The Study of the Feasibility of Joint Production of Jet Fuel and Bioethanol from Biomass

The cost of pretreatment and the inhibitors from the lignin and polysaccharide decomposed hinder the process of bio-ethanol commercialization. Develop a one-pot process which refinery the lignin first to jet fuel using thermochemistry ways, and then use the residual (contain cellulose main portion) to converse bio-ethanol was benefits a lot. The enzyme hydrolysis and fermentation efficency of the left substrate were analyzed. After apple wood catalyzed by Ni and Ru/C for jet-fuel production the surface area and accessibility of cellulose increased and the Cr. I of cellulose I was improved, which led to the improvement of the efficency of enzyme hydrolysis. After catalyzed by Ni, the substrate enzymatic hydrolysis increase from 5.8% (the raw apple wood) to 88%. Low Ni concentration (0.4g/l ) was not inhibit the enzyme hydrolysis of the residual, but not the same effect of Ru/C. Ni was obvious inhibitor for yeast fermentation. Ru/C was not toxic to yeast fermentation in YPD. When carried on Q-SSCombF, the substrate ( including catalyst) inhibited a lot of yeast fermentation even catalyzed by Ru/C. When separate hydrolysis and fermentation was carried, the ethanol conversion of the fermentation of the substrate catalytic by Ni was improved from 33% to 75% and the result of Ru/C catalytic substrate was increased from 25% to 73%. Carry on jet-fuel and bio ethanol co-production from biomass was feasible, the catalyst in substrates was the main point of the process.