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Some Studies on a Solid‐State Sulfur Probe for Coal Gasification Systems
Author(s) -
Κ. T. Jacob,
D. Bhogeswara Rao,
H. G. Nelson
Publication year - 1978
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1.2131543
Subject(s) - sulfur , nernst equation , fluoride , chemistry , sulfide , calcium oxide , fluorine , electrolyte , inorganic chemistry , calcium , coal , solid oxide fuel cell , coal gasification , electrode , mineralogy , organic chemistry
Measurements on the solid electrolyte cell (Ar + H/sub 2/ + H/sub 2/S/CaS + CaF/sub 2/ + (Pt)//CaF/sub 2///(Pt) + CaF/sub 2/ + CaS/H/sub 2/ + H/sub 2/+Ar) show that the emf of the cell is directly related to the difference in sulfur potentials established at the Ar + H/sub 2/ + H/sub 2/S/electrode interfaces. The electrodes convert the sulfur potential gradient across the calcium fluoride electrolyte into an equivalent fluorine potential gradient. Response time of the probe varies from approximately 9 hr at 990/sup 0/K to 2.5 hr at 1225/sup 0/K. The conversion of calcium sulfide and/or calcium fluoride into calcium oxide is not a problem anticipated in commercial coal gasification systems. Suggestions are presented for improving the cell for such commercial applications.

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