Thermal conductivity of the benzyltoluene-based liquid organic hydrogen carrier system and its hydrogenated and oxygenated derivatives

Blabus HP, Berger Bioucas FE, Rausch MH, Koller TM, Wasserscheid P, Fröba AP (2026)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2026

Journal

International Journal of Hydrogen Energy Elsevier

Book Volume: 203

Article Number: 152973

DOI: 10.1016/j.ijhydene.2025.152973

Abstract

This work investigates the thermal conductivity λc of the benzyltoluene-based liquid organic hydrogen carrier (LOHC) system relevant for autothermal process concepts. Besides the three regioisomers of the dehydrogenated benzyltoluene (H0-BT), their corresponding hydrogenated and partially oxidized derivatives perhydrobenzyltoluene (H12-BT) and methylbenzophenone (oxo-H0-BT) are studied. Using a guarded parallel-plate instrument, λc is determined at atmospheric pressure and temperatures between (278.15 and 358.15) K with an expanded relative uncertainty of 2 %. The experimental λc data increase from H12-BT via H0-BT to oxo-H0-BT and show no significant influence of regioisomerism for each class. For selected binary H0-BT/H12-BT mixtures, a non-linear behavior for λc as a function of amount fraction was found, while λc of binary H0-BT/oxo-H0-BT mixtures agrees with the values for the pure substances. An available prediction model for λc of cyclic hydrocarbons represents the measurement results for the H0-BT and H12-BT regioisomers reasonably well, yet shows shortcomings in case of the oxo-H0-BT regio-isomer.

Authors with CRIS profile

Hubert Patryk Blabus Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) 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 (SAOT)

Related research project(s)

OXO-LOHC: Autotherme und ultratiefe Wasserstoff-Freisetzung aus LOHC (OXO-Projekt) Nov. 1, 2023 - Oct. 31, 2028

Involved external institutions

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

How to cite

APA:

Blabus, H.P., Berger Bioucas, F.E., Rausch, M.H., Koller, T.M., Wasserscheid, P., & Fröba, A.P. (2026). Thermal conductivity of the benzyltoluene-based liquid organic hydrogen carrier system and its hydrogenated and oxygenated derivatives. International Journal of Hydrogen Energy, 203. https://doi.org/10.1016/j.ijhydene.2025.152973

MLA:

Blabus, Hubert Patryk, et al. "Thermal conductivity of the benzyltoluene-based liquid organic hydrogen carrier system and its hydrogenated and oxygenated derivatives." International Journal of Hydrogen Energy 203 (2026).

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