(677b) Feasibility Study of Pressure Swing Adsorption (PSA) Processes for CO2 Capture and H2 Purification in Blue Hydrogen Processes and Hydrogen Deblending in the Gas Network
AIChE Annual Meeting
Thursday, November 17, 2022 - 3:55pm to 4:20pm
An adsorption process has been actively studied for CO2 capture mainly from two locations of the H2 production process: One is the synthesis gas generated by reforming of methane or light hydrocarbon or gasification of biomass, coals or heavy hydrocarbons, and the other is the H2 PSA tail gas of a hydrogen production process following. It is still uncertain which feed stream would be more advantageous for CO2 capture. In this study, a feasibility study was carried out to answer this question .
The second part of this study is to redesign the H2 purification PSA for producing a high-purity H2 from the CO2-depleted synthesis gas downstream of a CO2 capture unit applied to the synthesis gas and to estimate the H2 PSA performance .
It is imperative to find a way to supply both hydrogen and methane at the same time to meet the demands of household and industry for both fuel gases during the transition period. To this end, it is likely that hydrogen is blended with methane and the gas mixture is transported through the existing gas network. The gas mixture must be separated into each of two gases near the final stage of the gas distribution network. A PSA process designed for separation of hydrogen from methane was evaluated at various mixing ratios of the two gases.
1. Chen and Ahn, Feasiblity Study of Vacuum Pressure Swing Adsorption for CO2 Capture from an SMR Hydrogen Plant: Comparison between Synthesis Gas Capture and Tail Gas Capture, Frontiers in Chemical Engineering 3, 742963, 2021.
2. Luberti et al., Design of a H2 PSA for Cogeneration of Ultrapure Hydrogen and Power at an Advanced Integrated Gasification Combined Cycle with Pre-combustion Capture, Adsorption 20(2-3), 511-524, 2014.