Forming light hydrocarbons

A process for producing a liquid product stream that has a C13 to C20 hydrocarbon content of less than 5.0 wt % based upon a total weight of the liquid product stream, the process comprising:

• contacting synthesis gas with a sulfurized Zeolite Socony Mobil-5 catalyst, wherein the sulfurized Zeolite Socony Mobil-5 catalyst includes cobalt and a sulfur doped Zeolite Socony Mobil-5 support, with the sulfur being incorporated via sulfate ions, the cobalt being present in an amount within a range of from 1 to 25 wt % based upon a dry weight of the sulfurized Zeolite Socony Mobil-5 catalyst, the sulfur being present in an amount within a range of from 0.01 to 1.00 w t%, based upon a dry weight of the sulfurized Zeolite Socony Mobil-5 catalyst, the conditions consisting essentially of a temperature within a range of from 150 to 300° C., a pressure within a range of from 5 to 40 bar, and a gas hourly space velocity within a range of from 100 to 10000 h−1.