Hydrocarbon ratio after hydrogen recovery in methanol synthesis
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[Question] In methanol synthesis, is the hydrogen recovered from the membrane mixed with fresh gas before being fed together into the compression stage for compression? If so, does the hydrocarbon ratio of 2.05~2.15 refer to the hydrocarbon ratio of the gas after mixing?
Could the senior explain it in more detail? Thank you! !
There are surely users for the hydrogen gas at the outlet of the membrane separator – it can be used back or sent to ammonia synthesis, while any slow-flowing gas is vented
You are correct; a hydrogen-to-carbon ratio of 205–2.15 is the control value for the fresh gas fed into the synthesis cycle system. Since carbon is added before the conversion furnace, the hydrogen-to-carbon ratio of the conversion gas is adjusted through three methods: operation of the conversion furnace itself, addition of carbon, and addition of hydrogen.