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J Hazard Mater. 2016 Mar 15;305:178-189. doi: 10.1016/j.jhazmat.2015.11.025. Epub 2015 Dec 1.

Degradation of trichloroethylene by hydrodechlorination using formic acid as hydrogen source over supported Pd catalysts.

Author information

1
State Key Laboratory of Chemical Engineering, East China University of Science and Technology (ECUST), Shanghai 200237, China; College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, PR China.
2
State Key Laboratory of Chemical Engineering, East China University of Science and Technology (ECUST), Shanghai 200237, China.
3
The Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Canada.
4
The Wolfson Department of Chemical Engineering, Technion-Israel Institute of Technology Technion City, Haifa 32000, Israel.
5
State Key Laboratory of Chemical Engineering, East China University of Science and Technology (ECUST), Shanghai 200237, China. Electronic address: yifanhan@ecust.edu.cn.

Abstract

An advanced method for the degradation of trichloroethylene (TCE) over Pd/MCM-41 catalysts through a hydrogen-transfer was investigated. Formic acid (FA) was used instead of gaseous H2 as the hydrogen resource. As a model H-carrier compound, FA has proven to yield less by-products and second-hand pollution during the reaction. Several factors have been studied, including: the property of catalyst supports, Pd loading and size, temperature, initial concentrations of FA and TCE (potential impact on the reaction rates of TCE degradation), and FA decomposition. The intrinsic kinetics for TCE degradation were measured, while the apparent activation energies and the reaction orders with respect to TCE and FA were calculated through power law models. On the basis of kinetics, we assumed a plausible reaction pathway for TCE degradation in which the catalytic degradation of TCE is most likely the rate-determining step for this reaction.

KEYWORDS:

Formic acid (FA); Hydrodechlorination; Kinetics; Pd/MCM-41; Trichloroethylene (TCE)

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