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Highly active copper catalyst for low-temperature water-gas shift reaction prepared via a Cu-Mn spinel oxide precursor

Paper ID Volume ID Publish Year Pages File Format Full-Text
40567 45858 2013 8 PDF Available
Title
Highly active copper catalyst for low-temperature water-gas shift reaction prepared via a Cu-Mn spinel oxide precursor
Abstract

The effect of preparation method on structural properties and activity of Cu-Mn spinel oxide catalysts for the low-temperature water-gas shift reaction (LT-WGSR) has been studied. Single-step urea-combustion and coprecipitation procedures were used for synthesis of the catalysts. Catalyst characterization was performed by N2 physisorption, XRD, HRTEM, CO-TPR, CO-TPD and FTIR spectroscopy. The WGS activity was evaluated in a conventional flow reactor in the temperature range of 140–240 °C. The influence of reaction gas mixture, including either idealized or realistic reformate, H2O/CO ratio and contact time on activity were investigated. The catalytic activity tests carried out with both idealized and realistic reformate demonstrated the superior performance of the catalyst prepared by the single-step urea-combustion method. Moreover, comparison of the WGS activity of these catalysts with the one of a commercial CuO-ZnO-Al2O3 catalyst points out the potential application of Cu-Mn spinel oxide catalysts in LT-WGSR. The results revealed that the urea-combustion synthesis method is more appropriate than coprecipitation for the preparation of active and stable Cu-Mn spinel oxide catalysts for LT-WGSR.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (244 K)Download as PowerPoint slideHighlights► Cu-Mn spinel oxides were synthesized via combustion and coprecipitation methods. ► Highly dispersed Cu0 sites are created from reduction/decomposition of combustion-derived spinel. ► XRD and HRTEM evidenced higher copper dispersion in combustion-prepared catalyst. ► The combustion-derived catalyst demonstrated superior performance in LT-WGSR.

Keywords
Cu-Mn spinel oxide; Preparation; Urea combustion; WGSR; HRTEM
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Highly active copper catalyst for low-temperature water-gas shift reaction prepared via a Cu-Mn spinel oxide precursor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 451, 31 January 2013, Pages 184–191
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