Integrated methods for production of clean char and its combustion properties. Technical report, September 1, 1991--November 30, 1991

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The overall objective of this two-year program is to produce clean char using an integrated process scheme which combines physical coal cleaning, mild gasification and char oxydesulfurization. Low sulfur chars which could be used in utility boilers to meet 1995 emission standards of 2.5 lbs DO{sub 2}/MMBtu are produced from Illinois coals having emissions of >5 lbs SO{sub 2}/MMBtu. Mild gasification and low temperature oxidation studies for sulfur removal are conducted with selected coals from the Illinois Basin Coal (IBC) Sample Program in a batch fixed-bed reactor at the ISGS. Pound quantities of chars for combustion testing are prepared in … continued below

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6 p.

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DeBarr, J. A. December 31, 1991.

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The overall objective of this two-year program is to produce clean char using an integrated process scheme which combines physical coal cleaning, mild gasification and char oxydesulfurization. Low sulfur chars which could be used in utility boilers to meet 1995 emission standards of 2.5 lbs DO{sub 2}/MMBtu are produced from Illinois coals having emissions of >5 lbs SO{sub 2}/MMBtu. Mild gasification and low temperature oxidation studies for sulfur removal are conducted with selected coals from the Illinois Basin Coal (IBC) Sample Program in a batch fixed-bed reactor at the ISGS. Pound quantities of chars for combustion testing are prepared in a continuous rotary kiln reactor under optimized conditions of mild gasification and oxydesulfurization. Burning characteristics and ash deposition behaviors of desulfurized chars are determined to ensure that a useable fuel is produced. These tests are done at the University of North Dakota Energy and Environmental Research Center (UNDEERC) in a drop tube furnace (DTF), and at the US EPA in a 14 kW pilot-scale combustor. In some tests, methane is examined as an auxiliary fuel, and high-surface-area hydrated lime developed at ISGS is used to further reduce SO{sub 2} emissions. Complete analyses of the fuels are obtained to aid char desulfurization studies and help explain combustion and SO{sub 2} emission characteristics of the char. This project is a cooperative effort between the ISGS, UNDEERC and the US EPA and is cost-shared with US EPA and the US DOE through UNDEERC.

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6 p.

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OSTI; NTIS; GPO Dep.

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  • Other Information: PBD: [1991]

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  • December 31, 1991

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  • Oct. 12, 2018, 6:44 a.m.

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  • Feb. 28, 2020, 1:22 p.m.

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DeBarr, J. A. Integrated methods for production of clean char and its combustion properties. Technical report, September 1, 1991--November 30, 1991, report, December 31, 1991; Champaign, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1275037/: accessed July 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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