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Speicherung von Wasserstoff in ehemaligem Erdgasspeicher

von Hubert Hunscheidt

Die großvolumige Speicherung von Wasserstoff ist ein wesentliches Element der Energiewende und für den Aufbau einer Wasserstoffwirtschaft in Deutschland. Nur so können die Marktteilnehmer flexibel auf Angebots- und Nachfrageschwankungen reagieren. Strom aus Erneuerbaren Energien kann in Wasserstoff – sogenannten grünen Wasserstoff - mittels Elektrolyse umgewandelt werden und in untertägigen Gasspeichern gelagert werden.

Die bestehenden Gasspeicher sind für Erdgas ausgelegt und müssen für die Verwendung von Wasserstoff umgerüstet werden. Uniper wird dies am seit 2017 nicht mehr kommerziell genutzten Salzkavernenspeicher im norddeutschen Krummhörn in großem Maßstab und in realer Umgebung erproben. Dazu wird eine neue Kaverne unter Verwendung einer bestehenden Bohrung ausgesolt. Der Speicher wird einer der ersten seiner Art sein und soll bis 2024 in Betrieb gehen. Uniper wird in das grüne Zukunftsprojekt mit einem Speichervolumen von bis zu 250.000 m3 Wasserstoff rund 10 Mio. € investieren.

Doug Waters, Managing Director Uniper Energy Storage, sagt: „Uniper hat entschieden, dieses Projekt unabhängig von anderen Förderprojekten voranzutreiben, um die Technologie und die Prozesse möglichst schnell zu erproben. Unser Ziel ist es, eine Speicherlösung für grünen Wasserstoff in kommerziellem Maßstab zu entwickeln und später am Markt anzubieten. Die Speicherfähigkeit von grünem Strom ist eines der Kernthemen der Energiewende und ein wesentlicher Baustein für eine CO2-freie Zukunft.“

Die Nähe zu Wilhelmshaven ermöglicht die Anbindung an das Uniper-Projekt „Green Wilhelmshaven“. Dort entwickelt Uniper gleich zwei Projekte für grünen Wasserstoff: Zum einen ist ein Importterminal für Ammoniak geplant, das in der Lage sein wird, den Ammoniak in Wasserstoff zurück zu verwandeln. Zum anderen sieht Uniper eine Großelektrolyse vor, die mit einer Leistung von bis zu 1.000 MW grünen Wasserstoff erzeugen soll.

Uniper treibt mit jahrzehntelanger Erfahrung und Pioniergeist die Energiewende voran und ermöglicht durch die Speicherung von Erdgas, Wasserstoff und weiteren grünen Gasen auch in Zukunft eine sichere Energieversorgung.

Quelle: Uniper SE / Foto: Jürgen_Acker_pixelio.de

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