Role of char during reburning of nitrogen oxides. Sixth quarterly report, January 1, 1995--March 31, 1995

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The regulations established by the Clean Air Act Amendments of 1990 in the United States mean that a single NO{sub x} control technology is not likely to be sufficient for boilers in the ozone non-attainment areas. Reburning is an emerging three-stage combustion technology designed for the reduction of NO by introducing a small amount of reburning fuel above the primary flame where the majority of NO is chemically reduced to nitrogen. While coal, in general, has not been considered an effective reburning fuel, our recent research suggested that lignite has a reburning efficiency even higher than that of methane. The ... continued below

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27 p.

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Chen, W. Y.; Ma, L. & Fan, L. T. April 30, 1995.

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Description

The regulations established by the Clean Air Act Amendments of 1990 in the United States mean that a single NO{sub x} control technology is not likely to be sufficient for boilers in the ozone non-attainment areas. Reburning is an emerging three-stage combustion technology designed for the reduction of NO by introducing a small amount of reburning fuel above the primary flame where the majority of NO is chemically reduced to nitrogen. While coal, in general, has not been considered an effective reburning fuel, our recent research suggested that lignite has a reburning efficiency even higher than that of methane. The objectives of this research are to investigate (1) the relative importance of heterogeneous and homogeneous phase reactions, and (2) the role of CaO in the catalysis of char gasification by NO in reburning environment. Experiments have been performed with a flow reactor with a simulated flue gas at a stoichiometric ratio (SR). Reburning fuels in this study include methane, Pittsburgh No. 8 bituminous coal, Mississippi lignite, North Dakota lignite, chars derived from the coal and lignites, and the bituminous coal char impregnated with Can. Chars were produced in N{sub 2} by suspending a sample basket in a 3{double_prime} tube furnace. The impregnation technique follows that developed for the catalysis of carbon oxidation.

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27 p.

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OSTI as DE95017238

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  • Other Information: PBD: 30 Apr 1995

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  • Other: DE95017238
  • Report No.: DOE/PC/93227--T5
  • Grant Number: FG22-93PC93227
  • DOI: 10.2172/95505 | External Link
  • Office of Scientific & Technical Information Report Number: 95505
  • Archival Resource Key: ark:/67531/metadc794355

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Office of Scientific & Technical Information Technical Reports

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  • April 30, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Feb. 2, 2016, 1:04 p.m.

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Chen, W. Y.; Ma, L. & Fan, L. T. Role of char during reburning of nitrogen oxides. Sixth quarterly report, January 1, 1995--March 31, 1995, report, April 30, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc794355/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.