General Information
    • ISSN: 2010-0221 (Print)
    • Abbreviated Title: Int. J. Chem. Eng. Appl.
    • Frequency: Quarterly
    • DOI: 10.18178/IJCEA
    • Editor-in-Chief: Prof. Dr. Shen-Ming Chen
    • Executive Editor: Jennifer X. Zeng
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Editor-in-chief
Prof. Dr. Shen-Ming Chen
National Taipei University of Technology, Taiwan
 

IJCEA 2021 Vol.12(1): 7-11 ISSN: 2010-0221
doi: 10.18178/ijcea.2021.12.1.788

Effects ofAdding Hydrotalcite with Different Compositional Ratios in the Pyrolysis Treatment of Brominated Plastics

Kimi Hanazawa, Moemi Toritsuka, and Naoyuki Morita
Abstract—In recent years, chemical recycling technologies related to the pyrolysis of plastics into fuels have received increasing attention under the circular economy agenda with respect to resource depletion. Herein, a method is presented to reduce halogen compounds in the product oil derived from the pyrolysis of polystyrene with tetrabromobisphenol A. Analysis was undertaken to identify the bromine compounds present in the residue after the pyrolysis treatment. Pyrolysis was conducted in the presence of hydrotalcites as a function of the Mg and Al additive composition ratio (type 1; KW-1000 and type 2; K W-2000). The bromine compounds identified in the oil after pyrolysis at 400 °C were determined as 2-bromophenol, 4- bromophenol, 2,4-dibromophenol, 1- bromomethylbenzene, 2- bromomethylbenzene, and 3,6-dibromo-2,5-xylidine. In the absence of hydrotalcite, bromine compounds were still detected in the product oil, residue and gas, whereas the addition of KW-2000 reduced the concentration of bromine compounds in the product oil. The reduced concentration of the bromine compounds in the product oil is suggested to be related to the trapping of bromine by the added hydrotalcite during the pyrolysis of the plastic.

Index Terms—Brominated flame retardants, hydrotalcite, polystyrene, pyrolysis.

Kimi Hanazawa, Moemi Toritsuka, and Naoyuki Morita with with Tokyo Metropolitan High School of Science and Technology, Japan (e-mail: kimi.hanazwa@gmail.com, moemi.toritsuka@gmail.com, Naoyuki_Morita@education.metro.tokyo.jp).

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Cite: Kimi Hanazawa, Moemi Toritsuka, and Naoyuki Morita, "Effects ofAdding Hydrotalcite with Different Compositional Ratios in the Pyrolysis Treatment of Brominated Plastics," International Journal of Chemical Engineering and Applications vol. 12, no. 1, pp. 7-11, 2021.

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