Biosyngas Utilization in Solid Oxide Fuel Cells With NiGDC Anodes

[+] Author and Article Information
J. P. Ouweltjes

 Energy Research Centre of the Netherlands ECN, P.O. Box 1, 1755 ZG Petten, The Netherlandsouweltjes@ecn.nl

P. V. Aravind, N. Woudstra

Energy Technology Section, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands

G. Rietveld

 Energy Research Centre of the Netherlands ECN, P.O. Box 1, 1755 ZG Petten, The Netherlands

J. Fuel Cell Sci. Technol 3(4), 495-498 (Mar 22, 2006) (4 pages) doi:10.1115/1.2349535 History: Received November 30, 2005; Revised March 22, 2006

The combination of biomass gasification systems with fuel cells promises adequate systems for sustainable, decentralized energy conversion. Especially high temperature fuel cells are suited for this task because of their higher tolerance to impurities, their internal steam reforming potential, and favorable thermal integration possibilities. This paper presents the results of biosyngas utilization in solid oxide fuel cells with NiGDC anodes at 850 and 920°C. The relation between the fuel composition and the electrochemical performance is discussed, as well as the impact of sulfur up to a concentration of 9ppmH2S. The investigations have made clear that NiGDC anodes can be operated within a wide range of biosyngas compositions. Sulfur has appeared to deactivate the anode for methane reforming. The oxidation of hydrogen and carbon monoxide are insensitive to sulfur, suggesting that both nickel and GDC are active electrocatalysts.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 6

Typical impedance spectrum (Nyquist plot) obtained at 850°C on a SOFC membrane

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Figure 5

Impact of sulfur on the performance. The fuel compositions are explained in Table 1.

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Figure 4

Impact of CO2 and H2O addition on the performance under methane

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Figure 3

Performance after partial substitution of hydrogen with CO

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Figure 2

Impact of N2, H2O, and CO2 addition on the performance under hydrogen

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Figure 1

Micrographs of the used SOFC electrodes (anode left, cathode right)

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Figure 7

Rs, Rp1, and Rp2 as a function of reactant activity at 850°C

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Figure 8

Electrochemical performance at 850 and 920°C under biosyngas from an air-blown gasifier

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Figure 9

Electrochemical performance at 850 and 920°C under biosyngas from a steam-blown gasifier



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