A Reversible Liquid-to-Liquid Organic Hydrogen Carrier System Based on Ethylene Glycol and Ethanol |
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| Authors: | Quan-Quan Zhou You-Quan Zou Yehoshoa Ben-David Prof. David Milstein |
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| Affiliation: | 1. Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, 76100 Israel These authors contributed equally to this work.;2. Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, 76100 Israel |
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| Abstract: | Liquid organic hydrogen carriers (LOHCs) are powerful systems for the efficient unloading and loading molecular hydrogen. Herein, a liquid-to-liquid organic hydrogen carrier system based on reversible dehydrogenative coupling of ethylene glycol (EG) with ethanol catalysed by ruthenium pincer complexes is reported. Noticeable advantages of the current LOHC system is that both reactants (hydrogen-rich components) and the produced esters (hydrogen-lean components) are liquids at room temperature, and the dehydrogenation process can be performed under solvent and base-free conditions. Moreover, the hydrogenation reaction proceeds under low hydrogen pressure (5 bar), and the LOHC system has a relatively high theoretical gravimetric hydrogen storage capacity (HSC>5.0 wt %), presenting an attractive hydrogen storage system. |
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| Keywords: | dehydrogenation ethanol ethylene glycol hydrogen carriers ruthenium pincer complexes |
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