Research Papers

Recent Development of Microceramic Reactors for Advanced Ceramic Reactor System

[+] Author and Article Information
Toshio Suzuki, Toshiaki Yamaguchi, Yoshinobu Fujishiro, Masanobu Awano

 National Institute of Advanced Industrial Science and Technology (AIST), Nagoya 463-8560, Japan

Yoshihiro Funahashi

 Fine Ceramics Research Association (FCRA), Nagoya 463-8561, Japan

J. Fuel Cell Sci. Technol 7(3), 031005 (Mar 09, 2010) (5 pages) doi:10.1115/1.3206974 History: Received June 23, 2008; Revised July 08, 2008; Published March 09, 2010; Online March 09, 2010

Ceramic reactors, which convert materials and energy electrochemically, are expected to solve various environmental problems, and the use of a microreactor design was shown to realize a high performance reactor with high thermal durability, operable at lower temperatures. Our research project, “Advanced Ceramic Reactor,” supported by the New Energy and Industrial Technology Development Organization, targets to develop new fabrication technology for such microreactors and modules using conventional, commercially available materials. In this study, fabrication technology of microtubular ceramic reactors have been investigated for aiming solid oxide fuel cell (SOFC) applications such as small distributed power generators, auxiliary power units for vehicles, and portable power sources. So far, microtubular SOFCs under a diameter of 1 mm using doped ceria electrolyte, and Ni–ceria based cermet for tubular support has been successfully developed and evaluated. The single microtubular SOFC showed a cell performance of 0.46W/cm2 (at 0.7 V) at 550°C with H2 fuel. The bundle design for such tubular cell was also proposed and fabricated. The discussion will cover the fabrication technology of a single tubular SOFC and bundle, and the optimization of the cell and bundle design by considering gas pressure loss and current collecting loss.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 1

Application of ceramic reactors: (a) fuel cell (fuel: hydrogen), (b) fuel cell (fuel: methane), (c) NOx decomposition, (d) electrolysis, (e) syngas generation, (f) oxygen pump, and (g) methanol generation

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Figure 2

Microtubular SOFC bundle design

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Figure 9

Temperature distribution of the microtubular SOFC bundle at 2 W/cc operating condition

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Figure 3

Fabrication process of microtubular SOFCs, bundles, and stacks

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Figure 4

Images of (a) microtubular SOFCs: (i) green, (ii) green with electrolyte coating, (iii) after cosintering, and (iv) complete cell (ϕ0.8 mm). (b) Microtubular SOFC bundle with five microtubular SOFCs. The volume of the bundle is 0.2 cc.

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Figure 8

Result of current collecting loss of the microtubular SOFC bundle

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Figure 5

Performance of single microtubular SOFCs with 0.8 mm diameter

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Figure 6

Performance of a microtubular SOFC bundle (five cell bundles with the volume of 0.2 cc)

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Figure 7

Pressure loss of the cathode matrix at 550°C as a function of air flow rate



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