Synthesis of Bio-Jet Fuel with High-Density and Low-Freezing-Point by Alkylation-Hydrodeoxygenation of Guaiacol and Cyclopentanol
Synthesizing high-density and low-freezing-point bio-jet fuel from lignocellulose can achieve green and low-carbon development.This paper reports a process route for the preparation of high-density and low-freezing-point fuels from the lignin derived guaiacol and the hemicellulose derived cyclopentanol by alkylation and hydrodeoxygenation.Different kinds of molecular sieve catalysts were screened,and USY with a silica to aluminum ratio of 100 was selected as the catalyst for the alkylation reaction.The reaction conditions were optimized and the conversion of guaiacol was 97.7％and the yields of the bicyclic and tricyclic products were 93.9％.The catalysts for hydrodeoxygenation were screened and a combination of HZSM-5 and Pt/C catalysts was selected.Under the condition of 260℃for 12 h,96.4％conversion of precursors,27.7％yield of bicyclic hydrocarbons and 63.8％yield of tricyclic hydrocarbons could be achieved.The final product has a density of 0.89 g/mL and a freezing point below-65℃.This study provides a simple and efficient method for the synthesis of high-performance jet fuel from lignocellulosic derivatives.
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