Experimental determination of the hydrogenation/dehydrogenation - Equilibrium of the LOHC system H0/H18-dibenzyltoluene

Dürr S, Zilm S, Geißelbrecht M, Müller K, Preuster P, Bösmann A, Wasserscheid P (2021)

Publication Type: Journal article

Publication year: 2021

Journal

DOI: 10.1016/j.ijhydene.2021.07.119

Abstract

Liquid organic hydrogen carrier (LOHC) systems store hydrogen through a catalyst-promoted exothermal hydrogenation reaction and release hydrogen through an endothermal catalytic dehydrogenation reaction. At a given pressure and temperature the amount of releasable hydrogen depends on the reaction equilibrium of the hydrogenation/dehydrogenation reaction. Thus, the equilibrium composition of a given LOHC system is one of the key parameters for the reactor and process design of hydrogen storage and release units. Currently, LOHC equilibrium data are calculated on the basis of calorimetric data of selected, pure hydrogen-lean and hydrogen-rich LOHC compounds. Yet, real reaction systems comprise a variety of isomers, their respective partially hydrogenated species as well as by-products formed during multiple hydrogenation/dehydrogenation cycles. Therefore, our study focuses on an empirical approach to describe the temperature and pressure dependency of the hydrogenation equilibrium of the LOHC system H0/H18-DBT under real life experimental conditions. Because reliable measurements of the degree of hydrogenation (DoH) play a vital role in this context, we describe in this contribution two novel methods of DoH determination for LOHC systems based on ¹³C NMR and GC-FID measurements.

Authors with CRIS profile

Involved external institutions

Universität Rostock Germany (DE)

How to cite

APA:

Dürr, S., Zilm, S., Geißelbrecht, M., Müller, K., Preuster, P., Bösmann, A., & Wasserscheid, P. (2021). Experimental determination of the hydrogenation/dehydrogenation - Equilibrium of the LOHC system H0/H18-dibenzyltoluene. International Journal of Hydrogen Energy. https://doi.org/10.1016/j.ijhydene.2021.07.119

MLA:

Dürr, Stefan, et al. "Experimental determination of the hydrogenation/dehydrogenation - Equilibrium of the LOHC system H0/H18-dibenzyltoluene." International Journal of Hydrogen Energy (2021).

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