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1991 Fiscal Year Final Research Report Summary

Development for Three-Phase Fluidized Bed Fuel Cell System

Research Project

Project/Area Number 01850206
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 反応工学
Research InstitutionUniversity of Tokyo

Principal Investigator

YOSHIDA Kunio  University of Tokyo Dept. of Chem. Eng., Professor, 工学部, 教授 (70010808)

Co-Investigator(Kenkyū-buntansha) TSUTSUMI Atsushi  University of Tokyo Dept. of Chem. Eng., Lecturer, 工学部, 講師 (00188591)
Project Period (FY) 1989 – 1991
KeywordsAlkaline fuel cell / Fluidized-bed electrode / Three-phase fluidized bed
Research Abstract

The conventional fuel cell design employs electrodes in the shape of plates, so that there is naturally a limit of current density. The structure of cell stuck is quite complex, and furthermore there is no scale-up merit. To overcome these disadvantages of conventional fuel cell systems, we applied a fluidized bed electrode to the fuel cell. The fluidized bed electrode has a larger electrode area per volume and can conveniently be scaled-up.
In this study, the performance of a fluidized-bed hydrogen electrode and a fluidized-bed oxygen electrode was investigated for an alkaline fuel cell. The effects of gas velocity, KOH concentration, type of electrode particles and size of collector electrode on the cell current were examined in the three-phase fluidized beds. In addition, the experiments were carried out to measure volumetric gas-liquid mass transfer coefficient.
In conclusion :
1) The fluidized-bed hydrogen electrode behaves nearly ideally. On the other hand, the fluidized-bad oxygen electrode does not behave ideally because of the catalytic decomposition of peroxyl ions.
2) The ohmic polarization is governed by the contact resistance between the collector electrode and the electrode particles.
3) The effects of particle size and solid concentration on mass transfer coefficients appeared differently in three types of reactors, which are classified by solid concentration profiles.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Tawatchai Charinpanitkul: "Gas-Liquid Mass Transfer in a Three-Phase Reactor." Proc.2nd Japanese/German Sympo.Bubble Columns. 201-206 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Atsushi Tsutsumi: ""Characteristics of Fluidized-Bed Electrode for Alkaline Fuel Cell"" AIChEJ.,. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Atshushi Tsutsumi: "Tomoko Suzuki and Kunio Yoshida Characteristics of Fluidized-Bed Electrode for Alkaline Fuel Cell" AIChE Annual Meeting, Los Angeles. 17-22. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tawatchai Charinpanitkul: "Atshushi Tsutsumi and Kunio Yoshida Mass Transfer in a Three-Phase Rractor" Proc. 2nd Japanese/German Sympo. Bubble Column. (Kyoto). 201 (1991)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-16  

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