Fick Diffusivity, Thermal Diffusivity, Thermal Conductivity, Density, and Mixture Composition of Binary Mixtures of γ-Butyrolactone and 1,4-Butanediol by Light Scattering Techniques and Conventional Methods

Mombeini D, Blabus HP, Rausch MH, Klein T, Koller TM, Hewa Kankanamge CJK, Geißelbrecht M, Wasserscheid P, Fröba AP (2026)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2026

Journal

Book Volume: 47

Article Number: 28

Journal Issue: 2

DOI: 10.1007/s10765-025-03694-3

Abstract

γ-Butyrolactone (GBL) and 1,4-butanediol (BDO) represent a promising liquid organic hydrogen carrier (LOHC) system, for which a lack of thermophysical property data at process-relevant conditions exists. For this LOHC system, the Fick diffusivity D11, thermal diffusivity a, thermal conductivity λ, and density ρ were investigated at about 0.1 MPa as a function of temperature T and mixture composition at GBL amount fractions xGBL = (0.00, 0.25, 0.50, 0.75, and 1.00) using light scattering and conventional techniques. Vibrating U-tube densimetry and a guarded parallel-plate instrument were employed to determine ρ between T = (283 and 473) K and λ between T = (283 and 363) K. Dynamic light scattering allowed simultaneous access to a and D11 between T = (298 and 473) K in macroscopic thermodynamic equilibrium, while polarization-difference Raman spectroscopy was applied after calibration to monitor the composition. The onset of a certain decomposition or structural rearrangement was observed above about T = 398 K, depending on the sample composition and experimental boundary conditions. When such effects are small, the data for ρ, a, and D11 increase with increasing xGBL at a given T, whereas λ has the opposite trend. With the help of the results for ρ, a, and λ, values for the specific isobaric heat capacity cp could be derived. The present measurement results agree with the few experimental data for ρ and λ available in the literature for the pure mixture components and contribute to a significant extension of the thermophysical property database for this highly promising LOHC system.

Authors with CRIS profile

Additional Organisation(s)

Related research project(s)

Involved external institutions

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

How to cite

APA:

Mombeini, D., Blabus, H.P., Rausch, M.H., Klein, T., Koller, T.M., Hewa Kankanamge, C.J.K.,... Fröba, A.P. (2026). Fick Diffusivity, Thermal Diffusivity, Thermal Conductivity, Density, and Mixture Composition of Binary Mixtures of γ-Butyrolactone and 1,4-Butanediol by Light Scattering Techniques and Conventional Methods. International Journal of Thermophysics, 47(2). https://doi.org/10.1007/s10765-025-03694-3

MLA:

Mombeini, Dena, et al. "Fick Diffusivity, Thermal Diffusivity, Thermal Conductivity, Density, and Mixture Composition of Binary Mixtures of γ-Butyrolactone and 1,4-Butanediol by Light Scattering Techniques and Conventional Methods." International Journal of Thermophysics 47.2 (2026).

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