Hydrogenation of methyl acetate to ethanol over a highly stable Cu/SiO2 catalyst: Reaction mechanism and structural evolution
文献类型：期刊论文
| 作者 | Zheng, Yanping2; Shen, Wenjie1; Huang, Xiumin1; Ma, Meng1; Miao, Shu1; Chen, Mingshu2 |
| 刊名 | APPLIED CATALYSIS A-GENERAL
 |
| 出版日期 | 2017-02-05 |
| 卷号 | 531页码:79-88 |
| 关键词 | Cu/SiO2 catalyst Core-shell structure Methyl acetate Hydrogenation Stability |
| 英文摘要 | A Cu/SiO2 catalyst with a core-shell structure was found to be highly active and stable for the hydrogenation of methyl acetate to ethanol during 96 h reaction test at 523 K; MA conversion reached at 95% while the selectivity towards the major products (ethanol and methanol) approached similar to 95%. Structural analysis revealed that most copper particles in the hydrogen-reduced Cu/SiO2 catalyst had sizes of 3-7 nm and were coated with a thin layer of silica, forming a core-shell structure. The average size of copper particles and the core-shell structure kept unchanged in the spent catalyst, but the Cu+/(Cu-0 + Cu+) ratio increased during the course of reaction, probably because of the electronic interaction between copper surface and methyl acetate under the reaction conditions. Mechanistic and kinetic studies have identified that ethyl acetate was formed through trans-esterification of initially produced ethanol with methyl acetate, while the subsequent hydrogenation of ethyl acetate to ethanol proceeded much faster. The Cu+/(Cu-0 + Cu+) ratio played a crucial role in reaction network; MA could adsorb equally on Cu-0 and Cu+ sites while the activation of molecular hydrogen occurs only on the Cu-0 site. Therefore, a rather stable performance could be attained with the increase in the Cu+/(Cu-0 + Cu+) ratio during the course of reaction as long as the reaction is kinetically controlled by MA adsorption. The outstanding stability of the Cu/SiO2 catalyst was ascribed to a combination of geometric and electronic effect. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine |
| 类目[WOS] | Chemistry, Physical ; Environmental Sciences |
| 研究领域[WOS] | Chemistry ; Environmental Sciences & Ecology |
| 关键词[WOS] | DIMETHYL ETHER CARBONYLATION ; PRECIPITATION-GEL METHOD ; SILICA-SUPPORTED COPPER ; GLYCEROL HYDROGENOLYSIS ; ETHYLENE-GLYCOL ; H-MORDENITE ; CHEMOSELECTIVE HYDROGENATION ; ACIDIC ZEOLITES ; OXALATE ; PERFORMANCE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000392680500010 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/151883]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Yanping,Shen, Wenjie,Huang, Xiumin,et al. Hydrogenation of methyl acetate to ethanol over a highly stable Cu/SiO2 catalyst: Reaction mechanism and structural evolution[J]. APPLIED CATALYSIS A-GENERAL,2017,531:79-88. |
| APA | Zheng, Yanping,Shen, Wenjie,Huang, Xiumin,Ma, Meng,Miao, Shu,&Chen, Mingshu.(2017).Hydrogenation of methyl acetate to ethanol over a highly stable Cu/SiO2 catalyst: Reaction mechanism and structural evolution.APPLIED CATALYSIS A-GENERAL,531,79-88. |
| MLA | Zheng, Yanping,et al."Hydrogenation of methyl acetate to ethanol over a highly stable Cu/SiO2 catalyst: Reaction mechanism and structural evolution".APPLIED CATALYSIS A-GENERAL 531(2017):79-88. |
入库方式： OAI收割
来源：大连化学物理研究所
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