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Catalytic hydrogen-assisted dehydrochlorination of 1,2-dichloroethane over cobalt-containing beta zeolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
54094 46996 2015 8 PDF Available
Title
Catalytic hydrogen-assisted dehydrochlorination of 1,2-dichloroethane over cobalt-containing beta zeolite
Abstract

•C-Co2.0HAlBEA was active in dehydrochlorination of 1,2-dichloroethane.•C-Co2.0HAlBEA showed an excellent selectivity toward vinyl chloride (∼100%).•Dehydrochlorination of 1,2-dichloroethane is related to Brønsted and Lewis acidic sites.

HAlBEA zeolite obtained by calcination of parent TEABEA zeolite at 823 K for 3 h in air following ion exchange with NH4NO3 solution and calcination at 773 K for 3 h was used for synthesis of cobalt containing zeolite by conventional wet impregnation with an aqueous solution of Co(NO3)2. The calcination of as-prepared Co2.0HAlBEA at 773 K in air led to the formation of C-Co2.0HAlBEA with isolated mononuclear Co(II) and polynuclear Co(II) and Co(III) species as evidenced by XRD, FTIR, DR UV–Vis and XPS. C-HAlBEA and C-Co2.0HAlBEA treated up to 1200 K in flowing 10% H2/Ar were investigated as the catalysts in hydrogen-assisted dehydrochlorination of 1,2-dichloroethane. Both C-HAlBEA and C-Co2.0HAlBEA catalysts were given 100% of selectivity toward vinyl chloride monomer in the presence of hydrogen at rather low reaction temperature (i.e. 523 K). Specific balance between amounts of Brønsted and Lewis acidic related, respectively, to Si–O(H)–Al and unsaturated Al(III), Co(II) and/or Co(III) species had a beneficial impact on the activity and stability of C-Co2.0HAlBEA catalyst.

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Keywords
Cobalt; Beta zeolites; 1,2-Dichloroethane; Dehydrochlorination; Vinyl chloride.
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Catalytic hydrogen-assisted dehydrochlorination of 1,2-dichloroethane over cobalt-containing beta zeolite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 251, 1 August 2015, Pages 73–80
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