资源环境科技发展态势分析平台

Hydrogen is a clean fuel which can potentially revolutionize the energy supply chain and decarbonise fuel consumption. However, a key hurdle which 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 0.6 mol H₂/kg of coal at 14.3 MPa, and adsorption capacity initially increased strongly with pressure (up to ∼4 MPa) and then plateaued out, while temperature only had a very minor influence. This work provides fundamental data for hydrogen storage in coal seams, and thus aids in the industrial implementation of a hydrogen supply chain.

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