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Influence of the synthesis route on the catalytic oxidation of 1,2-dichloroethane over CeO2/H-ZSM5 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40524 45857 2013 9 PDF Available
Title
Influence of the synthesis route on the catalytic oxidation of 1,2-dichloroethane over CeO2/H-ZSM5 catalysts
Abstract

The performance of supported CeO2/HZSM-5 catalysts with a nominal CeO2 loading of 10 wt.% was evaluated for the oxidation of one of the most common chlorinated pollutants found in waste streams, namely 1,2-dichloroethane. The influence of the preparation method, such as impregnation in different media (water and ethanol), precipitation and ion exchange, was examined. Structural, morphological and physico-chemical changes caused as a function of the synthesis procedure were analysed by atomic emission spectroscopy, X-ray diffraction, BET measurements, transmission electronic microscopy, X-ray photoelectron spectroscopy, NH3-temperature-programmed desorption, adsorption of CO at low temperature followed by infrared spectroscopy, temperature-programmed reduction with hydrogen, energy dispersive X-ray spectroscopy and dynamic thermogravimetry coupled to mass spectrometry. The enhancement of the catalytic behaviour of the resulting ceria loaded samples with respect to plain H-ZSM5 could be explained on the basis of the synergetic effects of oxygen mobility and acid sites. In particular, the procedure based on impregnation with ethanol led to a highly dispersed ceria catalyst with a larger amount of oxygen vacancies. As a result, this catalyst required a temperature lower than 200 °C for attaining 50% conversion.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (100 K)Download as PowerPoint slideHighlights► Ceria deposition promoted the activity of H-ZSM5 zeolite. ► Reaction temperatures for Cl-VOC oxidation were lowered by 60 °C. ► Impregnation of ceria with ethanol resulted an efficient synthesis route. ► Activity was governed by a relatively reduced crystallite size. ► A more effective oxygen mobility was achieved.

Keywords
Cl-VOCs; Catalytic oxidation; 1,2-dichloroethane; Supported cerium oxide; H-ZSM-5 zeolite; Synthesis procedure
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Influence of the synthesis route on the catalytic oxidation of 1,2-dichloroethane over CeO2/H-ZSM5 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 456, 10 April 2013, Pages 96–104
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
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