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Deactivation of SCR Catalysts Applied in Power Plants  

Lee, Jung-Bin (Green Growth Lab., Korea Electric Power Research Institute)
Kim, Dong Wha (Green Growth Lab., Korea Electric Power Research Institute)
Lee, Chang-Yong (Department of Environmental Engineering, Kongju National University)
Publication Information
Applied Chemistry for Engineering / v.21, no.1, 2010 , pp. 104-110 More about this Journal
Abstract
Deactivation of SCR catalysts applied in coal, orimulsion, and LNG power plants in Korea were studied for the regeneration of the deactivated catalyst. The catalysts were characterized by XRD, ICP-AES, BET and SEM, and were examined for ammonia SCR. Deactivation of SCR catalyst applied in coal power plant was mainly caused by the blockade of the pore due to the deposition of sulfate and particulate related to the ingredients of the fuel. The surface area of SCR catalyst applied in orimulsion power plant decreased considerably by the accumulation of the compounds of vanadium, sulfur, and magnesium on the surface of the catalyst. The compounds of vanadium and sulfur were related to the ingredients of the fuel, and the compound of magnesium was related to the additive of the fuel. The activity of the deactivated catalyst for ammonia SCR, however, decreased slightly. Despite the long use for more than two-year, deactivation of SCR catalyst applied in LNG power plants hardly occurred.
Keywords
$NH_3-SCR$; $V_2O_5/TiO_2$; deactivation; power plant;
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