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Title: Effects of H/sub 2/S on molten carbonate fuel cells. Progress report, January 1-March 31, 1985

Abstract

The overall program objective is to identify the poisoning mechanisms responsible for performance losses observed in molten carbonate fuel cells (MCFC) operating on sulfur-containing gases. The first phase investigated the impact of sulfide contaminants upon the fuel cell electrochemistry. The second phase addresses the influence of contaminants on important heterogeneous reactions such as the water-gas-shift reaction and the steam reforming of hydrocarbons which are catalyzed internally by fuel cell hardware. The third phase seeks to operate bench-scale fuel cells (100 cm/sup 2/ electrode area) under conditions simulating the operation of a MCFC stack having fuel recycle to provide CO/sub 2/ to the oxidant. Preliminary analysis of data from experiments conducted at 3 and 5 atmospheres pressure indicates that the impact on fuel cell performance of H/sub 2/S contaminants in the fuel and SO/sub 2/ contaminants in the oxidant decreases as the pressure is increased. In tests conducted at atmospheric pressure simulating the use of spent fuel exhaust as a source of carbon dioxide for the cathode gases, it was determined that a bench-scale fuel cell having anodes composed of a porous metal plaque, 90% nickel and 10% chromium, can be successfully operated on fuel containing 1 ppM H/sub 2/S andmore » oxidant containing 1 ppM SO/sub 2/ with less than a 1% loss in performance. When contamination was increased to 2 ppM H/sub 2/S and 2 ppM SO/sub 2/ in fuel and oxidant streams respectively, a 4% decrease in performance was noted over the first 100 hours, 30 mV at 200 mA/cm/sup 2/. Stable performance was observed thereafter, however, and no further loss was experienced. When all sources of contamination were removed, cell performance returned to the original level observed with clean gas streams. 3 refs., 3 figs., 2 tabs.« less

Authors:
Publication Date:
Research Org.:
Institute of Gas Technology, Chicago, IL (USA)
OSTI Identifier:
6471579
Report Number(s):
DOE/MC/20212-1962
ON: DE86003469
DOE Contract Number:  
AC21-83MC20212
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; MOLTEN CARBONATE FUEL CELLS; PERFORMANCE TESTING; POISONING; PRESSURE DEPENDENCE; ANODES; CATALYSTS; CATHODES; EXPERIMENTAL DATA; HYDROGEN SULFIDES; MATHEMATICAL MODELS; SHIFT PROCESSES; SULFUR DIOXIDE; CHALCOGENIDES; DATA; DIRECT ENERGY CONVERTERS; ELECTROCHEMICAL CELLS; ELECTRODES; FUEL CELLS; HIGH-TEMPERATURE FUEL CELLS; HYDROGEN COMPOUNDS; INFORMATION; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; SULFIDES; SULFUR COMPOUNDS; SULFUR OXIDES; TESTING; 300502* - Fuel Cells- Performance & Testing

Citation Formats

Remick, R J. Effects of H/sub 2/S on molten carbonate fuel cells. Progress report, January 1-March 31, 1985. United States: N. p., 1985. Web.
Remick, R J. Effects of H/sub 2/S on molten carbonate fuel cells. Progress report, January 1-March 31, 1985. United States.
Remick, R J. Fri . "Effects of H/sub 2/S on molten carbonate fuel cells. Progress report, January 1-March 31, 1985". United States.
@article{osti_6471579,
title = {Effects of H/sub 2/S on molten carbonate fuel cells. Progress report, January 1-March 31, 1985},
author = {Remick, R J},
abstractNote = {The overall program objective is to identify the poisoning mechanisms responsible for performance losses observed in molten carbonate fuel cells (MCFC) operating on sulfur-containing gases. The first phase investigated the impact of sulfide contaminants upon the fuel cell electrochemistry. The second phase addresses the influence of contaminants on important heterogeneous reactions such as the water-gas-shift reaction and the steam reforming of hydrocarbons which are catalyzed internally by fuel cell hardware. The third phase seeks to operate bench-scale fuel cells (100 cm/sup 2/ electrode area) under conditions simulating the operation of a MCFC stack having fuel recycle to provide CO/sub 2/ to the oxidant. Preliminary analysis of data from experiments conducted at 3 and 5 atmospheres pressure indicates that the impact on fuel cell performance of H/sub 2/S contaminants in the fuel and SO/sub 2/ contaminants in the oxidant decreases as the pressure is increased. In tests conducted at atmospheric pressure simulating the use of spent fuel exhaust as a source of carbon dioxide for the cathode gases, it was determined that a bench-scale fuel cell having anodes composed of a porous metal plaque, 90% nickel and 10% chromium, can be successfully operated on fuel containing 1 ppM H/sub 2/S and oxidant containing 1 ppM SO/sub 2/ with less than a 1% loss in performance. When contamination was increased to 2 ppM H/sub 2/S and 2 ppM SO/sub 2/ in fuel and oxidant streams respectively, a 4% decrease in performance was noted over the first 100 hours, 30 mV at 200 mA/cm/sup 2/. Stable performance was observed thereafter, however, and no further loss was experienced. When all sources of contamination were removed, cell performance returned to the original level observed with clean gas streams. 3 refs., 3 figs., 2 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/6471579}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {11}
}

Technical Report:
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