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From soil to lab: Utilization of clays as catalyst supports in hydrogen generation from sodium borohydride fuel |
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| Authors: | R Chamoun B Demirci D Cornu R Khoury P Miele |
| Affiliation: | a Université Lyon 1, CNRS, UMR 5615, Laboratoire des Multimatériaux et Interfaces, 43 boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France b Université Libanaise, Faculté des Sciences II, Laboratoire de physique appliquée, 90656 Jdeidet El Metn, Lebanon c Université Montpellier 2, CNRS-ENSCM, UMR 5635, Institut Européen des Membranes, 300 avenue du Pr. E. Jeanbrau, F-34095 Montpellier, France d Université Libanaise, Faculté d’Agronomie, 90656 Jdeidet El Metn, Lebanon |
| Abstract: | The stabilized aqueous solution of sodium borohydride NaBH4 is a promising hydrogen fuel but the stored hydrogen has to be released with the help of a catalyst through hydrolysis. In the present study, we developed Co- and clay-based supported catalysts. Three raw clays were taken from soil in Lebanon. Once purified and annealed, they were used as supports. Two of them, mainly composed of kaolinite and illite respectively, showed to be promising owing to their attractive specific surface areas (58.0 and 67.1 m2 g−1) as well as the high reactivity of the corresponding 15 wt.% Co catalysts (i.e. NaBH4 conversions of 100% and hydrogen generation rates up to ∼31 L(H2) min−1 g−1(Co)). A kinetic study was also carried out. The main results are reported and discussed herein. |
| Keywords: | Clay Cobalt Hydrogen evolution Hydrolysis of sodium borohydride Supported catalyst |
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