Hydrogen Storage in Semiclathrate Hydrates of Tetrabutyl Ammonium Chloride and Tetrabutyl Phosphonium Bromide

Abstract : Original calorimetric and phase equilibrium properties for hydrogen + tetrabutylammonium bromide (TBAB), tetrabutylammonium chloride (TBACl), or tetrabutylphosphonium bromide (TBPB) semiclathrate hydrates were measured using differential scanning calorimetry under pressure. The dissociation temperatures of H2 + TBACl and H2 + TBPB semiclathrate hydrates are very close to the ambient temperature at low pressures around 15.0 MPa. H2 + TBACl and H2 + TBPB systems therefore exhibit better and comparable stability than the H2 + TBAB system at equivalent pressure, respectively. The amount of hydrogen stored in H2 + TBACl and H2 + TBPB semiclathrate hydrates was estimated in terms of the H2-to-water mole ratio (nH2/nH2O) calculated from disssociation enthalpies and (p, T) equilibrium data. In terms of mass fraction deduced from the ratio (nH2/nH2O), H2 + TBACl and H2 + TBPB semiclathrate hydrates can store 0.12 % and 0.14 % of hydrogen, respectively. Moreover, the quantity of hydrogen stored in these two semiclathrate hydrates is significantly higher than that stored in the H2 + TBAB system.
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Journal of Chemical and Engineering Data, American Chemical Society, 2010, 55 (9), pp.3395-3399. 〈10.1021/je100146b〉
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Contributeur : Didier Dalmazzone <>
Soumis le : jeudi 23 juillet 2015 - 10:03:27
Dernière modification le : jeudi 16 novembre 2017 - 17:14:19

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Johnny Deschamps, Didier Dalmazzone. Hydrogen Storage in Semiclathrate Hydrates of Tetrabutyl Ammonium Chloride and Tetrabutyl Phosphonium Bromide. Journal of Chemical and Engineering Data, American Chemical Society, 2010, 55 (9), pp.3395-3399. 〈10.1021/je100146b〉. 〈hal-01179644〉

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