Binary Diffusion Coefficients of the Liquid Organic Hydrogen Carrier System Dibenzyltoluene/Perhydrodibenzyltoluene

Journal article
(Original article)


Publication Details

Author(s): Heller A, Rausch MH, Schulz P, Wasserscheid P, Fröba AP
Journal: Journal of Chemical and Engineering Data
Publisher: American Chemical Society
Publication year: 2016
Volume: 61
Journal issue: 1
Pages range: 504-511
ISSN: 0021-9568
Language: English


Abstract


Liquid organic hydrogen carrier (LOHC) systems constitute a very promising concept for future hydrogen storage and logistics. The concept builds on the conversion of excess renewable energy to hydrogen via electrolysis followed by reversible catalytic hydrogenation/dehydrogenation of a diesel-like organic carrier molecule. For an ideal design of the catalytic process, insight into reaction mechanisms and kinetics but also precise knowledge on mass transport properties are necessary. In the present study, binary diffusion coefficients in selected binary LOHC mixtures with five different compositions of perhydrodibenzyltoluene (H-18-LOHC) and dibenzyltoluene (LOHC) were measured by dynamic light scattering (DLS). The compositions were defined by mixing appropriate amounts of LOHC and H-18-LOHC to realize different hydrogenation degrees of the LOHC. Binary diffusion coefficients were investigated over a temperature range from (264 to 571) K with an absolute uncertainty of (3 to 25) %. Moreover, an empirical equation describing the binary diffusion coefficients of all five mixture compositions over the complete temperature range with a root-mean-square deviation of less than 3 % was established. It was observed that the binary diffusion coefficient is independent of the hydrogenation degree of LOHC at temperatures above 430 K. For lower temperatures, the binary diffusion coefficient increases with decreasing degree of hydrogenation.



FAU Authors / FAU Editors

Fröba, Andreas Paul Prof. Dr.-Ing.
Rausch, Michael Heinrich Dr.-Ing.
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties
Professur für Advanced Optical Technologies - Thermophysical Properties
Heller, Andreas
Professur für Advanced Optical Technologies - Thermophysical Properties
Schulz, Peter Dr.
Lehrstuhl für Chemische Reaktionstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik


Additional Organisation
Erlangen Graduate School in Advanced Optical Technologies


How to cite

APA:
Heller, A., Rausch, M.H., Schulz, P., Wasserscheid, P., & Fröba, A.P. (2016). Binary Diffusion Coefficients of the Liquid Organic Hydrogen Carrier System Dibenzyltoluene/Perhydrodibenzyltoluene. Journal of Chemical and Engineering Data, 61(1), 504-511. https://dx.doi.org/10.1021/acs.jced.5b00671

MLA:
Heller, Andreas, et al. "Binary Diffusion Coefficients of the Liquid Organic Hydrogen Carrier System Dibenzyltoluene/Perhydrodibenzyltoluene." Journal of Chemical and Engineering Data 61.1 (2016): 504-511.

BibTeX: 

Last updated on 2018-22-07 at 07:23