The coupling effect of gas-phase chemistry and surface reactions on oxygen permeation and fuel conversion in ITM reactors
Name
J.Hong et al. Journal of Membrane Science 488 2015 1-12.pdf
Size
1.41 MB
Format
Adobe PDF
Checksum (MD5)
d1e32d6f5dc96437b5c4aaf6565320ee
Author(s)
Hong, Jongsup
Kirchen, Patrick
Ghoniem, Ahmed F.
Ghoniem, Ahmed F
Date Issued
April 2015
Journal
Journal of Membrane Science
Publisher
Elsevier
Citation
Hong, Jongsup et al. “The Coupling Effect of Gas-Phase Chemistry and Surface Reactions on Oxygen Permeation and Fuel Conversion in ITM Reactors.” Journal of Membrane Science 488 (August 2015): 1–12 © 2015 Elsevier B.V.
Version
Author's final manuscript
Abstract
The effect of the coupling between heterogeneous catalytic reactions supported by an ion transport membrane (ITM) and gas-phase chemistry on fuel conversion and oxygen permeation in ITM reactors is examined. In ITM reactors, thermochemical reactions take place in the gas-phase and on the membrane surface, both of which interact with oxygen permeation. However, this coupling between gas-phase and surface chemistry has not been examined in detail. In this study, a parametric analysis using numerical simulations is conducted to investigate this coupling and its impact on fuel conversion and oxygen permeation rates. A thermochemical model that incorporates heterogeneous chemistry on the membrane surface and detailed chemical kinetics in the gas-phase is used. Results show that fuel conversion and oxygen permeation are strongly influenced by the simultaneous action of both chemistries. It is shown that the coupling somewhat suppresses the gas-phase kinetics and reduces fuel conversion, both attributed to extensive thermal energy transfer towards the membrane which conducts it to the air side and radiates to the reactor walls. The reaction pathway and products, in the form of syngas and C₂ hydrocarbons, are also affected. In addition, the operating regimes of ITM reactors in which heterogeneous- or/and homogeneous-phase reactions predominantly contribute to fuel conversion and oxygen permeation are elucidated.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.memsci.2015.04.006
