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Highly selective hydrodechlorination of 1,2-dichloroethane to ethylene over Ag-Pd/ZrO2 catalysts with trace Pd

Paper ID Volume ID Publish Year Pages File Format Full-Text
38892 45796 2016 6 PDF Available
Title
Highly selective hydrodechlorination of 1,2-dichloroethane to ethylene over Ag-Pd/ZrO2 catalysts with trace Pd
Abstract

•Ag-Pd/ZrO2 with trace Pd was prepared using the co-impregnation method.•Isolated Pd sites dominated in the Ag-Pd/ZrO2 catalysts.•Ag-Pd/ZrO2 with trace Pd exhibited high ethylene selectivities.

Gas-phase catalytic hydrodechlorination is one of the most efficient and economic methods for the removal of volatile chlorinated alkanes. Novel Ag-based bimetallic catalysts with high ethylene selectivities were prepared using the co-impregnation method. The catalysts were characterized by X-ray diffraction, UV–vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy and IR spectroscopy of CO adsorption. The catalytic performance, in particular the selectivities of the catalysts was examined on hydrodechlorination of 1,2-dichloroethane. Two supported monometallic catalysts (Ag/ZrO2 and Pd/ZrO2) were included as comparative catalysts. Ag/ZrO2 exhibited a low 1,2-dichloroethane coversion and high chloroethylene selectivity for the gas-phase hydrodechlorination of 1,2-dichloroethane, while Pd/ZrO2 had a high conversion and ethane selectivity. In contrast to monometallic catalysts, Ag-Pd/ZrO2 with trace Pd had substantially enhanced ethylene selectivity, and the bimetallic catalyst with a Pd loading amount of 0.099 wt.% (denoted as Ag(1.99)-Pd(0.099)/ZrO2) exhibited nearly 100% ethylene selectivity. The excellent ethylene selectivity can be attributed to the highly dispersed metallic Pd in Ag particles of Ag(1.99)-Pd(0.099)/ZrO2 as evidenced by the IR spectra of CO adsorption. The findings in this study indicate that Ag-Pd/ZrO2 with trace Pd can be used as promising catalyts for highly effective and selective hydrodechlorination of volatile chlorinated alkanes.

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Keywords
Ag-Pd/ZrO2 catalysts with trace Pd; Catalytic hydrodechlorination; 1,2-dichloroethane; Ethylene selectivity
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Highly selective hydrodechlorination of 1,2-dichloroethane to ethylene over Ag-Pd/ZrO2 catalysts with trace Pd
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 519, 5 June 2016, Pages 1–6
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