Ru/CNT催化纤维二糖加氢制备山梨醇的机理及动力学  

Mechanism and kinetics of cellobiose hydrogenation catalyzed by Ru/CNT

作　　者：谭雪松[1,2] 庄新姝[1] 邓卫平[2] 张庆红[2] 王野[2] 袁振宏[1] 

机构地区：[1]中国科学院广州能源研究所,中国科学院可再生能源与天然气水合物重点实验室,广东广州510640 [2]厦门大学化学化工学院化学系,固体表面物理化学国家重点实验室,醇醚酯国家工程实验室,福建厦门361005

出　　处：《化工学报》2010年第10期2579-2584,共6页CIESC Journal

基　　金：国家自然科学基金项目(20625310, 20773099,20873110)~~

摘　　要：The production of chemicals or fuels from renewable biomass resources especially cellulose has attracted much attention because of the worldwide demand for less dependence on fossil resources.However,the direct utilization of cellulose is still a challenge because of its robust crystalline structure.Herein,the hydrogenation of cellobiose,a typical cellulose,over carbon nanotube supported ruthenium catalyst (Ru/CNT) was reported.The mechanism of cellobiose conversion was proposed and the kinetic equation was obtained.Based on the kinetic experiments carried out in the range 120—185℃ under 5.0 MPa H2,the reaction rate constants and activation energies of each reaction step in cellobiose hydrogenation were obtained with MATLAB,in which the activation energy for hydrolysis and hydrogenolysis of cellobiose was estimated as 147.1 kJ·mol-1 and 71.2 kJ·mol-1,respectively.The obtained kinetic model and some general rules on the catalytic hydrogenation of cellobiose may provide important data for efficient utilization of cellulose.The production of chemicals or fuels from renewable biomass resources especially cellulose has attracted much attention because of the worldwide demand for less dependence on fossil resources.However,the direct utilization of cellulose is still a challenge because of its robust crystalline structure.Herein,the hydrogenation of cellobiose,a typical cellulose,over carbon nanotube supported ruthenium catalyst （Ru/CNT） was reported.The mechanism of cellobiose conversion was proposed and the kinetic equation was obtained.Based on the kinetic experiments carried out in the range 120—185℃ under 5.0 MPa H2,the reaction rate constants and activation energies of each reaction step in cellobiose hydrogenation were obtained with MATLAB,in which the activation energy for hydrolysis and hydrogenolysis of cellobiose was estimated as 147.1 kJ·mol-1 and 71.2 kJ·mol-1,respectively.The obtained kinetic model and some general rules on the catalytic hydrogenation of cellobiose may provide important data for efficient utilization of cellulose.

关 键 词：钌 碳纳米管 纤维二糖 催化加氢 机理 动力学 

分 类 号：TQ032.41[化学工程]