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標題: Experimental study on the performance of hydrogen production from miniature methanol–steam reformer integrated with Swiss-roll type combustor for PEMFC
關鍵字: Plate-type hydrogen production reactor;Methanol–air combustion;Methanol–steam reforming;Carbon monoxide methanation;Methanol conversion
Project: Applied Energy, Volume 105, Page(s) 86-98.
A miniature plate-type hydrogen production reactor using methanol as fuel was designed and tested. Thisreactor is composed of a catalytic combustor, vaporizer, reformer, and methanator. All components werefabricated on one piece of rectangular quartz glass plate 50 mm 44 mm 7 mm in size. The combustorwas fabricated on one side of the glass plate with a Swiss-roll type channel in which the Pt/Al2O3 particleswere loaded in segmented form to catalyze the combustion. A spiral channel was fabricated on the otherside of the plate and divided into three sections: a vaporizer for liquid methanol–water mixture vaporization,a reformer for methanol–steam reforming catalyzed by CuO/ZnO/Al2O3 particles and a methanatorfor carbon monoxide (CO) removal catalyzed by Ru/Al2O3 particles.The test results indicated that this reactor successfully produced H2 and had thermal efficiency rangingfrom 13% to 35%. The reactor performance depends on the feed rates to the combustor and reformer,respectively. High methanol conversion can be obtained from either a low feed rate to the reformer ora high feed rate to the combustor. However, both cases also produce high CO concentrations. The COmethanation reaction was used to reduce the CO concentration. It was found that the methanation reactiondepends greatly on the reactor temperature with high temperature not being favorable to this reaction.High CO conversion and low H2 consumption with low methanol conversion result when thereaction temperature is low. Thermal management for producing suitable temperature and catalyst activityimprovement in high reaction temperature for the methanator are both needed in the integrated reactordesign to reduce the CO concentration down to acceptable levels for fuel cell operation.
DOI: 10.1016/j.apenergy.2012.12.040
Appears in Collections:機械工程學系所

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