Methane Combustion with Cobalt-Substituted Barium-Lanthanum Hexaaluminate Catalysts Supported on Porous Monolithic Honeycombs
Publication: Journal of Energy Engineering
Volume 144, Issue 3
Abstract
Methane combustion with porous honeycomb hexaaluminate catalysts is studied under high temperatures. Cobalt-substituted barium-lanthanum hexaaluminates () are prepared by co-precipitation procedures and directly deposited onto 300-cpsi porous monolithic honeycomb supports. Catalyst characterizations are performed by scanning electron microscope, X-ray diffraction, and Brunauer-Emmett-Teller method. Effects of La substitution ratio, catalyst content and length, and air preheating temperature on catalytic combustion performances are evaluated. Increasing La substitution ratio can significantly enhance catalyst activity, thermal stability, specific surface area, and combustion performance. The monolithic honeycomb catalyst with largest specific surface area and optimal combustion performance has an optimal catalyst content of 6.0% by weight. The long honeycomb catalyst can improve flame stability limits and reduce pollutant emissions. Increasing air preheating temperature can reduce HC and CO emissions, whereas NOx formation can be improved as the air preheating temperature higher than 250°C.
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Acknowledgments
This study is supported by the National Natural Science Foundation of China (No. 51676153), National Program for Support of Top-Notch Young Professionals, and Discipline Innovative Engineering Plan (B16038).
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Published In
Journal of Energy Engineering
Volume 144 • Issue 3 • June 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Feb 24, 2017
Accepted: Oct 27, 2017
Published online: Mar 8, 2018
Published in print: Jun 1, 2018
Discussion open until: Aug 8, 2018
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