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Catalytic behavior toward oxidative steam reforming of dimethyl ether over CuFe2O4-Al2O3 composite catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42059 45909 2010 7 PDF Available
Title
Catalytic behavior toward oxidative steam reforming of dimethyl ether over CuFe2O4-Al2O3 composite catalysts
Abstract

Oxidative steam reforming of dimethyl ether (DME OSR) for hydrogen production was studied over CuFe2O4-Al2O3 composite catalysts. The catalytic behaviors of the catalysts were investigated in terms of DME conversion, H2 production rate, and selectivity to CO2, CO, and CH4 as well as the catalyst temperature and gaseous concentration profiles along the catalyst bed. The catalysts exhibited good reforming activity and low CO formation (<2.5 vol.%) with trace amounts of other byproducts in the temperature range of 275–375 °C, steam/DME of 2.5, and O2/DME of 0–1. The increase in O2/DME resulted in improved DME conversion, but lower selectivity to H2. The catalyst was essentially stable in DME OSR in the 200 h stability test in the temperature range of 317–335 °C, while H2 concentration was stably obtained at ca. 62 vol.%. Oxygen was rapidly consumed in the beginning zone of the catalyst bed where the exothermic partial oxidation of DME along with CO oxidation would preferentially occur. The majority of reactions in the remaining zone was endothermic steam reforming of DME together with water gas shift reaction.

Graphical abstractOxidative steam reforming of dimethyl ether was studied over CuFe2O4-Al2O3 composite catalysts which showed excellent activity with high H2 yield as compared with Cu/ZnO/Al2O3 and Pd-Zn/Al2O3 catalysts. No degradation was observed in the reaction temperature range of 317–335 °C for 200 h.Figure optionsDownload full-size imageDownload high-quality image (76 K)Download as PowerPoint slide

Keywords
Oxidative steam reforming; Dimethyl ether; Hydrogen; Copper iron spinel; Alumina; Nanocomposite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 382, Issue 1, 30 June 2010, Pages 21–27
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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
Online Support
Any Questions? feel free to contact us