PROTECTIVE Sol-Gel Oxide COATINGS LIMITING HYDROGEN PERMEATION through polymer materials

Nazwa technologii

PROTECTIVE Sol-Gel Oxide COATINGS LIMITING HYDROGEN PERMEATION through polymer materials

Abstrakt (krótki opis oferowanej technologii)

The subject of the invention is a method (know-how, partly confidential) of the production and application of sol-gel coatings on polymeric materials. These can then be used as a part of pressure storage system.

Know-how is the answer to the problem of hydrogen permeation through the vessel/container (polymeric liner), especially at higher pressures (compressed) eg.70MPa (700 bar).

Szczegóły technologiczne i opis oferowanej technologii

The problem: Hydrogen can be stored as compressed gas in the high-pressure (of ~ 70 MPa) tanks. Storing hydrogen in tanks causes a problem of hydrogen permeation through the tank walls, especially in the case of long-term storage.

The max. range of permeation is determined by industry standards, e.g. in the case of power supply systems for passenger cars it is less than 6 Ncm3 per hour of hydrogen per liter internal volume of the container (Commission Regulation EU No 406/2010).

Hydrogen permeation is an important issue both in the individual (passenger cars) and the industrial applications (hydrogen transport, storage, energy conversion), especially from the safety point of view, because of the high explosiveness of the air-hydrogen mixture.

The solution to the problem: The know-how concerns the method of protecting polymeric materials against hydrogen (H2) permeation by using a sol-gel oxide coating. The sol-gel oxide coating is applied to polymeric surfaces, and it’s a kind of barrier limiting the permeation of hydrogen molecules.

The sol-gel oxide coating is obtained by synthesis so-called wet chemistry, in particular as a result of hydrolysis and condensation reactions using appropriate precursors. The layers are applied to a given polymeric substrate and stabilized. More than one layer can be applied and each layers can have different composition. The thickness of the coating is less than 1 μm.

The table below shows the change in hydrogen permeation at 700 bar (70 MPa) pressure through the polymer (HDPE) with a protective layer obtained according to the offered know-how compared to a polymer without it. Each time the proposed coating is matched to the established substrate, as a result of which the expected interaction of the coating with the substrate is obtained, which determines the stability and efficiency of the solution. Below we present the results obtained for an example of a match that were obtained in experimental studies.

Docelowe branże dla oferowanej technologii

Production of hydrogen (compressed hydrogen CH2) storage tanks.

Protection of existing hydrogen (or other gasses) transmission lines.

Innowacyjność i korzyści z zastosowania technologii

• Considerable reduction of hydrogen permeation through the polymer surface by thin oxide film. For HDPE under 700 bar hydrogen pressure, at least 30%;

• Reduction of the energy losses due to hydrogen leakage;

Poziom gotowości wdrożeniowej oferowanej technologii

TRL 3 – Potwierdzono analitycznie i eksperymentalnie założenia dotyczące technologii

Poziom gotowości wdrożeniowej oferowanej technologii (old)

Testy w warunkach laboratoryjnych

Oferta technologiczna do pobrania

Imię i nazwisko konsultanta

Tomasz Marciniszyn

Numer telefonu stacjonarnego

+48713204195

Adres e-mail

tomasz.marciniszyn@pwr.edu.pl

Adres do korespondencji

ul. Smoluchowskiego 48 / 50-372 Wrocław

Oczekiwana forma komercjalizacji

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