Interactions between oxygen permeation and homogeneous-phase fuel conversion on the sweep side of an ion transport membrane
Name
Ghoniem_Interactions between.pdf
Size
6.94 MB
Format
Adobe PDF
Checksum (MD5)
d1f89d6bdecd89131ccce12b71c3f9a4
Author(s)
Hong, Jongsup
Kirchen, Patrick
Ghoniem, Ahmed F.
Date Issued
November 2012
Journal
Journal of Membrane Science
Publisher
Elsevier
Citation
Hong, Jongsup, Patrick Kirchen, and Ahmed F. Ghoniem. “Interactions Between Oxygen Permeation and Homogeneous-Phase Fuel Conversion on the Sweep Side of an Ion Transport Membrane.” Journal of Membrane Science 428 (February 2013): 309–322.
Version
Author's final manuscript
Abstract
The interactions between oxygen permeation and homogeneous fuel oxidation reactions on the sweep side of an ion transport membrane (ITM) are examined using a comprehensive model, which couples the dependency of the oxygen permeation rate on the membrane surface conditions and detailed chemistry and transport in the vicinity of the membrane. We assume that the membrane surface is not catalytic to hydrocarbon or syngas oxidation. Results show that increasing the sweep gas inlet temperature and fuel concentration enhances oxygen permeation substantially. This is accomplished through promoting oxidation reactions (oxygen consumption) and the transport of the products and reaction heat towards the membrane, which lowers the oxygen concentration and increases the gas temperature near the membrane. Faster reactions at higher fuel concentration and higher inlet gas temperature support substantial fuel conversion and lead to a higher oxygen permeation flux without the contribution of surface catalytic activity. Beyond a certain maximum in the fuel concentration, extensive heat loss to the membrane (and feed side) reduces the oxidation kinetic rates and limits oxygen permeation as the reaction front reaches the membrane. The sweep gas flow rate and channel height have moderate impacts on oxygen permeation and fuel conversion due to the residence time requirements for the chemical reactions and the location of the reaction zone relative to the membrane surface.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-NoDerivatives
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.memsci.2012.10.055
