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The Effect of Gas Solubility on the Selection of Cushion Gas for Underground Hydrogen Storage in Aquifers by Ismaeil Izadi Amiri; Davood Zivar; Shahab Ayatollahi; Hassan Mahani is a Engineering article available to read on EtoBox.

What is The Effect of Gas Solubility on the Selection of Cushion Gas for Underground Hydrogen Storage in Aquifers about?

Underground hydrogen storage (UHS) is gaining worldwide attention as an efficient solution for energy supplydemand imbalance. However, deploying UHS at full scale encounters several challenges. One of the primary challenges is selecting a suitable cushion gas to optimize hydrogen storage and withdrawal efficiency. In the existing literature cushion gas dissolution in the resident reservoir fluid is not considered as one of the technical selection criteria and we aim to show in this paper that it is critically important as it affects hydrogen recovery, pressure maintenance and hydrogen purity. With a focus on hydrogen storage in aquifers, we investigated cushion gas solubility in water. Three potential cushion gases-carbon dioxide, methane, and nitrogen-were assessed through large-scale compositional simulations using a conceptual aquifer model, considering temperature and pressure conditions corresponding to the reservoir depth. Gas solubility analysis involved examining changes in reservoir pressure, water production, injected cushion gas volume, and gas saturation changes during the cyclic process. Two distinct scenarios, with and without gas solubility, were considered to unders

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Author

Ismaeil Izadi Amiri; Davood Zivar; Shahab Ayatollahi; Hassan Mahani

Publisher

Elsevier BV

Published

2024

Language

EN

Field

Engineering (Physical Sciences)