Development of 1 kW‐class Ammonia‐fueled Solid Oxide Fuel Cell Stack

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  • M. Kishimoto
    Kyoto University, Nishikyo‐ku Department of Aeronautics and Astronautics 615‐8540 Kyoto Japan
  • H. Muroyama
    Kyoto University, Nishikyo‐ku Department of Energy and Hydrocarbon Chemistry 615‐8510 Kyoto Japan
  • S. Suzuki
    Noritake Co., Ltd. 300, Higashiyama, Miyoshi‐cho, Miyoshi 470‐0293 Aichi Japan
  • M. Saito
    Noritake Co., Ltd. 300, Higashiyama, Miyoshi‐cho, Miyoshi 470‐0293 Aichi Japan
  • T. Koide
    Noritake Co., Ltd. 300, Higashiyama, Miyoshi‐cho, Miyoshi 470‐0293 Aichi Japan
  • Y. Takahashi
    Noritake Co., Ltd. 300, Higashiyama, Miyoshi‐cho, Miyoshi 470‐0293 Aichi Japan
  • T. Horiuchi
    Nippon Shokubai Co., Ltd. 5‐8, Nishiotabi‐cho, Suita 564‐8512 Osaka Japan
  • H. Yamasaki
    Nippon Shokubai Co., Ltd. 5‐8, Nishiotabi‐cho, Suita 564‐8512 Osaka Japan
  • S. Matsumoto
    Toyota Industries Corporation 8, Chaya, Kyowa‐cho, Obu 474‐8601 Aichi Japan
  • H. Kubo
    Toyota Industries Corporation 8, Chaya, Kyowa‐cho, Obu 474‐8601 Aichi Japan
  • N. Takahashi
    Mitsui Chemicals Inc. 580‐32, Nagaura, Sodegaura 299‐0265 Chiba Japan
  • A. Okabe
    Mitsui Chemicals Inc. 580‐32, Nagaura, Sodegaura 299‐0265 Chiba Japan
  • S. Ueguchi
    IHI Corporation 1, Shinnakahara‐cho, Isogo‐ku, Yokohama 235‐8501 Kanagawa Japan
  • M. Jun
    IHI Corporation 1, Shinnakahara‐cho, Isogo‐ku, Yokohama 235‐8501 Kanagawa Japan
  • A. Tateno
    IHI Corporation 1, Shinnakahara‐cho, Isogo‐ku, Yokohama 235‐8501 Kanagawa Japan
  • T. Matsuo
    IHI Corporation 1, Shinnakahara‐cho, Isogo‐ku, Yokohama 235‐8501 Kanagawa Japan
  • T. Matsui
    Kyoto University, Nishikyo‐ku Department of Energy and Hydrocarbon Chemistry 615‐8510 Kyoto Japan
  • H. Iwai
    Kyoto University, Nishikyo‐ku Department of Aeronautics and Astronautics 615‐8540 Kyoto Japan
  • H. Yoshida
    Kyoto University, Nishikyo‐ku Department of Aeronautics and Astronautics 615‐8540 Kyoto Japan
  • K. Eguchi
    Kyoto University, Nishikyo‐ku Department of Energy and Hydrocarbon Chemistry 615‐8510 Kyoto Japan

Description

<jats:title>Abstract</jats:title><jats:p>Power generation performance and long‐term durability of ammonia‐fueled solid oxide fuel cell (SOFC) systems are investigated with SOFC stacks consisting of 30 planar anode‐supported cells. SOFC systems with three different operation modes are employed: direct ammonia, external decomposition and autothermal decomposition. A novel BaO/Ni/Sm<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>/MgO catalyst is newly developed for the external ammonia cracker, whereas a Co‐Ce‐Zr composite oxide catalyst is used for the autothermal ammonia cracker. Initial performance measurement and 1,000 h long‐term durability test of the stacks are conducted. The stack fueled with direct ammonia achieves 1 kW power output with 52% direct current (DC) electrical efficiency; a slight decrease in its performance compared with the stack with the mixture fuel of hydrogen and nitrogen is attributed to the decrease in the stack temperature caused by the endothermic ammonia decomposition reaction. The external ammonia cracker helps to maintain the stack temperature, improving the initial performance of the stack. The stack performance with the autothermal ammonia cracker is also comparable to those with the other operation modes. It is also demonstrated that the stacks fueled with ammonia have excellent stability during the long‐term tests and 57% energy conversion efficiency at ca. 700 W electrical output is achieved with the external ammonia cracker.</jats:p>

Journal

  • Fuel Cells

    Fuel Cells 20 (1), 80-88, 2020-01-22

    Wiley

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