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Effect of Cr-doping on CuCl2-KCl-CeO2/γ-Al2O3 catalysts for ethane oxychlorination

Paper ID Volume ID Publish Year Pages File Format Full-Text
39047 45802 2015 9 PDF Available
Title
Effect of Cr-doping on CuCl2-KCl-CeO2/γ-Al2O3 catalysts for ethane oxychlorination
Abstract

•The addition of Cr species reduces the reduction activation energy of Cu(II) → Cu(I).•The addition of Cr species affects the crystal size of CeO2 on the surface.•Best catalyst shows highest C2H6 conversion (97.8%) and selectivity to C2H3Cl (68.2%).

Chromium-doped CuCl2–KCl–CeO2–Crx/γ-Al2O3 with different content (Cr 0, 1, 3, 5, 7 and 9 wt.%) were synthesized by co-impregnation method and characterized by XRD, BET, SEM, H2-TPR and XPS techniques. It is found that the addition of chromium species increases a large amount of capping oxygen species on the catalysts surface, reduces the reduction activation energy of Cu(II) → Cu(I) process efficiently, and accelerates the transition of redox group Cu(II)/Cu(I). Meanwhile, the addition of chromium species also affects the crystal size of CeO2 on the surface. The best catalyst is CuKCeCr3 with Cr (3 wt.%), which exhibited highest conversion of C2H6 (97.8%) and best selectivity to C2H3Cl (68.2%).

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Keywords
Chromium; Reduction activation energy; Ethane oxychlorination
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Effect of Cr-doping on CuCl2-KCl-CeO2/γ-Al2O3 catalysts for ethane oxychlorination
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 506, 5 October 2015, Pages 91–99
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Any Questions? feel free to contact us