The catalytic synthesis of hydrocarbons from H2/CO mixtures over the Group VIII metals V. The catalytic behavior of silica-supported metals

The catalytic behavior of silica-supported Group VIII metals in the COH2 synthesis reaction has been determined and compared to that of alumina-supported metals. A wider range of specific activities is observed over the silicasupported metals when based upon either adsorbed CO or adsorbed hydrogen to determine metal surface sites. Inclusion of a CuSiO2 catalyst has established the left-hand portion of the volcano plot that was predicted from an earlier study. The most recent values for CO heats of adsorption on these metal surfaces were utilized to obtain this volcano plot and verify the correlation between activity and ΔH(ad) observed earlier with alumina-supported metals.