Characteristics of commercial selective catalytic reduction catalyst for the oxidation of gaseous elemental mercury with respect to reaction conditions

Hyun-Jo Hong; Sung-Won Ham; Moon Hyeon Kim; Seung-Min Lee; Jung-Bin Lee

Korean Journal of Chemical Engineering, Vol.27, No.4, 1117-1122, July, 2010

DOI10.1007/s11814-010-0175-x Export Citation

Characteristics of commercial selective catalytic reduction catalyst for the oxidation of gaseous elemental mercury with respect to reaction conditions

Hyun-Jo Hong, Sung-Won Ham^†, Moon Hyeon Kim¹, Seung-Min Lee², and Jung-Bin Lee²

Department of Display & Chemical Engineering, Kyungil University, Gyeongsan 712-701, Korea
¹Department of Environmental Engineering, Daegu University, Gyeongsan 712-714, Korea
²Korea Electric Power Research Institute (KEPRI), Daejeon 305-380, Korea

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The performance of V2O5/TiO2-based commercial SCR catalyst for the oxidation of gaseous elemental mercury (Hg°) with respect to reaction conditions was examined to understand the mechanism of Hg° oxidation on SCR catalyst. It was observed that a much larger amount of Hg° adsorbed on the catalyst surface under oxidation condition than under SCR condition. The activity of commercial SCR catalyst for Hg° oxidation was negligible in the absence of HCl, regardless of reaction conditions. The presence of HCl in the reactant gases greatly increased the activity of SCR catalyst for the oxidation of Hg° to oxidized mercury (Hg2+) such as HgCl2 under oxidation condition. However, the effect of HCl on the oxidation of Hg° was much less under SCR condition than oxidation condition. The activity for Hg° oxidation increased with the decrease of NH3/NO ratio under SCR condition. This might be attributed to the strong adsorption of NH3 prohibiting the adsorption of HCl which was vital species promoting the oxidation of Hg° on the catalyst surface under SCR condition.

Keywords:Mercury Oxidation;Selective Catalytic Reduction;Hydrogen Chloride;Elemental and Oxidized Mercury

[References]

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Chang JCS, Ghorishi SB, Environ. Sci. Technol., 37, 5763 (2003)
Nolan PS, Redinger KE, Amrhein GT, Kudlac GA, Fuel Process. Technol., 85(6-7), 587 (2004)
Vidic RD, Siler DP, Carbon., 39, 3 (2001)
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[2] Travis CC, Blaylock BP, Toxicol. Environ. Chem., 49, 203 (1995)

[3] U. S. Government Printing Office, Mercury study report to congress, Washington, DC (1997)

[4] U. S. Government Printing Office, A study of hazardous air pollutant from electric utility steam generating units: Final report to congress, Washington, DC (1998)

[5] U. S. Environmental Protection Agency, U. S. EPA clean air mercury rule, Washington, DC (2005)

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[7] Nolan PS, Redinger KE, Amrhein GT, Kudlac GA, Fuel Process. Technol., 85(6-7), 587 (2004)

[8] Vidic RD, Siler DP, Carbon., 39, 3 (2001)

[9] Krishnan SV, Gullett BK, Jorewlczt W, Environ. Sci. Technol., 28, 1506 (1994)

[10] Vidic RD, McLaughlin JB, J. Air Waste Manage. Assoc., 46, 241 (1996)

[11] O'Dowd WJ, Hargis RA, Granite EJ, Pennline HW, Fuel Process. Technol., 85(6-7), 533 (2004)

[12] Pitoniak E, Wu CY, Mazyck DW, Powers KW, Sigmund W, Environ. Sci. Technol., 39, 1269 (2005)

[13] Portzer JW, Albritton JR, Allen CC, Gupta RP, Fuel Process. Technol., 85(6-7), 621 (2004)

[14] Granite EJ, Pennline HW, Hargis RA, Ind. Eng. Chem. Res., 39(4), 1020 (2000)

[15] Garey T, in Proceedings of the Air and Waste Management Association’s 92nd Annual Meeting, June, Pittsburgh PA

[16] Niksa S, Fujiwara N, J. Air Waste Manage. Assoc., 55, 1866 (2005)

[17] Straube S, Hahn T, Koeser H, Appl. Catal. B: Environ., 79(3), 286 (2008)

[18] Lee C, Srivastava R, Ghorishi S, Hastings T, Stevens F, J. Air Waste Manage. Assoc., 54, 1560 (2004)

[19] Dunham GE, DeWall RA, Senior CL, Fuel Process. Technol., 82(2-3), 197 (2003)

[20] Olson ES, Miller SJ, Sharma RK, Dunham GE, Benson SA, J. Hazard. Mater., 74(1-2), 61 (2000)

[21] Kellie S, Cao Y, Duan YF, Li LC, Chu P, Mehta A, Carty R, Riley JT, Pan WP, Energy Fuels, 19(3), 800 (2005)

[22] Ghorishi S, Lee C, Jozewicz W, Kilgroe J, Environ. Eng. Sci., 22, 221 (2005)

[23] Zhao Y, Mann M, Pavlish J, Mibeck B, Dunham G, Olson E, Environ. Sci. Technol., 40, 1603 (2006)

[24] Pavlish JH, Sondreal EA, Mann MD, Olson ES, Galbreath KC, Laudal DL, Benson SA, Fuel Process. Technol., 82(2-3), 89 (2003)

[25] Meischen S and Van Pel Vt, US Patent, 6,136,281 (2000)

[26] Ham SW, Nam IS, Catalysis Vol. 16, Ed. Spivey JJ, The Royal Society of Chemistry, Cambridge, 236 (2002)

[27] Choo ST, Nam IS, Ham SW, Lee JB, Korean J. Chem. Eng., 20(2), 273 (2003)

[28] Ham SW, Nam IS, Kim YG, Korean J. Chem. Eng., 17(3), 318 (2000)

[29] Miyamoto A, Yamazaki Y, Hattori T, Inomata M, Murakami Y, J. Catal., 74, 144 (1982)

[30] Wu SC, Nobe K, Ind. Eng. Chem. Prod. Res. Dev., 16, 136 (1977)

[31] Presto AA, Granite EJ, Environ. Sci. Technol., 40, 5601 (2006)

[32] Miyamoto A, Inomata M, Yamazaki Y, Murakami Y, J. Catal., 57, 526 (1979)

[33] Inomata M, Miyamoto A, Murakami Y, J. Catal., 62, 140 (1980)