Facile biphasic catalytic process for conversion of monoterpenoids to tricyclic hydrocarbon biofuels  

作　　者：Shaoqu Xie Trong HHuynh Peiyong Qin Tianwei Tan Hongfei Lin 

机构地区：[1]The Gene and Linda Voiland School of Chemical Engineering and Bioengineering,Washington State University,Pullman,WA 99164 [2]National Energy Research and Development Center for Biorefinery,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Journal of Energy Chemistry》2020年第10期42-50,共9页能源化学（英文版）

摘　　要：Terpenoids have drawn much attention to scientists in synthesizing high-performance bio-jet fuels due to their ring structures,which feature potential high densities.Here,a facile biphasic catalytic process has been developed for the production of high-density tricyclic hydrocarbon biofuels from a monoterpenoid,1,8-cineole,using sulfuric acid(H2SO4)as the homogeneous catalyst.A^100%conversion of 1,8-cineole and a>40%carbon yield of cyclic dimers were achieved at 100℃within two hours.The mechanism for the acid-catalyzed conversion of 1,8-cineole to cyclic hydrocarbon dimers were explored.In particular,the formation of the diene intermediates and the following dimerization of dienes was essential to synthesize tricyclic terpene dimers.The biphasic catalytic process accelerated the deoxygenation rate and enabled the dimerization with the aid of organic solvent while controlling the reaction rates to avoid the formation of solid residues.Moreover,this process also facilitated the product separation by organic solvent extraction while enabling easy recycle of the homogenous catalysts.

关 键 词：CINEOLE High-density biofuels Biphasic catalytic process Diels-Alder reaction DEHYDRATION 

分 类 号：TQ517.2[化学工程] TQ426