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Hydrogen deblending

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Technology Description

Hydrogen deblending extracts pure hydrogen for dedicated uses as well as reasonably hydrogen-free natural gas from blended hydrogen and natural gas streams. Deblending allows for the extraction of pure hydrogen for dedicated uses (e.g. hydrogen fuel cells, feedstock) as well as reasonably hydrogen-free natural gas for gas quality-sensitive consumers (e.g. some industrial applications, feedstock, compressed natural gas refuelling stations). Deblending involves the separation of hydrogen from the methane-rich gas stream through different technologies or combinations among them, including gas permeation (e.g. polymer membrane, palladium membrane, carbon membrane, metal membranes, glass/ceramic membranes), pressure swing adsorption (PSA or membrane-PSA) or cryogenic separation, with different degrees of selectivity and efficiency. Although gas separation technologies have been used in the industry for decades, the technology has not yet been used on a large scale, such as in a distribution network.

Relevance for Net Zero

If hydrogen blending is used as a method to transport hydrogen, deblending will be needed to ensure that end users that require the use of pure hydrogen can access the hydrogen blended in the gas grid.

Key Countries

United Kingdom, Germany

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