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The quantitative description of the effects of cesium doping on the activity and properties of Cu/ZnO/Al2O3 catalyst in low-temperature water–gas shift

Paper ID Volume ID Publish Year Pages File Format Full-Text
40994 45874 2012 6 PDF Available
Title
The quantitative description of the effects of cesium doping on the activity and properties of Cu/ZnO/Al2O3 catalyst in low-temperature water–gas shift
Abstract

The effects of cesium doping (in the concentration range up to 5 wt.% Cs2O) introduced into a copper catalyst with the composition corresponding to that for the industrial catalysts used for low-temperature water–gas shift process (LT-WGS) have been investigated. Precursors and catalysts have been characterized by XRD, ICP-OS, TPD-EGA, N2O chemisorption, TPR, N2 physisorption and reaction rates for WGS and methanol synthesis under the pressure of 2.5 MPa have been determined. The results reveal that the cesium doping inhibits radically methanol synthesis, with the optimal Cs2O content being <1 wt.%.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (110 K)Download as PowerPoint slideHighlights► Inhibition of methanol synthesis in the LT-WGS process on Cu/ZnO/Al2O3 by cesium. ► Modification of the reduction process by alkali metals. ► Decrease of specific and active surface areas by alkali metals. ► Significant decrease of methanol formation with a slight effect on LT-WGS process. ► Decrease of catalytic activity upon thermal treatment favored by cesium.

Keywords
Water–gas shift; Cu/ZnO/Al2O3 catalyst; Cesium oxide; Methanol synthesis
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The quantitative description of the effects of cesium doping on the activity and properties of Cu/ZnO/Al2O3 catalyst in low-temperature water–gas shift
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 423–424, 7 May 2012, Pages 15–20
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