National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Key Laboratory of Bio-refinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Science, Nanning, China
Received: 28 March 2019 Accepted: 10 December 2019
Different reaction conditions on the conversion of lignin and monophenol yield were investigated under the catalysis of (5% Mo)-Al2O3-ZrO2; the maximum conversion rate (78.9%) and monophenol yield (31.9%) were observed at 350 °C and 0.2 g catalyst using iso-propanol, in 45 min. The GC–MS analysis revealed that the main alkyl-substituted phenols are 4-ethyl-phenol (17.7%), 4-methyl-phenol (2.303%), phenol (1.878%), etc. The 1H NMR and FT-IR results indicated the presence of alkyl-substituted phenols in liquefaction products, and the formation mechanism of alkyl-substituted phenols was also proposed.