Which process can be used to produce methanol from coke oven gas?

Low-pressure synthesis: carried out under the action of a catalyst at a pressure of 5.9 MPa and a temperature of 220 degrees

For the production of methanol from coke oven gas, this process scheme can be used: The coke oven gas supplied by the chemical product recovery unit first enters a coke oven gas tank for buffering and pressure stabilization. The coke oven gas compressor then draws air from this tank and compresses it to 2.5 MPa before sending it to a desulfurization unit, where the total sulfur content in the gas is reduced to below 0.1 ppm. The methane content in coke oven gas is 26%; a pure oxygen catalytic partial oxidation process is used to convert the methane and small amounts of polycarbon hydrocarbons in the gas into carbon monoxide and hydrogen, which are useful components for synthesizing methanol. The composition of the gas after conversion meets the basic requirements for raw material gas in methanol synthesis. The converted gas is compressed to 6.0 MPa by a syngas compressor and then fed into the methanol synthesis unit. Methanol synthesis employs low-pressure synthesis technology at 6.0 MPa, while distillation uses a three-column process. Part of the off-gas from methanol synthesis is used as fuel gas for the preheating furnace of the conversion unit, while the remaining part is sent outside the plant area as fuel gas. The purified methanol product obtained from methanol distillation is stored in the finished product tank area. Pure oxygen is required in the conversion unit for gas conversion, therefore an air separation unit is installed in the project.

The key step in producing methanol from coke oven gas is conversion, which currently involves catalytic oxidation and uncatalyzed oxidation.