Influence of dissolved hydrogen on the viscosity and interfacial tension of the liquid organic hydrogen carrier system based on diphenylmethane by surface light scattering and molecular dynamics simulations

Kerscher M, Klein T, Preuster P, Wasserscheid P, Koller TM, Rausch MH, Fröba AP (2022)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2022

Journal

International Journal of Hydrogen Energy Elsevier

Book Volume: 47

Pages Range: 39163-39178

Journal Issue: 92

DOI: 10.1016/j.ijhydene.2022.09.078

Abstract

In hydrogenation and dehydrogenation processes of liquid organic hydrogen carriers (LOHCs), molecular hydrogen (H2) is present, but its influence on the thermophysical properties of the LOHC compounds is still hardly known. This study provides experimental results from surface light scattering and predictions from molecular dynamics simulations on the influence of dissolved H2 on the liquid viscosity, interfacial tension, and liquid density of the LOHC system based on diphenylmethane at varying degree of hydrogenation, process-relevant temperatures up to 573 K, and pressures up to 7 MPa. First-time measurements of the viscosity of bicyclic hydrocarbon compounds in the presence of dissolved H2 at saturation conditions reveal a negligible effect of pressure. The interfacial tension decreases independently of the LOHC composition by about 6% at 7 MPa. The simulations can adequately represent the effect of H2 on the interfacial tension and evidence a weak enrichment of H2 at the interface.

Authors with CRIS profile

Manuel Kerscher Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Tobias Klein Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Patrick Preuster
Peter Wasserscheid Lehrstuhl für Chemische Reaktionstechnik Thomas Manfred Koller Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Michael Rausch Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Andreas Paul Fröba Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies

Related research project(s)

Thermophysical properties of the LOHC system for conditions related to high-performance release of hydrogen Emissionsfreier und stark emissionsreduzierter Bahnverkehr auf nicht-elektrifizierten Strecken Jan. 1, 2019 - Dec. 31, 2023 Thermophysical Properties of Long-Chained Hydrocarbons, Alcohols, and their Mixtures with Dissolved Gases Nov. 1, 2018 - March 31, 2022

Involved external institutions

Helmholtz-Institut Erlangen-Nürnberg für Erneuerbare Energien (HI-ERN) DE Germany (DE)

How to cite

APA:

Kerscher, M., Klein, T., Preuster, P., Wasserscheid, P., Koller, T.M., Rausch, M.H., & Fröba, A.P. (2022). Influence of dissolved hydrogen on the viscosity and interfacial tension of the liquid organic hydrogen carrier system based on diphenylmethane by surface light scattering and molecular dynamics simulations. International Journal of Hydrogen Energy, 47(92), 39163-39178. https://dx.doi.org/10.1016/j.ijhydene.2022.09.078

MLA:

Kerscher, Manuel, et al. "Influence of dissolved hydrogen on the viscosity and interfacial tension of the liquid organic hydrogen carrier system based on diphenylmethane by surface light scattering and molecular dynamics simulations." International Journal of Hydrogen Energy 47.92 (2022): 39163-39178.

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