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Catalytic combustion of chlorobenzene on the Ln modified Co/HMS

Paper ID Volume ID Publish Year Pages File Format Full-Text
46283 46436 2012 9 PDF Available
Title
Catalytic combustion of chlorobenzene on the Ln modified Co/HMS
Abstract

Lanthanide (Ln, including La, Ce and Nd) modified Co/HMS was prepared via two pathways: extra-framework modified post-loading and framework modified direct synthesis. The influence of modified methods, rare earths kind and rare earths loading on the catalytic performance of Co/HMS was studied by the catalytic combustion of chlorobenzene (CB). It was found that the extra-framework Ce modified catalysts show the better catalytic performance than the framework Ln modified ones due to that the forming of CeO2 is advantaged to obtain the fine Co3O4 crystal clusters and the reduction of Ce4+ ions to Ce3+ species probably will promote neighboring reduction of Co species. The suitable extra-framework Ce loading (6%, mass fraction) can effectively ameliorate the redox ability of Co species in the channel of HMS. Since the channel of HMS itself and Co(NO3)3·6H2O aqueous solution both are hydrophilic, the polarity adjusting function of framework Ln to the internal reaction between Co species and support is not great in this case. However, the slightly improved redox ability and weak acidity originated from framework Ln still can do some contribution to the catalytic performance. The electronic structure of Co and Ce is advantageous to the delocalization of π-electrons and the forming of radical species.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ln modified Co/HMS was studied by catalytic combustion of chlorobenzene. ► Extra-framework CeO2 can improved the redox ability of Co/HMS effectively. ► A tentative radical mechanism was proposed.

Keywords
Chlorobenzene; Catalytic combustion; HMS; Rare earths
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 127, 30 October 2012, Pages 246–254
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