Abstract:To reveal the role of SO 3 poisoning in Cu/SSZ-13 NH 3 -SCR catalysts, fresh and sulfated Cu/SSZ-13 catalysts were prepared in the presence or absence of SO 3 flux. The deactivation mechanism is probed by the changes of structural, copper species, and selective catalytic reduction (SCR) activity. The variations concentrate on the changes of copper species as the Chabazite (CHA) framework of Cu/SSZ-13 catalysts could keep intact at high ratios of SO 3 /SO x . The thermal gravimetric analyzer (TGA) results revea… Show more
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