Organic liquid carriers for hydrogen storage

2 Organic hydrides chemistry and reactions for hydrogen storage and supply 

4-dihydrocyclohexane and 2-propanol in 6 and 3 wt% hydrogen capacity, respectively. Recently, Fez et al. reported [11] that perhydro-A-ethyl carbazole works as a liquid carrier in c. 3 wt% weight hydrogen capacity in 

7 Comparison of hydrogen storage capacity and reversibiiity of dehydrogenation and rehydrogenation of various organic compounds. 

Organic hydrides Aromatics Weight capacity (wt% H) Volume capacity KHj)/ Reactivity (H2 l/min/g Pt) Toxicity Liquidity (bp/mp °C) Economic availability (million tonne/year) 

Naphthalene and biphenyl as aromatics are dissolved in their organic hydrides such as decalin and bicyclohexyl as the mixed solutions which keep their liquidity at lower temperatures below -30°C. 

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Dehydrogenation activities, compared for tetralin and decalin [5,12] under the same superheated liquid-film conditions over the same Pt/C catalyst, exhibited around 3.9-63 times preference of tetralin (Table 13.3), which can certainly be ascribed to advantageous adsorption due to the a-bonding capability of its aromatic part [17-19]. It was, thus, confirmed experimentally that tetralin is superior to decalin as the organic hydrogen carrier for stationary applications in terms of rapid hydrogen supply or power density, provided that the density of fuel storage is unimportant. 

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