In this article, we report a detailed study on co-production of H2 and syngas on La0.9Ca0.1FeO3−δ (LCF-91) membranes via water splitting and partial oxidation of methane, respectively. A permeation model shows that the surface reaction on the sweep side is the rate limiting step for this process on a 0.9 mm-thick dense membrane at 990°C. Hence, sweep side surface modifications such as adding a porous layer and nickel catalysts were applied; the hydrogen production rate from water thermolysis is enhanced by two orders of magnitude to 0.37 μmol/cm2•s compared with the results on the unmodified membrane. At the sweep side exit, syngas (H2/CO = 2) is produced and negligible solid carbon is found. Yet near the membrane surface on the sweep side, methane can decompose into solid carbon and hydrogen at the surface, or it may be oxidized into CO and CO2, depending on the oxygen permeation flux.
|Original language||English (US)|
|Number of pages||9|
|State||Published - Oct 10 2016|
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors would like to thank both Shell and the King Abdullah University of Science and Technology (KAUST) for funding the research. This contribution was identified by Dr. Dushyant Shekhawat (National Energy Technology Laboratory) as the Best Presentation in the session “Fuel Processing for Hydrogen Production” of the 2015 AIChE Annual Meeting in Salt Lake City.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.