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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received May 5, 2016
Accepted October 24, 2016

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Effect of acid sites on catalytic destruction of trichloroethylene over solid acid catalysts

Tiantian Wang Qiguang Dai^1† Fuwu Yan^†

Hubei Key Laboratory of Advanced Technology for Automotive Components & Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, P. R. China ¹Key Lab for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China

daiqg@ecust.edu.cn

Korean Journal of Chemical Engineering, March 2017, 34(3), 664-671(8), 10.1007/s11814-016-0299-8

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Abstract

The catalytic destruction of trichloroethylene (TCE) over several solid acid catalysts (HZSM-5, γ-Al2O3 and SBA-15/P) was evaluated under dry conditions. The activity order was found to be: HZSM-5>SBA-15/P>γ-Al2O3. It was reported that Brønsted and Lewis acid sites of catalysts both played an important role on TCE catalytic destruction, while the Brønsted acid sites were more decisive. Additionally, the formation of the polychlorinated by-product (tetrachloroethylene, PCE) over HZSM-5 and γ-Al2O3 catalysts was observed and attributed to the presence of Lewis acid sites and basic O2-, and PCE was not detected over SBA-15/P catalyst due to the presence of only Brønsted acid sites. The TCE/O2-TPSR studies demonstrated that the main oxidation products during TCE catalytic destruction are CO, CO2 and Cl2, and the carbon in TCE was firstly converted to CO and then further oxidized into CO2 by gas phase O2.

Keywords

Trichloroethylene CVOCs Catalytic Oxidation Polychlorinated Byproducts Molecular Sieve

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