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Assessment and optimization of the mass-transfer limitation in a metal foam methanol microreformer

Paper ID Volume ID Publish Year Pages File Format Full-Text
43515 45974 2008 8 PDF Available
Title
Assessment and optimization of the mass-transfer limitation in a metal foam methanol microreformer
Abstract

The performances of a methanol steam microreformer, constructed of CuZn metal foam coated by CuZnAlZr catalyst, were compared with those of a conventional packed-bed reactor. By variation of temperature, catalyst thickness and superficial velocity, the external and internal mass transfer in the microreformer was investigated. The external mass transfer can be ignored due to the high mass transfer coefficient of the metal foam. The internal diffusion resistance of the catalyst depends on the calcination temperature and catalyst/Al2O3 binder ratio of catalyst layer over metal foam, due to the development of catalyst pores. With optimum preparation conditions, the critical thickness to eliminate internal mass transfer limitation is about 8 μm. The improved external and internal mass transfer resulted in a methanol conversion increase of about 10% in microreformer compared with packed-bed.

Graphical abstractThe external and internal mass transfer of a methanol steam microreformer, constructed of CuZn metal foam coated by CuZnAlZr catalyst, was assessed by variation of temperature, catalyst thickness and superficial velocity. The improved external and internal mass transfer resulted in a methanol conversion increase of about 10% in microreformer compared with packed-bed. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Mass transfer; Microreactor; Metal foam; Methanol; Steam reforming
First Page Preview
Assessment and optimization of the mass-transfer limitation in a metal foam methanol microreformer
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 337, Issue 2, 25 March 2008, Pages 155–162
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis