Abstract
The selective catalytic reduction (SCR) of NOx by urea as a reducing agent was carried out over fresh and sulfated CuO/γ-Al2O3 catalysts in a fluidized-bed reactor. The optimum temperature ranges for NO reduction on the fresh and sulfated CuO/γ-Al2O3 catalysts were 300-350 ◦ C and 400-450 ◦ C, respectively. NO reduction with the sulfated CuO/γ-Al2O3 catalyst was somewhat higher than that with the fresh CuO/γ-Al2O3 catalyst. N2O formation increased with increasing reaction temperature. Ammonia (NH3) slip increased with increasing gas velocity and decreased with increasing reaction temperature. 2003 Society of Chemical Industry
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