Conference paper
Oxidation of a model PCB (4-chlorobiphenyl) in catalytic and non-catalytic flow reactors and formation of PCDF
Proceedings of the Australian Combustion Symposium (Perth, Western Australia, 06/11/2013–08/11/2013)
2013
Abstract
Oxidation of a model polychlorinated biphenyl (4-chlorobiphenyl) has been studied in three flow reactors: an alumina reactor (1) exhibiting significant catalytic effects including promotion of O2 (1∆) and chlorination-dechlorination reactions at temperatures as low as 350° C; a high purity quartz reactor (2) which produced significantly lower O2 (1∆) and negligible chlorination-dechlorination and a high purity quartz reactor with surfaces passified by a boron oxide coating (3) in which only normal oxidation was observed at elevated temperatures (>600°C). The low temperature phenomena have been studied by quantum chemical techniques and reaction mechanisms to explain products’ formation (including the MCD 3-chlorodibenzofuran) are given. 3-Chlorodibenzofuran (the simplest PCDF) and benzaldehyde are important low temperature products produced by O2 (1∆) in reactors (1) and (2). Both O2 (1∆) and ground state O2 (3 Σ g) can displace Cl atoms from 4-chlorobiphenyl to produce polychlorobenzenes although only O2 (1Δ) produces significant yields of chlorobenzenes at low temperatures. Styrene and naphthalene also arise from O2 displacement of Cl.
Details
- Title
- Oxidation of a model PCB (4-chlorobiphenyl) in catalytic and non-catalytic flow reactors and formation of PCDF
- Authors/Creators
- M. Altarawneh (Author/Creator)J.C. Mackie (Author/Creator)S. Hou (Author/Creator)E.M. Kennedy (Author/Creator)B.Z. Dlugogorski (Author/Creator)
- Conference
- Proceedings of the Australian Combustion Symposium (Perth, Western Australia, 06/11/2013–08/11/2013)
- Identifiers
- 991005545279507891
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Conference paper
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