Kinetics of Hydrolysis of Poly(ethylene terephthalate) Powder in Sulfuric Acid by a Modified Shrinking-Core Model

DOI Web Site 被引用文献11件
  • Toshiaki Yoshioka
    Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, Aramaki Aza Aoba 07, Aoba-ku, Sendai 980-8579, Japan
  • Tsutomu Motoki
    Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, Aramaki Aza Aoba 07, Aoba-ku, Sendai 980-8579, Japan
  • Akitsugu Okuwaki
    Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, Aramaki Aza Aoba 07, Aoba-ku, Sendai 980-8579, Japan

書誌事項

公開日
2000-11-23
DOI
  • 10.1021/ie000592u
公開者
American Chemical Society (ACS)

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説明

Poly(ethylene terephthalate) (PET) powder from waste bottles was degradated at atmospheric pressure in 3−9 M sulfuric acid below 150−190 °C for 12 h to clarify the mechanism for a feedstock recycle process. Terephthalic acid (TPA) and ethylene glycol (EG) were produced by the acid-catalyzed heterogeneous hydrolysis of PET in sulfuric acid. The TPA yield agreed with the degree of hydrolysis of PET, but the EG yield decreased with increasing sulfuric acid concentration because of carbonization of EG. The kinetics of hydrolysis of PET in sulfuric acid could be explained by a modified shrinking-core model for the chemical reaction control, in which the effective surface area is proportional to the degree of hydrolyzed PET, x, affected by formation and growth of pore and crack on PET powder. The apparent rate constant was proportional to the reciprocal of the particle size and the activity of sulfuric acid, and the activation energy was 88.7 kJ/mol.

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