Discussion on the purification and stripping hydrogen process for this stock
Thread Content
The main components of the purified gas at the low-methane outlet are H2: 87.58% v, CH4: 10.23% v, CO: 1.84% v. Is it reasonable to use two stages of PSA for hydrogen extraction in the process in order to achieve a hydrogen recovery rate of over 98%? Compare the advantages and disadvantages of a process route involving PSA followed by cryogenic separation, or those of a direct cryogenic + PSA process?
Hello, what are the pressure and flow rates? What purity level is required for the hydrogen?
A combination of PSA and cryogenic separation would be better: 1. PSA separation yields hydrogen gas of satisfactory quality; 2. Cryogenic separation allows for the recovery of CO from the gas produced by PSA, while the hydrogen-rich gas obtained through cryogenic separation can be pressurized and sent back to the PSA unit
This will make good use of the feed gas, achieving a very high recovery rate. But it will increase some rotating equipment