What does this research mean for the field?

Liquid heat transfer fluids, such as water and thermal oil, provide superior thermal management compared to gaseous fluids in activated-carbon hydrogen storage reactors, significantly reducing adsorption hot spots and increasing usable hydrogen uptake. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To numerically investigate the influence of different liquid and gaseous heat transfer fluids on the thermal behavior and hydrogen storage capacity of an activated-carbon reactor during adsorption and desorption.

August 30, 2026Energy StorageOpen Access

Conjugate Heat and Mass Transfer in Activated‐Carbon Hydrogen Storage Reactors With Liquid and Gaseous Heat‐Transfer Fluids: A Numerical Study

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Authors

ZHZoubida Haddad ACAtef Chibani FRFarhan Lafta Rashid

Discussion

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Overview

Numerical study reveals improved hydrogen uptake with liquid versus gaseous coolants in activated-carbon storage reactors, highlighting optimal heat transfer fluid selection.

Key Points

To numerically investigate the influence of different liquid and gaseous heat transfer fluids on the thermal behavior and hydrogen storage capacity of an activated-carbon reactor during adsorption and desorption.
Developed a transient conjugate numerical model solving coupled mass, momentum, and energy equations in a porous carbon bed, steel vessel wall, and heat transfer fluid (HTF) jacket.
Modeled hydrogen adsorption using the Dubinin–Astakhov isotherm coupled with linear driving force kinetics.
Simulated four HTFs (water, thermal oil, air, and helium) during adsorption, and evaluated oil, nitrogen, air, and helium during desorption under identical geometries.
At t = 400 s during adsorption, water achieved the lowest peak bed temperature (376.5 K) and highest uptake (22.5 mmol g⁻¹), whereas air yielded the lowest uptake (19.0 mmol g⁻¹) and high peak temperatures (395–397 K).
Liquid HTFs improved usable hydrogen storage capacity relative to the air-cooled baseline, increasing uptake by 18.4% with water and 10.5% with thermal oil.
During desorption at t = 4400 s, thermal oil transferred heat into the bed most effectively, whereas gaseous fluids promoted cold-core formation due to their lower sensible heat capacities.

Cite This Study

Haddad et al. (2026) studied this question.

synapsesocial.com/papers/6a93f14b6c1a8fb52e79e20e https://doi.org/10.1002/est2.70504

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August 30, 2026Energy StorageOpen Access

Conjugate Heat and Mass Transfer in Activated‐Carbon Hydrogen Storage Reactors With Liquid and Gaseous Heat‐Transfer Fluids: A Numerical Study

View Full Paper

Ask AI

Bookmark

Authors

ZHZoubida Haddad ACAtef Chibani FRFarhan Lafta Rashid

Discussion

Member takes

Overview

Numerical study reveals improved hydrogen uptake with liquid versus gaseous coolants in activated-carbon storage reactors, highlighting optimal heat transfer fluid selection.

Key Points

To numerically investigate the influence of different liquid and gaseous heat transfer fluids on the thermal behavior and hydrogen storage capacity of an activated-carbon reactor during adsorption and desorption.
Developed a transient conjugate numerical model solving coupled mass, momentum, and energy equations in a porous carbon bed, steel vessel wall, and heat transfer fluid (HTF) jacket.
Modeled hydrogen adsorption using the Dubinin–Astakhov isotherm coupled with linear driving force kinetics.
Simulated four HTFs (water, thermal oil, air, and helium) during adsorption, and evaluated oil, nitrogen, air, and helium during desorption under identical geometries.
At t = 400 s during adsorption, water achieved the lowest peak bed temperature (376.5 K) and highest uptake (22.5 mmol g⁻¹), whereas air yielded the lowest uptake (19.0 mmol g⁻¹) and high peak temperatures (395–397 K).
Liquid HTFs improved usable hydrogen storage capacity relative to the air-cooled baseline, increasing uptake by 18.4% with water and 10.5% with thermal oil.
During desorption at t = 4400 s, thermal oil transferred heat into the bed most effectively, whereas gaseous fluids promoted cold-core formation due to their lower sensible heat capacities.

Cite This Study

Haddad et al. (2026) studied this question.

synapsesocial.com/papers/6a93f14b6c1a8fb52e79e20e https://doi.org/10.1002/est2.70504

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