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China-Japan Workshop on Solid Oxide Fuel Cells

Development of Evaluation Technologies for Microtubular SOFCs Under Pressurized Conditions

[+] Author and Article Information
S. Hashimoto, Y. Liu, K. Asano, M. Mori

 Central Research Institute of Electric Power Industry (CRIEPI), 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japan

H. Nishino1

 Central Research Institute of Electric Power Industry (CRIEPI), 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japan

Y. Funahashi

 Fine Ceramics Research Association (FCRA), AIST, Shimo-shidami, Moriyama-ku, Nagoya 463-8561, Japan

Y. Fujishiro

 Advanced Industrial Science and Technology (AIST), Shimo-shidami, Moriyama-ku, Nagoya 463-8561, Japan

1

Present address: Clean Energy Research Center, University of Yamanashi.

J. Fuel Cell Sci. Technol 5(3), 031208 (May 27, 2008) (5 pages) doi:10.1115/1.2930765 History: Received August 09, 2007; Revised October 14, 2007; Published May 27, 2008

We developed evaluation technologies for microtubular solid oxide fuel cells under pressurized conditions. The pressurized cell evaluation system for the single cell was produced. The chamber temperature of the evaluation system can be controlled up to 750°C, and the maximum chamber pressure is 0.8MPa. It was possible to manually control the pressure difference between air and fuel gas within ±3kPa during the pressure increase. The hard sealing technique was introduced for the evaluation under pressurized conditions. Using two different types of commercial inorganic ceramic adhesives, the gas leakage was controlled at approximately 2%. Differential pressure control between fuel and air is effective for the stable open circuit voltage and power generation. The power generation under pressurized conditions was successful at 650°C, and the pressurized effect was clearly confirmed.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

The developed microtubular cells in the Advanced Ceramic Reactor Project. (a) Microtubular single cells with zirconia electrolyte. (b) A bundle of microtubular cells, “ceramic reactor cube,” with ceria electrolyte.

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Figure 2

The pressurized cell evaluation system for a microtubular single cell. (a) External view of the equipment. (b) Pressurized reaction chamber.

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Figure 3

The schematic diagram of the pressurized cell evaluation system

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Figure 4

The single cell holder for the pressurized cell evaluation system. (a) The inside of the pressurized reaction chamber. (b) Cell holder.

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Figure 5

Gas flow and probe connections for power generation of a singe microtubular cell

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Figure 6

Chemical compatibility between Aron ceramics C and cell components (after heat treatment at 700°C for 10h)

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Figure 7

Surface of the sealing materials after heat treatment at 700°C. (a) Aron ceramics C. (b) Aron ceramics CC.

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Figure 8

Cross section of Aron ceramics CC on Aron ceramics C after heat treatment at 700°C

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Figure 9

The OCV control by the differential pressure between fuel gas and air. Vth: theoretical OCV.

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Figure 10

Power generation curves for a microtubular single cell under pressurized conditions

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Figure 11

The pressurized cell evaluation system for a bundle/module. (a) Gas and temperature control section. (b) Reaction chamber and chamber pressure control section. (c) Electrochemical analysis section.

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Figure 12

The cube holder for the pressurized cell evaluation system

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