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题名: Selective Production of 1,2-Propylene Glycol from Jerusalem Artichoke Tuber using Ni-W2C/AC Catalysts
作者: Zhou, Likun1, 2;  Wang, Aiqin1;  Li, Changzhi1;  Zheng, Mingyuan1;  Zhang, Tao1
关键词: biomass ;  carbides ;  heterogeneous catalysis ;  reaction mechanisms ;  tungsten
刊名: CHEMSUSCHEM
发表日期: 2012
DOI: 10.1002/cssc.201100545
卷: 5, 期:5, 页:932-938
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: A series of Ni-promoted W2C/activated carbon (AC) catalysts were investigated for the catalytic conversion of Jerusalem artichoke tuber (JAT) under hydrothermal conditions and hydrogen pressure. Even a small amount of Ni could greatly promote the conversion of JAT to 1,2-propylene glycol (1,2-PG), whereas the pure W2C/AC catalyst resulted in the selective formation of acetol. The product distribution profiles involving the reaction temperature, time, and H2 pressure indicated that 1,2-PG formed as a result of acetol hydrogenation, which was catalyzed by Ni. Thus, there was a synergy between W2C and Ni, and the best performance yielded 38.5?% of 1,2-PG over a 4?% Ni20?% W2C/AC catalyst at 245 degrees C, 6 MPa H2, and 80 min. To understand the reaction process, some important intermediates, such as inulin, fructose, acetol, glyceraldehyde, and 1,3-dihydroxyacetone, were used as the feedstock. Based on the product distributions derived from these intermediates, a reaction pathway was proposed, where JAT was first hydrolyzed into a mixture of fructose and glucose under the catalysis of H+, then the sugars underwent a retro-aldol reaction followed by hydrogenation catalyzed by NiW2C.
关键词[WOS]: ETHYLENE-GLYCOL ;  CELLULOSE CONVERSION ;  SUPERCRITICAL WATER ;  CARBIDE CATALYSTS ;  HYDROLYSIS ;  KINETICS ;  GLUCOSE
语种: 英语
WOS记录号: WOS:000303854800017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143066
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.CAS, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Zhou, Likun,Wang, Aiqin,Li, Changzhi,et al. Selective Production of 1,2-Propylene Glycol from Jerusalem Artichoke Tuber using Ni-W2C/AC Catalysts[J]. CHEMSUSCHEM,2012,5(5):932-938.
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