Abstract
The catalytic activity for the selective catalytic reduction of NO of carbon supported copper salts was studied in order to develop catalysts, active at temperatures below 473 K. At equal copper to carbon loadings and a space velocity of 60.000 h −1 the activity order was CuO > CuBr 2⋍ CuSO 4 > CuCl 2. The carbon support showed only a low activity. In the lower temperature region (<473 K) CuO was even more active than titania supported vanadium- and vanadium-/tungsten- oxides. The NO-conversion curves of the carbon supported catalysts showed a maximum, which could be explained by both a change in selectivity and in the structure of the catalysts. The CuO/C and the CuBr 2/C exhibited a constant activity at 423 K for 110 h. Above 450 K catalyzed gasification of the carbon support will occur.
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