Hydro-liquefaction of woody biomass for bio-oil in supercritical solvent with [BMIM]Cl/NiCl2 catalyst

摘要

Thermochemical liquefaction characteristics of sawdust were explored with ethanol as solvent and [BMIM]Cl-NiCl2 as catalyst. The influences of liquefaction parameters including reaction temperature, residence time and hydrogen initial pressure on the sawdust conversion and products distribution were studied. The maximum bio-oil yield of 75.45 % and conversion of 86.01 % were obtained in ethanol at 320 °C and 30 min under 10 MPa hydrogen pressure. The chemical composition of bio-oil and gaseous products derived from optimized conditions was analyzed via GC-MS and GC. These results showed that the dominant compounds of light oil were carboxylic acid, esters and phenol and its derivatives. In addition, the gaseous components consisted of CO2, CO, methane, ethane and ethene.