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Research Papers

Numerical Analysis of the Possibility of Carbon Formation in Planar SOFC Fueled With Syngas

[+] Author and Article Information
Jianguo Yu, Shilie Weng

School of Mechanical Engineering, Key Laboratory for Power Machinery and Engineering of Ministry of Education,  Shanghai Jiao Tong University, 800 Dong Chuan Rd., Shanghai 200240, P. R. C.

Yuzhang Wang1

School of Mechanical Engineering, Key Laboratory for Power Machinery and Engineering of Ministry of Education,  Shanghai Jiao Tong University, 800 Dong Chuan Rd., Shanghai 200240, P. R. C.yuzhangwang@yahoo.com.cn

1

Corresponding author.

J. Fuel Cell Sci. Technol 9(2), 021011 (Mar 19, 2012) (6 pages) doi:10.1115/1.4005625 History: Received May 25, 2011; Revised October 26, 2011; Published March 09, 2012; Online March 19, 2012

As one of the most important energy sources, coal can be gasified to syngas in order for it be used in solid oxide fuel cell (SOFC) efficiently and cleanly. However, the big challenge of the utilization of the syngas in SOFC is the carbon formation activity in the Ni/YSZ anode. In this work, according to the fully three-dimensional models of chemical/electrochemical, heat/mass transfer and overpotential, the effects of fuel components on the performance and carbon formation of SOFC were analyzed. From the results, the increment of water steam and carbon dioxide may inhibit the carbon deposition. However, massive water steam and carbon dioxide reduces the output voltage of SOFC as well. The proper molar fraction of hydrogen in syngas also reduces the carbon formation activity. The addition of carbon monoxide may narrow down the region of carbon formation but enhance the carbon formation activity near the fuel inlet of SOFC. Moreover, the existence of methane results in the sharply carbon formation; thus, the methane should be removed as clear as possibly in syngas.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Determination of carbon formation

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Figure 2

The schematic view of planar electrode supported SOFC

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Figure 3

The effect of CO molar fraction on the carbon formation

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Figure 4

The effect of H2 molar fraction on the carbon formation

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Figure 5

The effect of CO2 molar fraction on the carbon formation

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Figure 6

The effect of H2 O molar fraction on the carbon formation

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Figure 7

The effect of CH4 molar fraction on the carbon formation

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Figure 8

The change of output voltage with the variation of species molar fraction

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