Reliable Hydrogen PSA Unit , Hydrogen Production Unit Decarbonization By PSA

The features, process principle and process flow of PSA decarburization technology are the same as those of PSA purification of hydrogen.

The distinction is that the feed gas to the PSA is a mix rich in CO2, and the outcome gas can be H2, N2, and CO.

Features

• Mature and stable generation technology

• Smooth processes, efficient operation, and quick action for startup & shutdown

• High level of automation, simple and safe operation and control steady, secure and reliable

• Can recover less land occupation and investment in a short time

• Cost-effective operation and production

• Recover CO2 at >90% high concentration

Process Principle

Decarburization separates carbon dioxide from other gaseous parts by using the properties of the adsorbents, which are selected to adsorb carbon dioxide in the gas blend under pressurized conditions.

In the meantime, the adsorbents release the adsorbed CO2 under decreased pressure to refresh the adsorbents. According to the customers' diverse requirements for the carbon dioxide content of the product, a one-stage or two-stage operation is adopted to ensure the production of the active ingredient and the stability index.

Process Description

The CO2-rich feed gas is pretreated and then enters the pressure swing adsorption system from the bottom of the adsorption tower. Purging gases (H2, N2, CO) are obtained from the top of the column. We obtain the desorbed gas (mainly CO2) from the bottom of the column in order to recover CO2 or release it into the atmosphere.

Performance

• Capacity: 5,000～100,000 Nm³/h

• Remaining CO2 : ≤ 0.2%(v/v)

• Pressure : 0.3～3.6MPa(G)

• Hydrogen Recovery: ≥98%(v/v)

• Nitrogen recovery: ≥90%(v/v)

• CO recovery: ≥92%(v/v)

Application

• CO2 removal and purification from water gas and semi water gas

• CO2 removal and purification from shift gas

• CO2 removal and purification from pyrolysis gas of methanol cracking

• CO2 removal or concentration from other sources of CO2 –rich gases