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US 2025/0145504 A1Published application
Integrated water treatment for water electrolysis by means of osmotic membrane distillation
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsThomas Schiestel, Tobias Götz, Christopher Hänel, Bentsian Elkin
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Abstract
The present invention relates to processes for electrolysis of water to generate hydrogen by means of osmotic membrane distillation plants, and to osmotic membrane distillation plants designed and suitable for such processes.
Claims15
A process for electrolysis of water to generate hydrogen comprising the following process steps:
- a) providing an electrolyte solution (5) which comprises water and at least 1 mol/l of at least one electrolyte,
- a feed solution comprising water, and
- an osmotic membrane distillation plant which has at least three chambers, in particular a feed chamber (21), a permeate chamber (22) and an electrolysis chamber (11), wherein the feed chamber (21) and the permeate chamber (22) are separated by a porous hydrophobic gas-permeable membrane (27) and the feed chamber (21) has feed solution and the permeate chamber (22) has electrolyte solution (5),
- b) carrying out an osmotic membrane distillation, wherein water evaporates in the feed chamber (21), passes through the membrane (27) as water vapour and condenses into the electrolyte solution in the permeate chamber (22), and
- c) electrolysing water of the electrolyte solution (5) in the electrolysis chamber (11), wherein hydrogen and oxygen are obtained.
2 more elements
Dependencies are inferred from the claim text.