A novel carbon-based process for flue gas cleanup. Third quarterly technical progress report, January 1--March 31, 1992

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The objective of this project is to demonstrate the preliminary technical and economic feasibility of a novel carbon-based process for removal of at least 95% SO{sub 2} and at least 75% NO{sub x} coal combustion flue gas. In the process, flue gas leaving the electrostatic precipitator (ESP) is passed through a trickle bed of achieved carbon catalyst employing a periodic flush of low strength sulfuric acid. The SO{sub 2} is oxidized to SO{sub 3} and removed as medium strength sulfuric acid. The SO{sub 2}-free flue gas is then mixed with NH{sub 3}, and the NO{sub x} in the gas is ... continued below

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20 p.

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Gangwal, S. K. & Silveston, P. L. April 1, 1992.

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  • Research Triangle Institute
    Publisher Info: Research Triangle Inst., Research Triangle Park, NC (United States)
    Place of Publication: Research Triangle Park, North Carolina

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Description

The objective of this project is to demonstrate the preliminary technical and economic feasibility of a novel carbon-based process for removal of at least 95% SO{sub 2} and at least 75% NO{sub x} coal combustion flue gas. In the process, flue gas leaving the electrostatic precipitator (ESP) is passed through a trickle bed of achieved carbon catalyst employing a periodic flush of low strength sulfuric acid. The SO{sub 2} is oxidized to SO{sub 3} and removed as medium strength sulfuric acid. The SO{sub 2}-free flue gas is then mixed with NH{sub 3}, and the NO{sub x} in the gas is subjected to selective catalytic reduction (SCR) to N{sub 2} over a fixed bed of activated carbon catalyst. The experimental work is divided between Research Triangle Institute (RTI) and the University of Waterloo (Waterloo). RTI will conduct the NO{sub x} removal studies, whereas Waterloo will conduct the SO{sub 2} removal studies. The ultimate goal of the project is to demonstrate that the process can be reduce the cost of electricity by 20% over conventional SCR/flue gas desulfurization (FGD) processes. In the present quarter, the continuous SO{sub 2} analyzer system at Waterloo was completed. The SO{sub 2} removal factorial experiments were begun Waterloo with the BPL carbon at 21{degrees}C. Also, SO{sub 2} removal was tested on two catalyst at RTI at 80{degrees}C. NO{sub x} conversion was tested on a variety of catalysts at RTI. It was shown that the BPL carbon could remove over 95% SO{sub 2} at 21{degrees}C but would required several beds at space velocity in each bed of abut 1,500 scc/(cc{center_dot}h) to reduce SO{sub 2} from 2,500 ppm to 100 ppm. A modified carbon catalyst tested at RTI showed 99% SO{sub 2} removal at 80{degrees}C at 1,400 scc/(cc{center_dot}h). Also, it was possible to produce nearly 9 normal H{sub 2}SO{sub 4} by periodic flushing of this catalyst. The modified carbon catalyst also demonstrated removal of more than 80% NO{sub x}. 7 refs., 7 figs., 4 tabs.

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20 p.

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OSTI; NTIS; GPO Dep.

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  • Other Information: PBD: Apr 1992

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  • Other: DE92016680
  • Report No.: DOE/PC/91345--T5
  • Grant Number: AC22-91PC91345
  • DOI: 10.2172/10156537 | External Link
  • Office of Scientific & Technical Information Report Number: 10156537
  • Archival Resource Key: ark:/67531/metadc1315341

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  • April 1, 1992

Added to The UNT Digital Library

  • Nov. 3, 2018, 11:47 a.m.

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  • Nov. 16, 2018, 6:53 p.m.

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Gangwal, S. K. & Silveston, P. L. A novel carbon-based process for flue gas cleanup. Third quarterly technical progress report, January 1--March 31, 1992, report, April 1, 1992; Research Triangle Park, North Carolina. (https://digital.library.unt.edu/ark:/67531/metadc1315341/: accessed March 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.