甲烷氧化偶联
催化作用
甲烷
反应机理
偶联反应
联轴节(管道)
化学工程
气相
材料科学
纳米纤维
相(物质)
多相催化
物理化学
化学
纳米技术
复合材料
有机化学
工程类
作者
Canan Karakaya,Huayang Zhu,Bahman Zohour,Selim Şenkan,Robert J. Kee
出处
期刊:Chemcatchem
[Wiley]
日期:2017-12-04
卷期号:9 (24): 4538-4551
被引量:44
标识
DOI:10.1002/cctc.201701172
摘要
Abstract We develop and validate detailed reaction mechanisms to represent the oxidative coupling of methane (OCM) over a La 2 O 3 /CeO 2 nanofabric catalyst. The reaction mechanism includes 39 reversible gas‐phase reactions and 52 irreversible surface reactions between 22 gas‐phase species and 11 surface species. We use a model‐based interpretation of spatially resolved concentration and temperature profiles measured by using a laboratory‐scale packed‐bed reactor. The reaction mechanisms are validated for inlet feed compositions in the range of 7≤CH 4 /O 2 ≤11. The results are supported by a reaction pathway analysis that provides insight into the relative contributions of the gas‐phase and surface reactions to form the desired C 2+ and the undesired CO x products. The results provide new quantitative insights into the complex nature of the OCM chemistry, which can assist practical process and reactor development.
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