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Ortho-dichlorobenzene oxidation over Pd/Co loaded sulfated zirconia and mordenite catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43682 45982 2008 9 PDF Available
Title
Ortho-dichlorobenzene oxidation over Pd/Co loaded sulfated zirconia and mordenite catalysts
Abstract

The oxidation of 1,2-dichlorobenzene (o-DCB) has been examined over Co–HMOR, Pd/Co–HMOR, Co–SZ and Pd/Co–SZ under dry and wet conditions. Under dry conditions, Pd/Co–SZ was the most active catalyst. However, in the presence of water Pd/Co–HMOR exhibits a significant activity while Pd/Co–SZ was not affected. Besides, by-product formation such as polychlorinated compounds decreased on both catalyst types under wet conditions. Catalysts were characterized by XRD, BET, TGA, TPR, and NH3-temperature programmed desorption (TPD). The sulfation process greatly increased the surface areas of zirconia catalysts. No significant changes in the H2-TPR profiles of Co–SZ and Pd/Co–SZ under dry and wet conditions were observed while Co2+ ions at exchange positions of mordenite decreased on used mordenite catalysts. In spite of a higher total acidity (NH3-TPD) of mordenite catalysts compared to sulfated zirconia catalysts, zirconia-sulfated catalysts exhibited higher activity when dry feeds were used.

Graphical abstractThe performance of Pd/Co–HMOR for the oxidation of 1,2-dichlorobenzene (o-DCB) was significantly enhanced under wet conditions while the activity of Pd/Co–SZ was almost the same either under dry or wet conditions.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Oxidation; Ortho-dichlorobenzene; Sulfated zirconia; Mordenite; Cobalt; Palladium cobalt-sulfated zirconia; Palladium cobalt mordenite
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Ortho-dichlorobenzene oxidation over Pd/Co loaded sulfated zirconia and mordenite catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 335, Issue 2, 8 February 2008, Pages 211–219
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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