Batch reactor kinetic studies on the reductive dechlorination of chlorinated ethylenes by tetrakis-(4-sulfonatophenyl)porphyrin cobalt

Brandon R. Barnett; Alexandra L. Evans; Courtney C. Roberts; Joseph M. Fritsch

doi:10.1016/j.chemosphere.2010.11.015

Batch reactor kinetic studies on the reductive dechlorination of chlorinated ethylenes by tetrakis-(4-sulfonatophenyl)porphyrin cobalt

Brandon R. Barnett, Alexandra L. Evans, Courtney C. Roberts, Joseph M. Fritsch

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Tetrakis-(4-sulfonatophenyl)porphyrin cobalt was identified as a highly-active reductive dechlorination catalyst for chlorinated ethylenes. Through batch reactor kinetic studies, degradation of chlorinated ethylenes proceeded in a step-wise fashion with the sequential replacement of Cl by H. For perchloroethylene (PCE) and trichloroethylene (TCE), the dechlorination products were quantified and the C₂ mass was accounted for. Degradation of the chlorinated ethylenes was found to be first-order in substrate. Dechlorination trials with increasing catalyst concentration showed a linearly increasing pseudo first-order rate constant which yielded rate laws for PCE and TCE degradation that are first-order in catalyst. The dechlorination activity of this catalyst was compared to that of another water-soluble cobalt porphyrin under the same reaction conditions and found to be comparable for PCE and TCE.

Original language	English (US)
Pages (from-to)	592-596
Number of pages	5
Journal	Chemosphere
Volume	82
Issue number	4
DOIs	https://doi.org/10.1016/j.chemosphere.2010.11.015
State	Published - Jan 2011
Externally published	Yes

Bibliographical note

Funding Information:
This work was funded by the generous support of Tooma Undergraduate Research Fellowships and Undergraduate Research Programs at Pepperdine University. The authors would like to thank David Green for his technical support with respect to instrumentation and many helpful conversations. We would also like to thank Daphne Green, Paul Pestano, and Allison Zorn for their laboratory management support.

Keywords

Chlorinated ethylenes
Cobalt porphyrin
Kinetic studies
Reductive dechlorination

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.chemosphere.2010.11.015

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title = "Batch reactor kinetic studies on the reductive dechlorination of chlorinated ethylenes by tetrakis-(4-sulfonatophenyl)porphyrin cobalt",

abstract = "Tetrakis-(4-sulfonatophenyl)porphyrin cobalt was identified as a highly-active reductive dechlorination catalyst for chlorinated ethylenes. Through batch reactor kinetic studies, degradation of chlorinated ethylenes proceeded in a step-wise fashion with the sequential replacement of Cl by H. For perchloroethylene (PCE) and trichloroethylene (TCE), the dechlorination products were quantified and the C2 mass was accounted for. Degradation of the chlorinated ethylenes was found to be first-order in substrate. Dechlorination trials with increasing catalyst concentration showed a linearly increasing pseudo first-order rate constant which yielded rate laws for PCE and TCE degradation that are first-order in catalyst. The dechlorination activity of this catalyst was compared to that of another water-soluble cobalt porphyrin under the same reaction conditions and found to be comparable for PCE and TCE.",

keywords = "Chlorinated ethylenes, Cobalt porphyrin, Kinetic studies, Reductive dechlorination",

author = "Barnett, {Brandon R.} and Evans, {Alexandra L.} and Roberts, {Courtney C.} and Fritsch, {Joseph M.}",

note = "Funding Information: This work was funded by the generous support of Tooma Undergraduate Research Fellowships and Undergraduate Research Programs at Pepperdine University. The authors would like to thank David Green for his technical support with respect to instrumentation and many helpful conversations. We would also like to thank Daphne Green, Paul Pestano, and Allison Zorn for their laboratory management support. ",

year = "2011",

month = jan,

doi = "10.1016/j.chemosphere.2010.11.015",

language = "English (US)",

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pages = "592--596",

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AU - Barnett, Brandon R.

AU - Evans, Alexandra L.

AU - Roberts, Courtney C.

AU - Fritsch, Joseph M.

N1 - Funding Information: This work was funded by the generous support of Tooma Undergraduate Research Fellowships and Undergraduate Research Programs at Pepperdine University. The authors would like to thank David Green for his technical support with respect to instrumentation and many helpful conversations. We would also like to thank Daphne Green, Paul Pestano, and Allison Zorn for their laboratory management support.

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N2 - Tetrakis-(4-sulfonatophenyl)porphyrin cobalt was identified as a highly-active reductive dechlorination catalyst for chlorinated ethylenes. Through batch reactor kinetic studies, degradation of chlorinated ethylenes proceeded in a step-wise fashion with the sequential replacement of Cl by H. For perchloroethylene (PCE) and trichloroethylene (TCE), the dechlorination products were quantified and the C2 mass was accounted for. Degradation of the chlorinated ethylenes was found to be first-order in substrate. Dechlorination trials with increasing catalyst concentration showed a linearly increasing pseudo first-order rate constant which yielded rate laws for PCE and TCE degradation that are first-order in catalyst. The dechlorination activity of this catalyst was compared to that of another water-soluble cobalt porphyrin under the same reaction conditions and found to be comparable for PCE and TCE.

AB - Tetrakis-(4-sulfonatophenyl)porphyrin cobalt was identified as a highly-active reductive dechlorination catalyst for chlorinated ethylenes. Through batch reactor kinetic studies, degradation of chlorinated ethylenes proceeded in a step-wise fashion with the sequential replacement of Cl by H. For perchloroethylene (PCE) and trichloroethylene (TCE), the dechlorination products were quantified and the C2 mass was accounted for. Degradation of the chlorinated ethylenes was found to be first-order in substrate. Dechlorination trials with increasing catalyst concentration showed a linearly increasing pseudo first-order rate constant which yielded rate laws for PCE and TCE degradation that are first-order in catalyst. The dechlorination activity of this catalyst was compared to that of another water-soluble cobalt porphyrin under the same reaction conditions and found to be comparable for PCE and TCE.

KW - Chlorinated ethylenes

KW - Cobalt porphyrin

KW - Kinetic studies

KW - Reductive dechlorination

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Batch reactor kinetic studies on the reductive dechlorination of chlorinated ethylenes by tetrakis-(4-sulfonatophenyl)porphyrin cobalt

Abstract

Bibliographical note

Keywords

UN SDGs

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