Optimizing Underground Hydrogen Storage in Aquifers:: The Impact of Cushion Gas Type

Motaz Saeed; Prashant Jadhawar

doi:10.1016/j.ijhydene.2023.08.352

Optimizing Underground Hydrogen Storage in Aquifers: The Impact of Cushion Gas Type

Motaz Saeed, Prashant Jadhawar^* (Corresponding Author)

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

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Abstract

This study investigated the impact of cushion gas type and presence on the performance of underground hydrogen storage (UHS) in an offshore North Sea aquifer. Using numerical simulation, the relationship between cushion gas type and UHS performance was comprehensively evaluated, providing valuable insights for designing an efficient UHS project delivery.
Results indicated that cushion gas type can significantly impact the process’s recovery efficiency and hydrogen purity. CO2 was found to have the highest storage capacity, while lighter gases like N2 and CH4 exhibited better recovery efficiency. Utilising CH4 as a cushion gas can lead to a higher recovery efficiency of 80%. It was also determined that utilising either of these cushion gases was always more beneficial than hydrogen storage alone, leading to an incremental hydrogen recovery up to 7%. Additionally, hydrogen purity degraded as each cycle progressed, but improved over time. This study contributes to a better understanding of factors affecting UHS performance and can inform the selection of cushion gas type and optimal operational strategies.

Original language	English
Pages (from-to)	1537-1549
Number of pages	13
Journal	International Journal of Hydrogen Energy
Volume	52
Issue number	Part A
Early online date	13 Sept 2023
DOIs	https://doi.org/10.1016/j.ijhydene.2023.08.352
Publication status	Published - 2 Jan 2024

Bibliographical note

The authors gratefully acknowledge the funding support by the Net Zero Technology Centre, UK to accomplish this work under the Hydrogen Innovation Grant scheme. We also thank valuable support from the Computer Modelling Group (CMG) Limited in this study.

Keywords

Underground Hydrogen Storage
Hydrogen storage
Cushion gas
Renewable energy
Energy Storage

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2023.08.352Licence: CC BY

Saeed_etal_HE_Optimizing_Underground_Hydrogen_VOR
0360-3199/© 2023 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Final published version, 3.93 MBLicence: CC BY

2 Invited talk
1 Conference

Hydrogen Pipeline Transport to Subsurface Storage in Depleted Oil and Gas Reservoirs and Aquifers
Jadhawar, P. (Speaker)
7 Sept 2023
Activity: Disseminating Research › Conference
Geological Storage of Hydrogen and CO2 Sequestration
Jadhawar, P. (Keynote speaker)
5 Oct 2023 → 6 Oct 2023
Activity: Disseminating Research › Invited talk
Energy Transition - The Underground Storage of Hydrogen (Key Note Speaker)
Jadhawar, P. (Keynote speaker)
8 Feb 2023
Activity: Disseminating Research › Invited talk

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Cite this

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title = "Optimizing Underground Hydrogen Storage in Aquifers:: The Impact of Cushion Gas Type",

abstract = "This study investigated the impact of cushion gas type and presence on the performance of underground hydrogen storage (UHS) in an offshore North Sea aquifer. Using numerical simulation, the relationship between cushion gas type and UHS performance was comprehensively evaluated, providing valuable insights for designing an efficient UHS project delivery. Results indicated that cushion gas type can significantly impact the process{\textquoteright}s recovery efficiency and hydrogen purity. CO2 was found to have the highest storage capacity, while lighter gases like N2 and CH4 exhibited better recovery efficiency. Utilising CH4 as a cushion gas can lead to a higher recovery efficiency of 80%. It was also determined that utilising either of these cushion gases was always more beneficial than hydrogen storage alone, leading to an incremental hydrogen recovery up to 7%. Additionally, hydrogen purity degraded as each cycle progressed, but improved over time. This study contributes to a better understanding of factors affecting UHS performance and can inform the selection of cushion gas type and optimal operational strategies.",

keywords = "Underground Hydrogen Storage, Hydrogen storage, Cushion gas, Renewable energy, Energy Storage",

author = "Motaz Saeed and Prashant Jadhawar",

note = "The authors gratefully acknowledge the funding support by the Net Zero Technology Centre, UK to accomplish this work under the Hydrogen Innovation Grant scheme. We also thank valuable support from the Computer Modelling Group (CMG) Limited in this study.",

year = "2024",

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doi = "10.1016/j.ijhydene.2023.08.352",

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T1 - Optimizing Underground Hydrogen Storage in Aquifers:

T2 - The Impact of Cushion Gas Type

AU - Saeed, Motaz

AU - Jadhawar, Prashant

N1 - The authors gratefully acknowledge the funding support by the Net Zero Technology Centre, UK to accomplish this work under the Hydrogen Innovation Grant scheme. We also thank valuable support from the Computer Modelling Group (CMG) Limited in this study.

PY - 2024/1/2

Y1 - 2024/1/2

N2 - This study investigated the impact of cushion gas type and presence on the performance of underground hydrogen storage (UHS) in an offshore North Sea aquifer. Using numerical simulation, the relationship between cushion gas type and UHS performance was comprehensively evaluated, providing valuable insights for designing an efficient UHS project delivery. Results indicated that cushion gas type can significantly impact the process’s recovery efficiency and hydrogen purity. CO2 was found to have the highest storage capacity, while lighter gases like N2 and CH4 exhibited better recovery efficiency. Utilising CH4 as a cushion gas can lead to a higher recovery efficiency of 80%. It was also determined that utilising either of these cushion gases was always more beneficial than hydrogen storage alone, leading to an incremental hydrogen recovery up to 7%. Additionally, hydrogen purity degraded as each cycle progressed, but improved over time. This study contributes to a better understanding of factors affecting UHS performance and can inform the selection of cushion gas type and optimal operational strategies.

AB - This study investigated the impact of cushion gas type and presence on the performance of underground hydrogen storage (UHS) in an offshore North Sea aquifer. Using numerical simulation, the relationship between cushion gas type and UHS performance was comprehensively evaluated, providing valuable insights for designing an efficient UHS project delivery. Results indicated that cushion gas type can significantly impact the process’s recovery efficiency and hydrogen purity. CO2 was found to have the highest storage capacity, while lighter gases like N2 and CH4 exhibited better recovery efficiency. Utilising CH4 as a cushion gas can lead to a higher recovery efficiency of 80%. It was also determined that utilising either of these cushion gases was always more beneficial than hydrogen storage alone, leading to an incremental hydrogen recovery up to 7%. Additionally, hydrogen purity degraded as each cycle progressed, but improved over time. This study contributes to a better understanding of factors affecting UHS performance and can inform the selection of cushion gas type and optimal operational strategies.

KW - Underground Hydrogen Storage

KW - Hydrogen storage

KW - Cushion gas

KW - Renewable energy

KW - Energy Storage

U2 - 10.1016/j.ijhydene.2023.08.352

DO - 10.1016/j.ijhydene.2023.08.352

M3 - Article

SN - 0360-3199

VL - 52

SP - 1537

EP - 1549

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - Part A

ER -

Optimizing Underground Hydrogen Storage in Aquifers: The Impact of Cushion Gas Type

Abstract

Bibliographical note

Keywords

UN SDGs

Access to Document

Fingerprint

Activities

Hydrogen Pipeline Transport to Subsurface Storage in Depleted Oil and Gas Reservoirs and Aquifers

Geological Storage of Hydrogen and CO2 Sequestration

Energy Transition - The Underground Storage of Hydrogen (Key Note Speaker)

Cite this