The practice of catalytic liquefaction of biomass converts biomass resources using sulfuric acid as catalyst is not conducive to industrial production.In order to overcome this shortcomings,the liquefaction of corn stalk catalyzed by phosphotungstic acid in the reaction media of polyethylene glycol 400(PEG400) was studied.The effects of liquid concentration,reaction time,reaction temperature and catalyst dosage were investigated by single-factor test and orthogonal test.Results showed that liquefaction rate...