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

Yan Chen, Hyungwoong Ahn*

*Corresponding author for this work

Research output: Contribution to conferenceOtherpeer-review

Abstract / Description of output

A methane reforming-based hydrogen has a distinctive advantage over green hydrogen in that it is dispatchable when needed under any climate conditions. Accordingly, the conventional hydrogen is expected to play a key role in the future hydrogen supply chain, even after green hydrogen processes are widely deployed. However, the fossil fuel-based hydrogen production process must be decarbonised so that it can also contribute to achieving the net zero emission target.
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 [1].
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 [2].
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.
Original languageEnglish
Publication statusPublished - 17 Nov 2022
Event2022 AIChE Annual Meeting - Phoenix Convention Center, Phoenix, United States
Duration: 13 Nov 202218 Nov 2022
https://www.aiche.org/conferences/aiche-annual-meeting/2022

Conference

Conference2022 AIChE Annual Meeting
Country/TerritoryUnited States
CityPhoenix
Period13/11/2218/11/22
Internet address

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