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http://dx.doi.org/10.4491/KSEE.2012.34.10.664

A Study on the In situ Regeneration Effects of Commercial Deactivated SCR Catalyst  

Park, Hea-Kyung (Research Institute of Catalyst Technology, Hanseo University)
Jun, Min-Kee (Research Institute of Catalyst Technology, Hanseo University)
Kim, Moon-Chan (Department of Environmental Engineering, Cheongju University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.34, no.10, 2012 , pp. 664-670 More about this Journal
Abstract
A study on the in situ regeneration effect of commercial deactivated SCR catalyst which had been exposed to the off gas from the heavy oil fired power plant for a long time was carried out in a simulated in situ conditions by washing with distilled water and various acid solutions in a short time. The catalytic performance test of the regenerated SCR catalysts was carried out in the micro reactor with simulated off gas of the heavy oil fired power plant and all prepared catalysts were characterized by BET, Porosimeter, EDX (Energy Dispersive X-ray spectrometer) and ICP (Inductively Coupled Plasma) to investigate correlations between catalytic activity and surface characteristics of them. The characterization results of the regenerated catalysts showed that the specific surface area was restored 95% more than that of fresh catalyst. Under this study, the activity of the regenerated catalysts with acid solution (3~6 M) without using ultrasonic wave in a simulated in situ conditions was restored 90% more than that of the fresh catalyst. It was found that improved activity of regenerated catalyst was caused by removing the deactivating materials from the surface of the deactivated SCR catalyst through acid washing.
Keywords
Catalyst Regeneration; SCR Catalyst; $NO_x$; Acid Solution;
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