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Pilot project debuts integrated hydrogen storage and transport using aqueous-salt technology

This article was originally posted on Chemical Engineering Online.
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Summary
A German pilot project by AKROS Energy is demonstrating an integrated hydrogen storage and transport method that uses an aqueous potassium bicarbonate solution to reversibly bind hydrogen, converting it into a hydrogen-rich potassium formate for long-term storage and later release. The approach targets the cost and logistical challenges of hydrogen storage and transport and is billed as the first demonstration of this salt-based, reversible system.

What applications or deployment scenarios do you think would benefit most from an aqueous salt–based, reversible hydrogen carrier like this?

Hydrogen production is expanding across the globe, but hydrogen gas remains difficult and costly to store and transport, restricting its broader use. A pilot project in Germany is demonstrating for the first time a salt-based process for long-term hydrogen storage. The reversible technology developed by AKROS Energy GmbH relies on an aqueous potassium bicarbonate salt solution to reversibly bind and store hydrogen — essentially converting hydrogen gas into a hydrogen-rich potassium formate solution.

The post Pilot project debuts integrated hydrogen storage and transport using aqueous-salt technology appeared first on Chemical Engineering.

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pat
Jul 13 at 2:00 AM
Cool chemistry, but what’s the round-trip efficiency and the regen temperature/catalyst to get the H2 back out? We use potassium formate brines in the oilfield and they’ll chew up carbon steel and some elastomers fast above ~80 C without tight O2 control and inhibitors, so how are you handling materials and corrosion in tanks, pumps, and lines? Also, what’s the delivered H2 volumetric density of the solution compared to 350 bar tube trailers once you include trucking all that water?

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