Metathesis and isomerization of n-butene and ethylene over WO3/SiO2 and MgO catalysts: Thermodynamic and experimental analysis
文献类型：期刊论文
| 作者 | Xu, Quan1; Jiang, Weili1; Huang, Ruli1; Li, Peidong2; Feng, Shuo1; Zhou, Guanglin1; Yu, Changchun1; Zhou, Hongjun1; Xu, Chunming1 |
| 刊名 | APPLIED CATALYSIS A-GENERAL
 |
| 出版日期 | 2016-05-05 |
| 卷号 | 517页码:227-235 |
| 关键词 | Metathesis Isomerization Thermodynamic Propylene Catalysis Tungsten Oxide |
| ISSN号 | 0926-860X |
| DOI | 10.1016/j.apcata.2016.03.009 |
| 文献子类 | Article |
| 英文摘要 | The rapid increase in the demand for propylene and its derivatives requires urgently developing propylene-producing technology. To better understand the complicated reactions on W-based metathesis catalyst for propylene production and further to clarify the involved reaction mechanism, thermodynamic calculation was first performed to analyze the gas mixture under different conditions theoretically. The analyzed reaction system is close to the ideal gas under typical reaction conditions. The detailed investigation of reactions under different conditions was then carried out using WO3/SiO2 and MgO catalysts in a fixed-bed tubular micro reactor. Experimental results together with calculation demonstrate that temperature plays the most important role in regulating metathesis reaction compared with other factors such as pressure, ethylene content and weight hourly space velocity (WHSV). Also, ethylene content in the feedstock affects a lot on metathesis process. With an optimized ratio of ethylene/n-butene, cross metathesis of 2-butene and ethylene is more likely to take place than that of 1-butene and 2-butene, and trans-2-butene has a generally better activity to react with ethylene than cis-2-butene due to the steric effect. On the other hand, isomerization is more independent on temperature compared with metathesis reaction. The consumption of 2-butene in metathesis will promote isomerization of 1-butene to 2-butene. Some extreme conditions such as higher pressures, larger ethylene contents and lower temperatures will provide opportunities for polymerization of ethylene. Based on the reaction analysis under different conditions, the reaction routes are summarized and a supposing mechanism for the formation of metallacyclobutane intermediate from trans/cis-2-butene is proposed. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS关键词 | OLEFIN-METATHESIS ; HETEROGENEOUS CATALYSTS ; CROSS-METATHESIS ; SKELETAL ISOMERIZATION ; PROPYLENE PRODUCTION ; OXIDE CATALYSTS ; WO3 CATALYSTS ; NOBEL LECTURE ; ACTIVE-SITES ; 2-BUTENE |
| WOS研究方向 | Chemistry ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000375162100025 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/170846]  |
| 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 |
| 通讯作者 | Zhou, Hongjun |
| 作者单位 | 1.China Univ Petr, Inst New Energy, State Key Lab Heavy Oil, Beijing 102249, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Quan,Jiang, Weili,Huang, Ruli,et al. Metathesis and isomerization of n-butene and ethylene over WO3/SiO2 and MgO catalysts: Thermodynamic and experimental analysis[J]. APPLIED CATALYSIS A-GENERAL,2016,517:227-235. |
| APA | Xu, Quan.,Jiang, Weili.,Huang, Ruli.,Li, Peidong.,Feng, Shuo.,...&Xu, Chunming.(2016).Metathesis and isomerization of n-butene and ethylene over WO3/SiO2 and MgO catalysts: Thermodynamic and experimental analysis.APPLIED CATALYSIS A-GENERAL,517,227-235. |
| MLA | Xu, Quan,et al."Metathesis and isomerization of n-butene and ethylene over WO3/SiO2 and MgO catalysts: Thermodynamic and experimental analysis".APPLIED CATALYSIS A-GENERAL 517(2016):227-235. |
入库方式： OAI收割
来源：大连化学物理研究所
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