文献类型：期刊文献

英文题名：Conversion of raw lignocellulosic biomass into branched long-chain alkanes through three tandem steps

作者：Li, Chunrui[1];Ding, Daqian[1];Xia, Qineng[1];Liu, Xiaohui[1];Wang, Yanqin[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Res Inst Ind Catalysis, 130 Meilong Rd, Shanghai, Peoples R China

年份：2016

卷号：9

期号：13

起止页码：1712

外文期刊名：CHEMSUSCHEM

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000380336800022)】；

基金：The research was sponsored financially by the National Natural Science Foundation of China (No. 91545103 and 21273071) and the Science and Technology Commission of Shanghai Municipality (13JC1401902).

语种：英文

外文关键词：biomass; branched alkanes; fuels; hydrodeoxygenation; tandem reactions

摘要：Synthesis of branched long-chain alkanes from renewable biomass has attracted intensive interest in recent years, but the feedstock for this synthesis is restricted to platform chemicals. Here, we develop an effective and energy-efficient process to convert raw lignocellulosic biomass (e.g., corncob) into branched diesel-range alkanes through three tandem steps for the first time. Furfural and isopropyl levulinate (LA ester) were prepared from hemicellulose and cellulose fractions of corncob in toluene/water biphasic system with added isopropanol, which was followed by double aldol condensation of furfural with LA ester into C-15 oxygenates and the final hydrodeoxygenation of C-15 oxygenates into branched long-chain alkanes. The core point of this tandem process is the addition of isopropanol in the first step, which enables the spontaneous transfer of levulinic acid (LA) into the toluene phase in the form of LA ester through esterification, resulting in LA ester co-existing with furfural in the same phase, which is the basis for double aldol condensation in the toluene phase. Moreover, the acidic aqueous phase and toluene can be reused and the residues, including lignin and humins in aqueous phase, can be separated and carbonized to porous carbon materials.