The plant operates in two lines, each of which is fed with methane gas. This unit is designed to convert methane (CH4) gas into synthesis gas (CO + H2). Synthesis gas also contains N2, CO2, Ar, CH4, N2O and a small amount of NH3 and HCN gases. The resulting synthesis gas is the main feedstock for the Fischer-Tropsch reactor.

The heated methane saturated gas with hydrogen and dimethyl disulfide is introduced into the hydrotreating reactor. Then, in the chemisorber, with the help of catalysts based on zinc oxide, the gas content is purified from sulfur. After purification, the heated gas mixture with steam is introduced into a pre-reforming reactor where heavy hydrocarbons are reformed with steam and catalyst. The pre-reformed gas released from the reactor is mixed with HRG (external recirculation gas) rich in CO and CO2. The gas mixture is fed to the mixing zone of the main autothermal reforming reactor, where oxygen and hot steam are added. Oxygen is supplied from the Oxygen, Nitrogen and Air Plant. In the reactor there are reactions of conversion of methane with oxygen and reaction of conversion of water vapour. Sintez­gaz is cooled in water coolers, separated in the separator and sent to the reactor Fishera­Tropsha at the synthetic liquid production unit.