Effects of H2S and SO2 in the simulated coal combustion flue gas for elementary mercury vapor removal over activated carbons

Md Azhar Uddin, Yuki Yamaji, Toru Yamada, Shengji Wu, Eiji Sasaoka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work we studied the effects of gas composition, particularly of H2S and SO2, on the Hg° removal performance of various un-impregnated activated carbons (ACs) using simulated coal combustion flue gas. Gas-phase Hg° removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100 °C. The simulated flue gases had a composition of Hg° (4.9 ppb), H2S (0 or 1 or 20 ppm), SO2 (0 or 487 ppm), CO2 (10%), H 2O (4.7%), O2 (5%) and N2 (balance gas). ACs prepared from pitch and petroleum fly ash and coal fly ash exhibited a similar Hg removal capacity as the coconut shell AC. The presence of 20 ppm H2S and 487 ppm of SO2 in the simulated flue gases increased the Hg° removal capacity of the ACs significantly. However the effect of 1 ppm H2S in the presence of SO2 depended on the type of AC. Hg° removal capacity of coconut shell AC increased even in the presence 1 ppm H2S but there was no effect of 1 ppm H2S on the Hg° removal performance of fly ash ACs.

Original languageEnglish
Title of host publication22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005
Pages1654-1661
Number of pages8
Publication statusPublished - Dec 1 2005
Event22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005 - Pittsburgh, PA, United States
Duration: Sep 12 2005Sep 15 2005

Publication series

Name22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005
Volume2

Other

Other22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005
CountryUnited States
CityPittsburgh, PA
Period9/12/059/15/05

Keywords

  • Activated Carbon
  • Coal combustion flue gas
  • HS
  • Removal of elemental mercury

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Uddin, M. A., Yamaji, Y., Yamada, T., Wu, S., & Sasaoka, E. (2005). Effects of H2S and SO2 in the simulated coal combustion flue gas for elementary mercury vapor removal over activated carbons. In 22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005 (pp. 1654-1661). (22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005; Vol. 2).