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Degradation and regeneration of copper-iron spinel and zeolite composite catalysts in steam reforming of dimethyl ether

Paper ID Volume ID Publish Year Pages File Format Full-Text
42201 45914 2010 9 PDF Available
Title
Degradation and regeneration of copper-iron spinel and zeolite composite catalysts in steam reforming of dimethyl ether
Abstract

The degradation and regeneration behaviors of some composite catalysts of ZSM-5 zeolite and Cu-Fe spinel in steam reforming of dimethyl ether (DME) were systematically studied in various conditions. The degradation of the catalyst could be inhibited by increasing the steam-to-DME ratio and/or lowering the gas hourly space velocity and the reforming temperature. A higher mixing ratio of Cu-Fe spinel to ZSM-5 could also prolong the life of the composite catalysts. The catalyst deactivation was attributable mainly to the carbon deposition in the reaction temperature range of 250–310 °C. The regeneration treatment in air at 500–700 °C could not only recover the catalytic performance of the degraded catalysts as compared with the fresh catalyst, but could also improve it. We confirmed that the promoting effect of the heat treatment in air was due to the high redispersion of metallic Cu via the re-construction of Cu-Fe spinel as well to as the removal of carbon deposit by burning; the acid property changes over zeolite catalyst were suggested to contribute to the improvement as well.

Graphical abstractThe catalyst degradation was attributable mainly to the carbon deposition. The regeneration treatment in air at 500–700 °C could not only recover the catalytic performance of the degraded catalysts as compared with the fresh catalyst, but could also improve it.Figure optionsDownload full-size imageDownload high-quality image (125 K)Download as PowerPoint slide

Keywords
Copper-iron spinel; Steam reforming; Dimethyl ether; Zeolite; Degradation; Regeneration; Heat treatment
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Degradation and regeneration of copper-iron spinel and zeolite composite catalysts in steam reforming of dimethyl ether
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 378, Issue 2, 30 April 2010, Pages 234–242
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us