Phase Equilibrium Model for the Separation of Ethanol-Water Solution Using Super- and Subcritical Propane Solvent Extraction

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Itsuo Yamamoto²  Hirotoshi Horizoe²  Tetsuya Tanimoto²  Yoshikazu Kano¹ 

[1] Yokohama Dockyard & Machinery Works, Mitsubishi Heavy Industries, Ltd.;Hiroshima Research & Development Center, Mitsubishi Heavy Industries, Ltd.

关键词: Phase Equilibrium;    High-Pressure Extraction;    Supercritical Gas Extraction;    Condensation;    Distillation;    Propane;    Ethanol;    Water;   

DOI  :  10.1252/jcej.26.482

来源: Maruzen Company Ltd

【 摘 要 】

References(20)Cited-By(4)To dehydrate a fermented or synthetic crude ethanol using super- and subcritical propane solvent extraction, we previously measured phase equilibrium data for the C3H8-C2H5OH-H2O system9). In this work the applicability of phase equilibrium models was examined using existing well-known PT-EOS, GC-EOS and a NRTL-NRTL solution models.The estimations of binary phase equilibria by these models are relatively accurate, except for PT-EOS, using the random mixing rule. It is found that the solution model NRTL-NRTL is the most practicable one for the C3H8-C2H5OH-H2O ternary system at the extraction stage. At the propane azeotropic distillation stage, GC-EOS gives the most accurate estimation. Although it is a little less practicable, it can be used for design concept. At the propane stripping stage, any equation-of-state method is sufficiently practicable.

【 授权许可】

Unknown