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Title

Reductive dechlorination of chlorobenzene in supercritical water catalyzed by Fe/ZrO<sub>2</sub>.

Authors

Guang-Tao Wei; Chao-Hai Wei; Chao-Fei Wu; Feng-Mei He

Abstract

Reductive dechlorination of chlorobenzene by Fe/ZrO2 in supercritical water was investigated. The effects of the operation conditions were studied. The dechlorination of chlorobenzene obeyed pseudo-first-order kinetics models. In supercritical water, the rate constant increases more rapidly with temperature than those in subcritical water. The results showed that the rate-determining step of dechlorination in subcritical water is diffusion; whereas the rate-determining of dechlorination in supercritical water is chemical reaction. The reaction mechanism in subcritical water might involve with an ionic mechanism; whereas the reaction mechanism in supercritical water might involve with a homolytic reaction.

Subjects

CHLOROBENZENE; IRON; CHEMICAL reactions; WATER; ORGANOCHLORINE compounds

Publication

Environmental Chemistry Letters, 2010, Vol 8, Issue 2, p165

ISSN

1610-3653

Publication type

Academic Journal

DOI

10.1007/s10311-009-0204-3

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