Synthetic natural gas (SNG) is mostly methane with a small amount of hydrogen. It is produced by reacting syngas over a nickel catalyst in a methanation reactor. The carbon monoxide and hydrogen in the syngas react to form methane and water vapor. The water is condensed and removed from the gas prior to compression for delivery to the market via a pipeline.
Dakota Gas can produce upwards of 170 million standard cubic feet per day (mmscf/d) of synthetic natural gas, which has a heating value of about 975 Btu/SCF.