On the recovery process for waste hydrogen emissions from hydrogenation units
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In our company, the hydrogen gas emitted from the hydrogenation unit is used directly as fuel gas for boilers, resulting in significant waste of resources. We are considering using the PSA process to purify the hydrogen gas, but the organic hydrocarbons present in this emitted gas cannot be effectively recovered. If deep cryogenic separation is used to recover these organic hydrocarbons, dehydration and drying processes are required, as well as refrigeration compressors to provide the necessary cooling – all of which incur high costs in terms of investment and operation. Do anyone have any better suggestions?
Desulfurization and dehydration are carried out together with low-pressure gas; after removing the heavier components, it proceeds to PSA
Do you mean to use membrane separation after some preprocessing?
What he meant is that the waste hydrogen and cold light hydrocarbons should first be subjected to liquid desulfurization, and then purified using PSA
Here, it is sent for catalytic dehydrogenation and desulfurization before being sent to PSA
What is catalytic dehydrogenation as a process?
Are there any membrane separation devices for desulfurization in advanced desulfurization towers? The gas is first sent for membrane separation and purification, and then the waste gas is burned
There is successful experience in introducing exhaust gases into membrane separation systems, with a recovery efficiency of up to 80%. The cost is around 300 Taiwanese dollars
The hydrogen after desulfurization is sent to the PSA unit; the separated gas undergoes membrane separation, while the pure hydrogen is sent back to the PSA unit for further purification. The waste gas enters the fuel gas pipeline system