Sulfur content in methanol produced from coke oven gas
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For the production of methanol from coke oven gas, the sulfur content in the gas is required to be less than 50 mg/m³. What are the requirements in other plants?
May I ask if it is the sulfur content after refined desulfurization or before it? Is it the hydrogen sulfide content or the organic sulfur content?
The sulfur content is too high; your nail synthesis catalyst will become ineffective in just a few days. The total sulfur content in methanol synthesis gas is required to be less than 0.1 ppmm; it is ideal to have no sulfur at all. That’s not realistic. Anyway, the lower, the better.
The production of methanol from coke oven gas requires that the sulfur content in the gas be below 0.1PPM, as catalysts are used in the methanol synthesis process; a sulfur content higher than this value will poison the catalysts, rendering them ineffective and preventing the completion of methanol synthesis.
Sulfur content requirement of 0.1PPM level
Of course, it’s the total sulfur content. Generally, organic sulfur is converted to inorganic sulfur before removal, and the required sulfur content is 0.1 ppm
Is the poster referring to the sulfur content in the gas entering the methanol zone? In addition to hydrogen sulfide, the organic sulfur content also needs to be considered.
The production of methanol from coke oven gas requires that the total sulfur content in the conversion gas be below 0.1PPM. Sulfur compounds in the feed gas (H2S, CS2, COS) can react with copper in copper-based catalysts to form CuS and Cu2S, thereby poisoning the catalyst and rendering it inactive. The rate of decline in catalyst activity is proportional to the poisoning time on a logarithmic scale.
Is the sulfur content mentioned by the poster the total sulfur content in the syngas before desulfurization of the syngas? After desulfurization, the sulfur content in the raw gas used for methanol production is at the level of 0.1–0.2 PPM.
It should be the total sulfur content, which should be below 0.1 ppm after thorough desulfurization.
The production of methanol from coke oven gas requires that the total sulfur content at the outlet of the precision desulfurization system be below 0.1PPM. Both organic sulfur and inorganic sulfur in the feed gas can poison the conversion catalyst and the synthesis catalyst, affecting the crystal structure of the active components and thereby causing the catalyst to lose its activity.