Catalyst support materials and catalyst materials useful for Fischer-Tropsch processes

A catalyst material comprising a catalyst support material and one or more catalytic metals disposed on the catalyst support material, the one or more catalytic metals including cobalt, the catalyst support material comprising in the range of about 75 wt% to about 96 wt% gamma-alumina, calculated as Al2O3 on an oxide basis, in the range of about 1 wt% to about 20 wt% silicon oxide, calculated as SiO2 on an oxide basis and in the range of about 1 wt% to about 20 wt% titanium dioxide, calculated as TiO2 on an oxide basis, wherein

• the silicon oxide and gamma-alumina are provided as a substantially non-homogeneous mixture in which the silicon oxide is not homogeneously mixed throughout the gamma-alumina and in which
• the gamma-alumina is substantially enveloped by the silicon oxide;
• or
• the silicon oxide is dispersed in the gamma-alumina as a dispersed silicon oxide phase, as a dispersed phase of a silicon aluminate, or as a combination thereof,
• the gamma-alumina and the silicon oxide are substantially coated by the titanium dioxide, and
• at least about 90 wt% of the catalyst support is gamma-alumina, silicon oxide and titanium dioxide.