碳纳米管担载纳米Ir催化生物质基乙酰丙酸合成γ-戊内酯(英文)  

Catalytic conversion of biomass-derived levulinic acid into γ-valerolactone using iridium nanoparticles supported on carbon nanotubes

作　　者：杜贤龙[1,2] 刘永梅[1] 王建强[2] 曹勇[1] 范康年[1] 

机构地区：[1]复旦大学化学系 上海市分子催化和功能材料重点实验室,上海200433 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《催化学报》2013年第5期993-100,共9页

基　　金：supported by the National Natural Science Foundation of China(21273044));the Program for New Century Excellent Talents in University(NCET-09-0305);Science&Technology Commission of Shanghai Municipality(08DZ2270500)~~

摘　　要：以碳纳米管(CNTs)担载Ir纳米粒子为催化剂进行生物质基平台化合物乙酰丙酸(LA)选择加氢制备γ-戊内酯(GVL)的研究,并利用X射线衍射、X射线光电子能谱和透射电镜表征了使用前后的Ir/CNT催化剂,探讨了影响LA催化加氢制GVL反应性能的因素和该反应的可能路径.结果表明,与Ru,Rh和Pd等传统铂族金属相比,Ir/CNT催化剂不但可在温和条件下(50oC,2.0MPa,H2)实现LA至GVL的完全转化,且可对多类直接源于生物质水解的含等量LA/甲酸的"真实"体系实现GVL的高效选择合成.A new method has been developed for the catalytic conversion of biomass-derived levulinic acid (LA) into γ-valerolactone (GVL) with molecular hydrogen (H2) using a series of heterogeneous noble metal catalysts. Excellent yields of the GVL were obtained under mild reaction conditions of 50°C and 2 MPa of H2 using iridium nanoparticles supported on carbon nanotubes (Ir/CNT). It is note-worthy that the reaction proceeded smoothly in the presence of formic acid (FA, co-produced with LA in equimolar amounts during the acid-mediated hydrolysis of lignocellulosic biomass). Further-more, the FA remained intact, highlighting the practical advantages of this process for the conven-ient and cost-effective processing of a biomass-derived LA/FA solution. The method is effective for the simultaneous production of GVL and FA from a wide variety of renewable biomass resources.

关 键 词：生物质 乙酰丙酸 γ-戊内酯 加氢 铱 碳纳米管 

分 类 号：O623.624[理学—有机化学] O643.32[理学—化学]