How back reaction, hydrogen transport, and capillarity control the performance of hydrogen release from liquid organic carriers
Nizkaia T, Solymosi T, Malgaretti P, Wasserscheid P, Harting J (2026)
Publication Type: Journal article
Publication year: 2026
Journal
Book Volume: 164
Article Number: 194110
Journal Issue: 19
DOI: 10.1063/5.0324967
Abstract
We derive a theoretical model to elucidate the inhibition of catalytic activity during the dehydrogenation of Liquid Organic Hydrogen Carriers (LOHCs). Within our model, we account for the reversible nature of the hydrogenation–dehydrogenation reaction as well as the transport of both LOHC and produced hydrogen. Our analysis reveals that the main limiting factor for the performance of porous catalysts is the transport of dissolved hydrogen, which has been overlooked so far. In particular, we show that two distinct kinetic regimes can arise depending on whether hydrogen leaves the pellet in the form of bubbles or via diffusion. Moreover, we derive the conditions for the onset of bubbling depending on hydrogen supersaturation and capillarity. Beyond LOHC systems, our findings are applicable to a broader class of reversible reactions, particularly those involving volatile products that can leave the liquid reaction medium in the form of bubbles.
Involved external institutions
Germany (DE)How to cite
APA:
Nizkaia, T., Solymosi, T., Malgaretti, P., Wasserscheid, P., & Harting, J. (2026). How back reaction, hydrogen transport, and capillarity control the performance of hydrogen release from liquid organic carriers. Journal of Chemical Physics, 164(19). https://doi.org/10.1063/5.0324967
MLA:
Nizkaia, T., et al. "How back reaction, hydrogen transport, and capillarity control the performance of hydrogen release from liquid organic carriers." Journal of Chemical Physics 164.19 (2026).
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