A Catalyst For Synthesis Gas Conversion To Hydrocarbons And A Method To Produce Hydrocarbons
A catalyst and process for converting synthesis gas composed of hydrogen and carbon monoxide to hydrocarbons. The catalyst includes cobalt in catalytically active amounts up to about 60 wt% of the catalyst and rhenium in catalystically active amounts of about 0.5 to 50 wt% of the cobalt content of the catalyst supported on alumina. A metal oxide promoter may be added. A preferred process includes the step of contact the synthesis gas feed with the catalyst at reaction conditions.
A catalyst is suggested for the conversion of synthesis gas to hydrocarbons, that contains cobalt and a promoter supported on alumina. In order to improve the catalyst activity and selectivity towards higher hydrocarbons rhenium is added as the promoter. The catalyst composition is as follows (wt.%):
The rhenium content in the catalyst amounts to 1-30% of the cobalt content.
The catalyst contains also an alkali metal oxide in the amount of 0.5-50% (by the alkali metal) of the cobalt content.
Hydrocarbons are produced by passing a gas mixture containing hydrogen and carbon monoxide over the said catalyst at 190-280°C and 1-40 atmospheres. Synthesis gas space velocity is equal to 100-1000 cm3/gcat-hr, hydrogen to carbon monoxide molar ratio is (1-2.5):1. A catalyst is also applied doped with 0.1-5.0 wt.% of a metal oxide selected from a group of zirconium oxide and rare earth metal oxides. The synthesis is carried out also at hydrogen to carbon monoxide molar ratio of (1.5-2.5):1. The process is run in a slurry reactor.