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Gas-phase photocatalytic oxidation of dichlorobutenes

Hamill, N.A. and Hardacre, C. and Barth, J.A.C. and Kalin, R.M. and Cunningham, J.F. (2001) Gas-phase photocatalytic oxidation of dichlorobutenes. Environmental Science and Technology, 35 (13). pp. 2823-2827. ISSN 1520-5851

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Abstract

Gas-phase photocatalysis of 1,4-dichlorobut-2-enes and 3,4-dichlorobut-1-ene (DCB) has been studied using TiO2 and 3%WO3/TiO2 supported on SiO2. DCB was found to oxidize efficiently over these catalysts; however, only low rates of CO2 formation were observed. With these chlorinated hydrocarbons, the catalysts were found to deactivate over time, probably via the formation of aldol condensation products of chloroacetaldehyde, which is the predominant intermediate observed. The variation in rate and selectivity of the oxidation reactions with O-2 concentration is reported and a mechanism is proposed. Using isotope ratio mass spectrometry, the initial step for the DCB removal has been shown not to be a carbon bond cleavage but is likely to be hydroxyl radical addition to the carbon-carbon double bond.

Item type: Article
ID code: 31938
Keywords: Gas-phase photocatalysis , oxidation , isotope ratio mass spectrometry, Engineering (General). Civil engineering (General), Environmental Chemistry, Chemistry(all)
Subjects: Technology > Engineering (General). Civil engineering (General)
Department: Faculty of Engineering > Civil and Environmental Engineering
Related URLs:
Depositing user: Pure Administrator
Date Deposited: 29 Jun 2011 09:33
Last modified: 05 Sep 2014 09:47
URI: http://strathprints.strath.ac.uk/id/eprint/31938

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