Kinetic Study of the Decomposition of Cellulose to 5-Hydroxymethylfurfural in Ionic Liquid

BioResources

Lei Xu¹  Junxun Li¹  Suxiang Li²  Heng Zhang³  Jiahao Sun⁴ 

[1] China;Key Laboratory of Pulp and Paper Science and Technology of the Ministry of Education of China, Qilu University of Technology, Jinan, 250353, China;College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China;Qingdao University of Science and Technology;

关键词: Ionic liquid;    Cellulose;    5-HMF;    Kinetics;    Decomposition;   

DOI  :  10.15376/biores.11.2.4268-4280

来源: DOAJ

【 摘 要 】

The kinetics of cellulose decomposition in ionic liquid was investigated using microcrystalline cellulose as a raw material. Curve fitting of cellulose degradation kinetic data was carried out by MATLAB. Experimental results demonstrated that the cellulose decomposition rate constant, k1, was less than the constant for glucose decomposition to 5-hydroxymethylfurfural (5-HMF), k2, in the ionic liquid system, gaining a larger gap with increasing temperature. Results indicated that cellulose degradation is a slow reaction compared with glucose decomposition, which controls the speed of the overall reaction steps. CrCl3 increased the rate constant of cellulose and glucose degradation to almost the same degree, thus achieving simultaneous conversion of cellulose, glucose, and 5-HMF. Compared with other reaction systems, the ionic liquid system considerably reduced activation energy. Regression analysis of kinetic data indicated that the catalytic decomposition reactions of cellulose, glucose, and 5-HMF are all first-order reactions.

【 授权许可】

Unknown