrolysis conditions those stalk. Results X-Ray Diffraction (XRD) destruction crystalline structure carbohydrates cellulose molecules cracked, indicating degraded degree high.