Supported metal oxides for catalytic combustion of CO and VOCs emissions: preparation of titania overlayers on a Macroporous support

摘要

ToO_2 (anatase), SiO_2 and γ-Al_2O_3 were used as supports for Co-, Cu-, Fe- and Mn-oxide with a loading of active phase corresponding to one theoretical layer. The catalysts were tested for the combustion of CO and toluene, and the best combinations with active phase and support were submitted to a deactivation test in a waste gas incinerator for 50 days. The catalyst screening showed that CuO_x/TiO_2 was the most promising system. To design a catalyst with good activity and transport properties, a macroporous substrate was coated with TiO_2 for use as a support of Cu-oxide.