Integration of H2 storage in a two sub-systems electrolyzer and methanation helps to achieve an independent operation of methanation unit to continuously produce synthetic methane . A potential reduction of methane production costs could also be achieved by integrating a hydrogen storage facility in the system. Methanation unit can run on FLH such as 8500h when an intermediate hydrogen storage is integrated and be able to supply sufficent hydrogen. This way running hours of electrolyzer is reduced and hence less electricity is purchased.
The question is how to find out and estimate the appropriate size of hydrogen storage ?
More details are required to properly answer this question. But 30 to 90 days of production may be enough.
Use Paladium and google this please
How much Hydrogen absorbs Paladium
:)
Dear Samim Ghafoori ,
Which CO2 source is used for methanation? How high is the CO2 volume flow?
Using the numerical value from the CO2 volumetric flow, then using Sabatier reaction calculate the required H2 volumetric flow. And from there, keep calculating backwards until the electrolysis dimension comes out.
The main aspect of designing any storage is a clear analysis of the operation conditions on the supply and demand side. We made a first investigation of the German grid conditions and their influence on storage capacity demand here:
Preprint Renewable storage evaluation and grid resilience
Process efficiency is also a real cost influence and a separate operation of electrolysis and methanation doesn't allow heat recovery if you not include heat storage; you can find an analysis and some process design options here:
Preprint Power to Gas, Chances, Challenges, and Options-1
Preprint Power-to-Gas, Chances, Challenges, and Engineering Options
I hope that this is helpful for your work good success
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