Fischer-tropsch processes and catalysts with promoters

A process for producing hydrocarbons, comprising contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising C5 and higher hydrocarbons;

• said catalyst comprising:
• cobalt;
• rhenium;
• a promoter selected from the group consisting of boron and phosphorous, wherein the promoter is effective to enhance the selectivity of the catalyst for producing the C5 and higher hydrocarbons, wherein the weight ratio of elemental promoter to elemental cobalt is between about 0.0005:1 and 0.5:1;
• and
• an alumina support.

A process for producing hydrocarbons, comprising contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising C5 and higher hydrocarbons;

• said catalyst comprising:
• cobalt;
• a promoter selected from the group consisting of boron and phosphorus, wherein the weight ratio of elemental promoter to elemental cobalt is between about 0.0005:1 and 0.5:1;
• and
• a support selected from the group consisting of silica, titania, zirconia, alumina, and combinations thereof;
• wherein the catalyst is selective to the C5 and higher hydrocarbons such that under the conversion-promoting conditions a is at least about 0.90.