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Behavior of sulfur and chlorine in coal during combustion and boiler corrosion. Final technical report, September 1, 1991--August 31, 1992 [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
34 pages : digital, PDF file
Additional Creators
United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Using the pyrolysis-QGA system, samples of coal were heated from ambient temperature to 800°C at a rate of 20°C/min in the pyrolysis chamber under a nitrogen atmosphere. The volatile products were carried with the nitrogen flow to the combustion chamber which was maintained at 850°C under a constant flow of oxygen. For Illinois coals (IBC-101, 103, and -109), HCl was the only chlorine species identified by the QGA. The HCl release profiles for the coals showed a broad peak between 250°C and 600°C with a maximum at 445°C. Neutron activation analysis of pyrolysis residues showed that 98 percent of the chlorine in raw coal was volatilized. Thus, it may be inferred that the chlorine in Illinois coals is released rapidly as HCl, not as sodium chloride (NaCl), during combustion in a utility/industrial boiler. In contrast to chlorine, the sulfur release profile for IBC-109 showed three peaks: the first sulfur peak at about 350°C was probably derived from elemental sulfur, the main peak at 475°C corresponded to the release of organic sulfur, and the third peak at 600°C resulted from the decomposition of pyrite. The low-temperature peak was absent for fresh samples. Sulfur dioxide (SO₂) was the major sulfur species in combustion gases under an oxidizing condition; additional gaseous sulfur species (COS and H₂S) were observed when the atmosphere was changed to a reducing condition.
Report Numbers
E 1.99:doe/pc/91334--t136
doe/pc/91334--t136
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
12/31/1992.
"doe/pc/91334--t136"
"DE94005737"
"AV0100000"
Chou, C.L.; Cao, J.; Pan, W.P.; Donnals, G.L.; Ruch, R.R.; Shao, D.; Hackley, K.C.
Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
Type of Report and Period Covered Note
Final; 01/01/1991 - 12/31/1992
Funding Information
FG22-91PC91334
View MARC record | catkey: 13840587