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- W298092377 abstract "This ORNL/TM describes the sample management and chemical and physical characterization of the materials collected at the gasifier site. The feed coal, wet bottom ash, cyclone underflow, electrostatic precipitator (ESP) tar, lock hopper cyclone underflow, ash pan water, and process water were sampled periodically in the 1979-1981 heating seasons. The raw and cleaned top and bottom gases, the combined gas, and the boiler stacks also were sampled in the 1980-1981 season. The wet ash was the main recipient of the inorganic species from the feed coal. Trace elements accumulated into the wet ash by an average factor of 6.4, which is close to the factor expected from their relative ash contents. The ash pan water did not effectively leach the inorganic or organic components of the wet ash; the only elements detected in ash pan water were Fe, Zn, K, Si, and Ba, and none exceeded 2 ..mu..g/ml. The elemental analyses of the gas stream samples showed variations of as much as three orders of magnitude among samples taken at the same point, suggestive of serious difficulties in sample collection. The main elements in the combined gas stream were Cr, Pb, Ba, and Se (ranging from approx. 1 to 3000more » ..mu..g/m/sup 3/). Cr (highly variable) and Pb (approx. 6 ..mu..g/m/sup 3/) were the main elements found in the stack gases. In contrast, ammonia and cyanide in the combined gas (1800 and 200 ppm (vol./vol.), respectively) were contributed predominantly by the top gas stream. Levels of these constituents were reduced by factors of 500 to 1000 in the stack gases. The ESP tar was the main organic byproduct of the gasifier. Chemical class fraction distribution and specific compound content were typical of coal-derived liquids. The organic compounds detected in the gas streams were C/sub 2/- and C/sub 3/-alkylated benzenes, alkyl-indanes/styrenes, alkyl naphthalenes, alkyl phenols, and aliphatic hydrocarbons.« less" @default.
- W298092377 created "2016-06-24" @default.
- W298092377 creator A5007919150 @default.
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- W298092377 date "1982-09-01" @default.
- W298092377 modified "2023-09-24" @default.
- W298092377 title "Sample management and chemical/physical properties of products and effluents from the University of Minnesota-Duluth, low-Btu gasifier" @default.
- W298092377 hasPublicationYear "1982" @default.
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