The co-pyrolysis of flame retarded high impact polystyrene and polyolefins |
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Affiliation: | 1. Energy and Resources Research Institute, University of Leeds, Leeds LS2 9JT, United Kingdom;2. Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima Naka, 700-8530 Okayama, Japan;3. Catalytic Conversion Process Division, Indian Institute of Petroleum, Dehradun, India;1. Middle East Technical University, Dept. Polymer Sci. & Technol., TR-06800 Ankara, Turkey;2. Middle East Technical University, Dept. Metallurgical and Materials Eng., TR-06531 Ankara, Turkey;3. Middle East Technical University, Dept. Chem., TR-06800 Ankara, Turkey;1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, PR China;2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China;3. Instrumental Analysis Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, PR China |
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Abstract: | The co-pyrolysis of brominated high impact polystyrene (Br-HIPS) with polyolefins using a fixed bed reactor has been investigated, in particular, the effect that different types of brominated aryl compounds and antimony trioxide have on the pyrolysis products. The pyrolysis products were analysed using FT-IR, GC–FID, GC–MS, and GC–ECD. Liquid chromatography was used to separate the oils/waxes so that a more detailed analysis of the aliphatic, aromatic, and polar fractions could be carried out. It was found that interaction occurs between Br-HIPS and polyolefins during co-pyrolysis and that the presence of antimony trioxide influences the pyrolysis mass balance. Analysis of the Br-HIPS + polyolefin co-pyrolysis products showed that the presence of polyolefins led to an increase in the concentration of alkyl and vinyl mono-substituted benzene rings in the pyrolysis oil/wax resulting from Br-HIPS pyrolysis. The presence of Br-HIPS also had an impact on the oil/wax products of polyolefin pyrolysis, particularly on the polyethylene oil/wax composition which converted from being a mixture of 1-alkenes and n-alkanes to mostly n-alkanes. Antimony trioxide had very little impact on the polyolefin wax/oil composition but it did suppress the formation of styrene and alpha-methyl styrene and increase the formation of ethylbenzene and cumene during the pyrolysis of the Br-HIPS. |
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