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To confirm the hydrothermal stability of CuZSM5 for urea selective catalytic reduction (SCR), NO removal activity over a series of the catalyst containing various amounts of copper, ranging from 1 to 5 wt%, was examined before and after hydrothermal treatment under a simulated feed gas stream containing 10% water at a temperature range of 600–800 °C. The degree of catalyst aging varies with respect...
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