Catalytic cascade acetylation-alkylation of biofuran to C_(17)diesel precursor enabled by a budget acid-switchable catalyst  

作　　者：Chuanhui Li Yuanzhong Li Xiaoxiang Luo Zhengyi Li Heng Zhang Hu Li Song Yang 

机构地区：[1]State Key Laboratory Breeding Base of Green Pesticide&Agricultural Bioengineering,Key Laboratory of Green Pesticide&Agricultural Bioengineering,Ministry of Education,State-Local Joint Laboratory for Comprehensive Utilization of Biomass,Center for R&D of Fine Chemicals,Guizhou University,Guiyang 550025,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第6期171-179,共9页中国化学工程学报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(21666008,21908033,21576059);Fok Ying-Tong Education Foundation(161030);Guizhou Science&Technology Foundation([2018]1037);Program of Introducing Talents of Discipline to Universities of China(111 Program,D20023)。

摘　　要：Lignocellulosic biomass is a promising feedstock for the synthesis of value-added chemicals and biofuels.However,one of the biggest challenges for producing high-quality diesel fuels is the lack of sufficient carbon-chain length in biomass derivatives.In this study,a C_(17)diesel precursor 1,1,1-tris(5-methyl-2-f uryl)ethane(TEMF)with a yield of ca.70%was synthesized from the cascade acetylation-hydroxyalkyla tion/alkylation of bio-based 2-methylfuran(MF)with acetic anhydride(AA)catalyzed by acid-treated montmorillonite with enhanced acidity and improved porosity.The catalytic mechanism of the cascade reaction process was investigated over different types of acid species(Br?nsted acid and Lewis acid),and the influence of in situ formed acetic acid was also examined.A synergistic effect was observed to enable the synthesis of TEMF from the trimerization of MF with AA,in which Lewis acid and weak Br?nsted acid species mainly catalyze the acetylation and hydroxyalkylation processes,while the subsequent alkylation step is mainly catalyzed by strong Br?nsted acid.

关 键 词：Biomass DIESEL Catalysis Biofuranic compound Acetylation-alkylation 

分 类 号：TE667[石油与天然气工程—油气加工工程] TQ426[化学工程]