Catalyst useful in fisher-tropsch synthesis

A process for producing a product stream comprising:

• contacting the catalyst composition with a syngas mixture to produce a mixture of aliphatic and aromatic hydrocarbons;
• wherein the product stream is produced by Fischer-Tropsch synthesis performed at a reaction temperature of about 150-350° C., a space velocity of about 400-5000 h−1 and a pressure of between atmospheric and about 5 MPa;
• wherein the syngas mixture has a hydrogen (H2) to carbon monoxide (CO) molar ratio of about 1-4;
• and
• wherein the catalyst composition comprises
• cobalt;
• manganese;
• and at least one element selected from the group of lanthanum and phosphorus,
• wherein the relative molar ratios of the elements comprised in the composition are represented by the formula
• CoMnaLabPcMdOx
• wherein:
• M is one or more elements selected from the group consisting of alkali metal, alkaline earth metal and transition metal;
• a is about 0.8-1.2;
• b and/or c is greater than 0 to about 0.005;
• d is 0 to about 0.005;
• and
• x is a number determined by the valence requirements of the other elements present.