Synthesis gas stream consisting of 65.80% H2, 33.80% CO, and 0.400% CH4 (by mole) is fed into the process described below at a rate of 100 mol/hour. The effluent stream from the reactor is fed into a separator where the methanol is completely removed, and the unconverted reactants are recycled to the reactor. To avoid the buildup of methane, a portion of the recycled stream is purged. At present operating conditions, the CO conversion over the entire process is 92.00%, and the methane mole fraction at the reactor inlet (Stream 2) is 2.870%.