The effects of halides on the performance of coal gas-fueled molten carbonate fuel cells: Final report, October 1986-October 1987

Technical Report · Thu Oct 01 00:00:00 EDT 1987

DOI:https://doi.org/10.2172/5259877· OSTI ID:5259877

Magee, T. P.; Kunz, H. R.; Krasij, M.; Cote, H. A.

This report presents the results of a program to determine the probable tolerable limits of hydrogen chloride and hydrogen fluoride present in the fuel and oxidant streams of molten carbonate fuel cells that are operating on gasified coal. A literature survey and thermodynamic analyses were performed to determine the likely effects of halides on cell performance and materials. Based on the results of these studies, accelerated corrosion experiments and electrode half-cell performance tests were conducted using electrolyte which contained chloride and fluoride. These data and the results of previous in-cell tests were used to develop a computer for predicting the performance decay due to these halides. The tolerable limits were found to be low (less than 1 PPM) and depend on the power plant system configuration, the operating conditions of the fuel cell stack, the cell design and initial electrolyte inventory, and the ability of the cell to scrub low levels of halide from the reactant streams. The primary decay modes were conversion of the electrolyte from pure carbonate to a carbonate-halide mixture and accelerated electrolyte evaporation. 75 figs., 16 tabs.

• Research Organization: International Fuel Cells Corp., South Windsor, CT (USA)
• DOE Contract Number: AC21-86MC23136
• OSTI ID: 5259877
• Report Number(s): DOE/MC/23136-2558; ON: DE88001058
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
MOLTEN CARBONATE FUEL CELLS
COAL GAS
PERFORMANCE
ANODES
CATHODES
CHLORIDES
CORROSION
ELECTROLYTES
FLUORIDES
FUEL CELL POWER PLANTS
HYDROCHLORIC ACID
HYDROFLUORIC ACID
INCOLOY 825
PROGRESS REPORT
STAINLESS STEEL-310
STAINLESS STEEL-316
ALLOYS
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COPPER ALLOYS
CORROSION RESISTANT ALLOYS
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
ELECTROCHEMICAL CELLS
ELECTRODES
FLUIDS
FLUORINE COMPOUNDS
FUEL CELLS
GASES
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH-TEMPERATURE FUEL CELLS
HYDROGEN COMPOUNDS
INCOLOY ALLOYS
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
POWER PLANTS
STAINLESS STEELS
STEELS
TITANIUM ALLOYS
300502* - Fuel Cells- Performance & Testing