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Water Removal from LOHC Systems

1
Institute of Separation Science and Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
2
Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstraße 3, 91058 Erlangen, Germany
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Institute for Technical Thermodynamics, University of Rostock, Albert-Einstein-Str. 2, 18059 Rostock, Germany
4
Institute of Chemical Engineering & Technology, University of the Punjab, Lahore 54590, Pakistan
*
Author to whom correspondence should be addressed.
Hydrogen 2020, 1(1), 1-10; https://doi.org/10.3390/hydrogen1010001
Received: 11 July 2020 / Revised: 24 September 2020 / Accepted: 28 September 2020 / Published: 10 October 2020
Liquid organic hydrogen carriers (LOHC) store hydrogen by reversible hydrogenation of a carrier material. Water can enter the system via wet hydrogen coming from electrolysis as well as via moisture on the catalyst. Removing this water is important for reliable operation of the LOHC system. Different approaches for doing this have been evaluated on three stages of the process. Drying of the hydrogen, before entering the LOHC system itself, is preferable. A membrane drying process turns out to be the most efficient way. If the water content in the LOHC system is still so high that liquid–liquid demixing occurs, it is crucial for water removal to enhance the slow settling. Introduction of an appropriate packing can help to separate the two phases as long as the volume flow is not too high. Further drying below the rather low solubility limit is challenging. Introduction of zeolites into the system is a possible option. Water adsorbs on the surface of the zeolite and moisture content is therefore decreased. View Full-Text
Keywords: LOHC; purification; drying; phase separation; dibenzyl toluene; hydrogen storage LOHC; purification; drying; phase separation; dibenzyl toluene; hydrogen storage
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MDPI and ACS Style

Müller, K.; Aslam, R.; Fikrt, A.; Krieger, C.; Arlt, W. Water Removal from LOHC Systems. Hydrogen 2020, 1, 1-10. https://doi.org/10.3390/hydrogen1010001

AMA Style

Müller K, Aslam R, Fikrt A, Krieger C, Arlt W. Water Removal from LOHC Systems. Hydrogen. 2020; 1(1):1-10. https://doi.org/10.3390/hydrogen1010001

Chicago/Turabian Style

Müller, Karsten, Rabya Aslam, André Fikrt, Christoph Krieger, and Wolfgang Arlt. 2020. "Water Removal from LOHC Systems" Hydrogen 1, no. 1: 1-10. https://doi.org/10.3390/hydrogen1010001

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