Abstract: Au-CuO/TiO2 and Au/TiO2 catalysts were prepared by the deposition-precipi tation method. The influence of preparation conditions such as deposition temper ature, deposition pH, calcination temperature, and Cu/Au molar ratio on the cata lytic performance was evaluated. Au-CuO/TiO2 has higher catalytic activity a nd stability than Au/TiO2 in the removal of H2 from CO2-rich gases. The influence of treatment order of reduction and H2S poisoning on the catalytic a ctivity was also studied. The Au-CuO/TiO2 catalyst is more sensitive to t he treatment than the Au/TiO2 catalyst, which shows that an Au-Cu alloy m ay be formed in the Au-CuO/ TiO2 catalyst after reduction.

Key words: gold, copper oxide, titania, hydrogen removal, carbon dioxide