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Gas-phase degradation of CCl4, CHCl3 and CH2Cl2 over metallic Fe

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Abstract

We studied the hydrolysis of gas-phase carbon tetrachloride (CCl4), chloroform (CHCl3), and dichloromethane (CH2Cl2) over a metallic Fe surface for its application in combination with air stripping and soil vapour extraction. The effects of chlorocarbon concentration, type and preparation of the iron-containing material, humidity, and temperature on process performance are reported. The hydrolysis of chlorinated methane derivatives is catalysed by metallic iron resulting in a noticeable decrease of the reaction temperature. The reaction kinetics were found to be consistent with the Langmuir-Hinshelwood model.

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Acknowledgements

Financial support from the Academy of Finland, Maj and Tor Nessling Foundation (Finland), and the Estonian Science Foundation is gratefully acknowledged. The authors wish to thank Dr. K. A. Magrini-Bair and Dr. E. J. Wolfrum for their valuable advice at the beginning stages of this work.

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Authors and Affiliations

  1. Department of Chemical Technology, Lappeenranta University of Technology, P. O. Box 20, 53851, Lappeenranta, Finland

    Sergei Preis & Juha Kallas

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  1. Sergei Preis
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  2. Juha Kallas
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Correspondence to Sergei Preis.

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Preis, S., Kallas, J. Gas-phase degradation of CCl4, CHCl3 and CH2Cl2 over metallic Fe. Environ Chem Lett 2, 9–13 (2004). https://doi.org/10.1007/s10311-004-0067-6

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  • DOI: https://doi.org/10.1007/s10311-004-0067-6

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