Abstract
Selective catalytic reduction (SCR) of NO x with NH3 is an effective technique to remove NO x from stationary sources, such as coal-fired power plant and industrial boilers. Some of elements in the fly ash deactivate the catalyst due to strong chemisorptions on the active sites. The poisons may act by simply blocking active sites or alter the adsorption behaviors of reactants and products by an electronic interaction. This review is mainly focused on the chemical poisoning on V2O5-based catalysts, environmental-benign catalysts and low temperature catalysts. Several common poisons including alkali/alkaline earth metals, SO2 and heavy metals etc. are referred and their poisoning mechanisms on catalysts are discussed. The regeneration methods of poisoned catalysts and the development of poison-resistance catalysts are also compared and analyzed. Finally, future research directions in developing poisoning resistance catalysts and facile efficient regeneration methods for SCR catalysts are proposed.
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Li, J., Peng, Y., Chang, H. et al. Chemical poison and regeneration of SCR catalysts for NO x removal from stationary sources. Front. Environ. Sci. Eng. 10, 413–427 (2016). https://doi.org/10.1007/s11783-016-0832-3
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DOI: https://doi.org/10.1007/s11783-016-0832-3