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Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
48420 46506 2008 10 PDF Available
Title
Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions
Abstract

The validity of a new method to destroy gas-phase perchloroethylene (PCE) is demonstrated at bench scale using a fixed-bed reactor that contains a Pt/Rh catalyst. Hydrogen and oxygen were simultaneously fed to the reactor together with PCE. The conversion efficiencies of PCE were sensitive to H2/O2 ratio and reactor temperature. When the temperature was ≥400 °C and H2/O2 was ≥2.15, PCE conversion efficiency was maintained at ≥90%. No catalyst deactivation was observed for over 2 years, using only mild, convenient regeneration procedures. It is likely that PCE reduction steps precede oxidation reactions and that the importance of oxidation lies in its elimination of intermediates that would otherwise lead to catalyst poisoning. In practice, this catalytic dechlorination method holds potential for low-cost, large-scale field operation.

Keywords
PCE destruction; Catalytic dechlorination; Redox conditions; Reduction; Oxidation
First Page Preview
Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 79, Issue 1, 21 February 2008, Pages 43–52
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis