fulltext.study @t Gmail

On the mechanisms and the selectivity determining steps in syngas conversion over supported metal catalysts: An IR study

Paper ID Volume ID Publish Year Pages File Format Full-Text
43739 45986 2007 7 PDF Available
Title
On the mechanisms and the selectivity determining steps in syngas conversion over supported metal catalysts: An IR study
Abstract

An IR study of syngas and methanol conversion has been performed over Cu–ZnO–Al2O3 methanol synthesis catalyst, Ni–Al2O3 methanation catalyst and Co–Al2O3 Fischer Tropsch catalyst. The data, obtained at low pressure, provide unequivocal evidence of the existence of a way via oxygenated intermediates (formates, possibly dioxymethylene, methoxy groups) in the three cases. In the selectivity determining step, methoxy groups desorb associatively as methanol on Cu–ZnO–Al2O3. Methoxy groups are selectively hydrogenolyzed to methane over Ni–Al2O3. Over Co–Al2O3 oxygenated surface species may be involved in the chain growth to give C2+ compounds. It is possible that this mechanism coexists with the via-carbide all-metallic catalysis reported for methanation and FT synthesis, on the basis of studies performed on pure metals.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Methanol synthesis; Methanation; Fischer Tropsch synthesis; IR spectroscopy; Oxygenated intermediates; Syngas conversions; Selectivity; Cu–ZnO–Al2O3 catalyst; Ni–Al2O3 catalyst; Co–Al2O3 catalyst
First Page Preview
On the mechanisms and the selectivity determining steps in syngas conversion over supported metal catalysts: An IR study
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 316, Issue 1, 2 January 2007, Pages 68–74
Authors
, , , ,
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