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Removal of organobromine compounds from the pyrolysis oils of flame retarded plastics using zeolite catalysts

Hall, W.J. and Williams, P.T. (2008) Removal of organobromine compounds from the pyrolysis oils of flame retarded plastics using zeolite catalysts. Journal of Analytical and Applied Pyrolysis, 81 (2). pp. 139-147. ISSN 0165-2370

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Abstract

Two flame retarded plastics have been pyrolysed in the presence of two Zeolite catalysts to remove the organobromine compounds from the derived pyrolysis oil. The flame retarded plastics were, acrylonitrile – butadiene – styrene (ABS) that was flame retarded with tetrabromobisphenol A and high-impact-polystyrene (HIPS) that was flame retarded with decabromodiphenyl ether. The two catalysts investigated were Zeolite ZSM-5 and Y-Zeolite. Pyrolysis was carried out in a fixed bed reactor at a final pyrolysis temperature of 440 ºC. The pyrolysis gases were passed immediately to a fixed bed of the catalyst bed. It was found that the presence of Zeolite catalysts increased the amount of gaseous hydrocarbons produced during pyrolysis but decreased the amount of pyrolysis oil produced. In addition, significant quantities of coke were formed on the surface of the catalysts during pyrolysis. The Zeolite catalysts were found to reduce the formation of some valuable pyrolysis products such as styrene and cumene, but other products such as naphthalene were formed instead. The Zeolite catalysts, especially Y-Zeolite, were found to be very effective at removing volatile organobromine compounds. However, they were less effective at removing antimony bromide from the volatile pyrolysis products, although some antimony bromide was found on the surfaces of the spent catalysts.

Item Type: Article
Copyright, Publisher and Additional Information: © 2008 Elsevier B.V. This is an author produced version of a paper published in Journal of analytical and applied pyrolysis. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: flame retarded plastics, brominated polystyrene, brominated ABS, Zeolite, catalyst
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Process, Environmental and Materials Engineering (Leeds) > Energy and Resources Research Institute (Leeds)
Depositing User: Dr William Hall
Date Deposited: 29 Feb 2008 15:04
Last Modified: 08 Feb 2013 17:05
Published Version: http://dx.doi.org/10.1016/j.jaap.2007.09.008
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/j.jaap.2007.09.008
URI: http://eprints.whiterose.ac.uk/id/eprint/3665

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