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Preferential CO oxidation over a copper–cerium oxide catalyst in a microchannel reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
43383 45967 2008 10 PDF Available
Title
Preferential CO oxidation over a copper–cerium oxide catalyst in a microchannel reactor
Abstract

The activity of a 5-wt% Cu/CeO2−x catalyst during preferential CO oxidation in hydrogen-rich gas mixtures was studied in a microchannel reactor. The CO concentration dropped from 1 vol.% to 10 ppm at a selectivity of 60%, at a temperature of 190 °C, and a weight hour space velocity (WHSV) of 55,000 cm3 g−1 h−1. Both the CO concentration and the temperature increased when the WHSV was increased from 50,000 to 500,000 cm3 g−1 h−1. An increase of the O2 concentration from a 1.2 to 3 fold excess reduced the CO concentration to 10 ppm in a broad temperature interval of 50 °C at WHSVs up to 275,000 cm3 g−1 h−1. The preferential CO oxidation could be carried out at higher flow rates and at higher selectivities in the microchannel reactor compared to a fixed-bed flow reactor.

Graphical abstractThe activity of a 5 wt% Cu/CeO2−x catalyst during preferential CO oxidation in hydrogen-rich gas mixtures was studied in a microchannel reactor. An increase of the O2 concentration from a 1.2 to 3 fold excess reduced the CO concentration to 10 ppm in a broad temperature interval of 50 °C at weight hour space velocity (WHSV) up to 275,000 cm3 g−1 h−1. The preferential CO oxidation could be carried out at higher flow rates and at higher selectivities in the microchannel reactor compared to a fixed-bed flow reactor.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
CO removal; Preferential CO oxidation; Selective oxidation of carbon monoxide; Hydrogen purification; Copper–ceria oxide catalyst; Microchannel reactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 350, Issue 1, 15 November 2008, Pages 53–62
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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