Detailed Reaction Mechanisms for the Oxidative Coupling of Methane over La2O3/CeO2 Nanofiber Fabric Catalysts
Abstract
We develop and validate detailed reaction mechanisms to represent the oxidative coupling of methane (OCM) over a La2O3/CeO2 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≤CH4/O2≤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 C2+ and the undesired COx products. The results provide new quantitative insights into the complex nature of the OCM chemistry, which can assist practical process and reactor development.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 04, 2017
- Source ID
- 10.1002/cctc.201701172
Entities
People
- Bahman Zohour
- Canan Karakaya
- Huayang Zhu
- Robert J. Kee
- Selim Senkan
Organizations
- Air Force Office of Scientific Research
- Colorado School of Mines
- National Science Foundation