Thermophysical properties of the liquid organic hydrogen carrier system based on benzyltoluene considering influences of isomerism and dissolved hydrogen

Kerscher M, Jander JH, Cui J, Maurer LA, Wolf P, Hofmann JD, Köksal A, Zachskorn H, Auer F, Schulz P, Wasserscheid P, Rausch MH, Koller TM, Fröba AP (2024)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2024

Journal

International Journal of Hydrogen Energy Elsevier

Book Volume: 77

Pages Range: 1009-1025

DOI: 10.1016/j.ijhydene.2024.06.131

Abstract

The benzyltoluene (BT)-based liquid organic hydrogen carrier (LOHC) system currently considered for large-scale applications represents a mixture of regioisomers. To characterize this complex system, a comprehensive experimental database for various thermophysical properties of synthesized BT isomers and their mixtures without and with the presence of hydrogen (H2) close to vapor-liquid equilibrium is established using optical and conventional techniques at process-relevant temperatures and pressures up to 573 K and 6 MPa. The surface tension varies by less than 4% among the dehydrogenated (H0-BT) or hydrogenated (H12-BT) isomers. The density and viscosity of mixtures of H0-BT or H12-BT isomers can be described by simple mixing rules with average absolute relative deviations of 0.022% and 0.38%. With increasing H2 pressure, the viscosity remains nearly constant, while the interfacial tension decreases by up to 5%. The thermal and mutual diffusivity of H12-ortho-BT containing dissolved H2 at 6 MPa decrease and increase with increasing temperature.

Authors with CRIS profile

Manuel Kerscher Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Julius Jander Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Junwei Cui Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Anil Köksal Sonderforschungsbereich 1411 Produktgestaltung disperser Systeme / Design of Particulate Products Peter Schulz Lehrstuhl für Chemische Reaktionstechnik Michael Rausch Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Thomas Manfred Koller 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

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE)

How to cite

APA:

Kerscher, M., Jander, J.H., Cui, J., Maurer, L.A., Wolf, P., Hofmann, J.D.,... Fröba, A.P. (2024). Thermophysical properties of the liquid organic hydrogen carrier system based on benzyltoluene considering influences of isomerism and dissolved hydrogen. International Journal of Hydrogen Energy, 77, 1009-1025. https://doi.org/10.1016/j.ijhydene.2024.06.131

MLA:

Kerscher, Manuel, et al. "Thermophysical properties of the liquid organic hydrogen carrier system based on benzyltoluene considering influences of isomerism and dissolved hydrogen." International Journal of Hydrogen Energy 77 (2024): 1009-1025.

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