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Separation of supercritical fluid mixtures with a membrane process

Research Project

Project/Area Number 02453111
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 化学工学
Research InstitutionDepartment of material science and chemical engineering, Yokohama National University

Principal Investigator

OHYA Haruhiko  Yokohama National University, Professor, 工学部, 教授 (40017950)

Co-Investigator(Kenkyū-buntansha) MATSUMOTO Kanji  Yokohama National University, Professor, 工学部, 教授 (30011224)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1991: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1990: ¥3,700,000 (Direct Cost: ¥3,700,000)
KeywordsMembrane / Gas separation / Supercritical fluid / Polyimide / Polyamic acid / Asymmetric / High temperature / polyimide / polyamic acid
Research Abstract

Asymmetric polyamide Kapton^R membrane was made by casting a solution of 18 wt% polyamic acid and 5 wt% phenanthrene in dimethylacetainide at 70゚C with a four-minutes evaporation time. Usine this membrane, a separation factor alpha_<ethanol/CO2>, 8.7 was obtained at 373 K and 15 MPa and 6.5 at 423 K and 15 MPa for the experimemt involving the separation of gaseous mixtures Of CO_2 and ethanol with a concentration ratio of 15 : 1. Its value at 373 K is 1.3 times higher than at 423 K, and increases with total pressure, while the separation factor at 423 K remains constant with pressure.
The activation energies of permeability were 2.6 kj/mol for ethanol and 7.1 kj/mol for supercritical CO_2・These values are very small compared to those of 48 kj/mol for ethanol and 25 kj/mol for CO_2 with the symmetric polyamide membrane. Supercritical fluid permeation experiment might be the best method to determine the permeation mechanism whether pore flow model or solution-diffusion model, from the measurement of activation energy of permeation.
From the data obtained, a calculation was carried out to determine the required membrane area for 90% recovery of ethanol from mixtures with an initial concentration of 1 mol% and a feed rate of 36 mol/h. This area is 0.82 m^2 for separations conducted at 10 MPa and 373 K and 0.28 m^2 at 15 MPa and 373 K. And three quarters of operating energy of pressurization might be saved. Therefore, the process integrated with membrane recovery could save operating energy about 3/4 and the size of the main compressor will be reduced to 1/4 theoretically.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 大矢 晴彦,二村 泰行,市原 毅,根岸 洋一,松本 幹治: "気体分離用ポリイミド非対称膜の研究 第一報 製膜法の基礎" 膜. 15. 139-146 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 大矢 晴彦,市原 毅,東島 健,根岸 洋一: "気体分離用ポリイミド非対称膜の研究 第二報 蒸発時間の影響" 膜. 17. 42-47 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S.I.Semenova,H.Ohya,T.Higashijima,Y.Negishi: "Dependence of permeability througt the polyimide membranes on state of gas,vapor,liquid and supercritical fluid at high temperature" Journal of Membrane Science. 67. 29-38 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S.I.Semenova,H.Ohya,T.Higashijima,Y.Negishi: "Effect of viscosity coagulant on asymmetric polyimide (PMDA-4,4'-ODA) membrane preparation" Membrane. 17. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S.I.Semenova,H.Ohya,T.Higashijima,Y.Negishi: "Separation of supercritical CO_2 and ethanol mixtures with an asymmetric polyimide membrane" submitted to Journal of Membrane Science.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Haruhiko Ohya, Hiroyuki Futamura, Takeshi Ichihara, Youichi Negishi, Kanji Matsumoto: ""Research of Polyamide Asymmetric Membrane for Gas Separation", Fundamental preparation of polyamide asymmetric membrane for gas separation" Membrane. 15(3). 139-146 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Haruhiko Ohya, Takeshi Ichihara, Tsuyoshi Higashijima, Youichi Negishi: ""Research of Polyamide Asymmetric Membrane for Gas Separation II", The effect of evaporation period" Membrane. 17(1). 42-47 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. I. Semenova, H. Ohya, T. Higashijima, Y. Negishi: ""Dependence of permeability through the polyimide membranes on stane of gas, vapor, liquid and supercritical fluid at high temperature"" Journal of Membrane Science. 67. 29-38 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. I. Semnova, H. Ohya, T. Higashijima, Y. Negishi: ""Effect of viscosity coagulant on asymmetric polyamide (PMDA-4, 4'-ODA) membrane preparation"" Membrane. 17(3). (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. I. Semenova, H. Ohya, T. Higashijima, Y. Negishi: ""Separation of supercritical CO_2 and ethanol mixtures with an asymmetric polyimide membrane"" Journal of Membrane Science.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 大矢 晴彦,市原 毅,東島 健,根岸 洋一: "気体分離用ポリイミド非対称膜の研究 第2報 蒸発時間の影響" 膜. 17. 42-47 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] S.I.Semenova,H.Ohya,T.Higashijima and Y.Negishi: "Dependence of permeability through polyimide membranes on state of gas,vapor,liquid and supercritical fluid at high temperature." Journal of Membrane Science. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 大矢 晴彦・二村 秀行・市原 毅・根本 洋一・松本 幹治: "気体分離用ポリイミド非対称膜の研究 第1報 製膜法の基礎" 膜. 15. 139-146 (1990)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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