Hydrogen Adsorption on Sub-Bituminous Coal: Implications for Hydrogen Geo-Storage

Hydrogen Adsorption on Sub-Bituminous Coal: Implications for Hydrogen Geo-Storage

Hydrogen storage

Digital storage

Supply chains

Hydrogen fuels

Coal deposits

Gas adsorption

Hydrogen economy

Coal storage

Bituminous coal

Hydrogen is a clean fuel that can potentially revolutionize the energy supply chain and decarbonize fuel consumption. However, a key hurdle that needs to be overcome before a full-scale hydrogen economy can be established is hydrogen storage which is currently the main limitation. Here, we propose that hydrogen gas can be stored in underground coal seams, where it adsorbs on the coal surface. However, currently, no hard data related to such a procedure exists. We, therefore, demonstrate experimentally that significant amounts of hydrogen gas can be stored via this route. Hydrogen adsorption capacities reached 0.6molesH2/kg of coal at 14.3MPa, and adsorption capacity initially increased strongly with pressure (up to 4MPa) and then plateaued out, while temperature only had a very minor influence. This study provides fundamental data for hydrogen storage in coal seams, and thus aids in the industrial implementation of a hydrogen supply chain. 2021. The Authors.

10

48

Geophysical Research Letters

2021

Iglauer, Stefan

Abid, Hussein

Al-Yaseri, Ahmed

Keshavarz, Alireza

journalArticle

948276

10.1029/2021GL092976