LOW-TEMPERATURE OXIDATION OF CO OVER SUPPORTED PDCL2-CUCL2 CATALYSTS

PdCl2-CuCl2 catalyst supported on activated carbon was examined for th e low temperature oxidation of CO. The catalyst developed in the prese nt study was active and stable at ambient conditions if water were exi sting in the feed gas stream. The addition of Cu(NO3)(2) into the PdCl 2-CuCl2 catalyst significantly enhanced the CO oxidation activity. X-r ay diffraction study revealed that the role of Cu(NO3)(2) was to stabi lize active Cu(II) species, Cu2Cl(OH)(3), on the catalyst surface whic h maintains the redox property of palladium. When HCl and SO2 were als o existing in the feed, they easily inactivated the catalyst. It was f ound that HCl and SO2 inhibited the formation of active Cu(II) species on the catalyst surface.