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Water tolerance of DeNOx SCR catalysts using hydrocarbons: Findings, improvements and challenges

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Abstract

The recent developments on the effect of H2O on deNOx performance of a variety of SCR catalysts selectively removing NOx by hydrocarbons in excess oxygen have been reviewed. In particular, the water tolerance of the catalyst is summarized to illustrate a common deactivation behavior of SCR catalyst for the reduction of NO by hydrocarbons under wet feed gas mixture. Earlier proposals elucidating the possible cause of the catalyst deactivation under wet conditions are discussed, focusing mainly on the catalyst characteristics. A promising way, which can improve the water tolerance and the hydrothermal stability of zeolite-based SCR catalyst, is also described.

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  1. Department of Environmental Engineering, Taegu University, 15 Naeri, Jinryang, 712-714, Kyungsan, Rep. of Korea

    Moon Hyeon Kim & In-Sik Nam

  2. Department of Chemical Engineering/School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), P.O. Box 125, 790-600, Pohang, Rep. of Korea

    In-Sik Nam

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Kim, M.H., Nam, IS. Water tolerance of DeNOx SCR catalysts using hydrocarbons: Findings, improvements and challenges. Korean J. Chem. Eng. 18, 725–740 (2001). https://doi.org/10.1007/BF02706393

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