Organic compounds that can absorb and release hydrogen through chemical reactions
Scheme of an LOHC process for storing electrical energy
Liquid organic hydrogen carriers (LOHC) are organic compounds that can absorb and release hydrogen through chemical reactions. LOHCs can therefore be used as storage media for hydrogen. In principle, every unsaturated compound (organic molecules with C-C double or triple bonds) can take up hydrogen during hydrogenation. The sequence of endothermal dehydrogenation followed by hydrogen purification is considered as the main drawback which limits the overall efficiency of the storage cycle.[1] LOHC shipping without heat recycling has an energy efficiency of 60-70%, depending on the dehydrogenation rate, which is equivalent to liquid hydrogen shipping. With heat recycling, the energy efficiency increase to 80-90%.[2][3]
In 2020, Japan built up the world's first international hydrogen supply chain between Brunei and Kawasaki City utilizing toluene-based LOHC technology.[4] Hyundai Motor invests in the development for stationary and on-board LOHC-systems.[5]
^G. Sievi, D. Geburtig, T. Skeledzic, A. Bösmann, P. Preuster, O. Brummel, ... & J. Libuda (2019). Towards an efficient liquid organic hydrogen carrier fuel cell concept. In: Energy & Environmental Science, 12(7), 2305-2314.
^Wang, Hewu; Zhou, Xin; Ouyang, Minggao (26 October 2016). "Efficiency analysis of novel Liquid Organic Hydrogen Carrier technology and comparison with high pressure storage pathway". International Journal of Hydrogen Energy. 41 (40): 18062–18071. doi:10.1016/j.ijhydene.2016.08.003.
^Cite error: The named reference Abdin2021 was invoked but never defined (see the help page).
^‘World’s first international hydrogen supply chain’ realised between Brunei and Japan, RECHARGE, 2020-04-27.
^Hyundai Motor invests in Hydrogenious LOHC Technologies, Bioenergy International, 2020-06-04.
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