Pyrolysis of Polystyrene -Prediction of Product Yield-

DOI Web Site 3 Citations
  • KUROKI Takeshi
    Department of Industrial Chemistry, Faculty of Science and Engineering, Nihon University
  • SAWAGUCHI Takashi
    Department of Industrial Chemistry, Faculty of Science and Engineering, Nihon University
  • IKEBAYASHI Nobuhiko
    Department of Industrial Chemistry, Faculty of Science and Engineering, Nihon University
  • IKEMURA Tadashi
    Department of Industrial Chemistry, Faculty of Science and Engineering, Nihon University
  • SAKIKAWA Noriyuki
    Department of Industrial Chemistry, Faculty of Science and Engineering, Nihon University

Bibliographic Information

Other Title
  • ポリスチレンの熱分解反応 ―生成物収率の予測―
  • 合成高分子材料の熱分解に関する研究　ＩＩＩ　　ポリスチレンの熱分解反応　　生成物収率の予測

Description

By deriving an experimental equation, IF=TθE, of intensity function (IF is essentially an estimate of the temperature required to attain a certain degree of thermal cracking with in the residence time of 1 sec), the product yield was estimated; the evaluation of exponential term "a" in the equation and the identification of the products with higher molecular weight, called heavy oils, were carried out.<BR>Three kinds of dimers containing 2, 4-diphenyl-1-butene were found.<BR>The degradation was roughly classified into following two steps.<BR>(I) Decrease in heavy oils and increase in styrene monomer.<BR>(II) Decrease in styrene monomer and increase in by-products.<BR>As the steam dilution ratio is not important, operating factors were restricted to reaction temperature and residence time. For a given yield of the product, they were interchangeable.<BR>IF is dependent only upon reaction temperature and residence time and 4, with reference to styrene monomer, is expressed by the following equations:<BR>Difference in "a" value for the above two steps shows that the residence time is important during the degradation process of higher molecular weight materials and this method was suggested also to be applicable to the initial stage of degradation.<BR>As IF correlates with product yields (as shown in Figs.9 and 10), the product yield can be successfully predicted by an appropriate choice of pyrolysis conditions.<BR>IF in (I) will be applicable to the pyrolysis process to obtain styrene monomer.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1976 (11), 1766-1772, 1976-11-10

    The Chemical Society of Japan

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