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Durability and reutilization capabilities of a Ni-Ru catalyst for the hydrolysi...
A.M.F.R.Pinto; M.J.F. Ferreira; V.R. Fernandes; C. M. RangelThe study of catalyst durability and reutilization on catalyzed hydrolysis of sodium borohydride is essential from an application point of view. Few works on this topic are available in the literature. In the present work, a powder nickel-ruthenium based catalyst, unsupported, used in two different schemes of NaBH 4 hydrolysis (alkaline and alkali free hydrolysis), performed in batch reactors with different vol...
Alkali free hydrolysis of sodium borohydride for hydrogen generation under pres...
M.J.F. Ferreira; L. Gales; V.R. Fernandes; C.M. Rangel; A.M. F. R. PintoThe present study is related with the production of hydrogen gas (H 2), at elevated pressures and with high gravimetric storage density, to supply a PEM fuel cell on-demand. To achieve this goal, solid sodium borohydride (NaBH4) was mixed with a proper amount of a powder reused nickel-ruthenium based catalyst (Ni-Ru based/NaBH4: 0.2 and 0.4 g/g; ≈150 times reused) inside the bottom of a batch reactor. The...
Effects of the addition of an organic polymer on the hydrolysis of sodium tetra...
M.J.F. Ferreira; V.R. Fernandes; L. Gales; C.M. Rangel; A.M. F. R. PintoAn experimental study is presented both on the generation and storage of molecular hydrogen (H2) by small additions of an organic polymer - carboxymethyl cellulose (CMC) - to sodium borohydride (NaBH4) through the alkaline hydrolysis, in the presence of a powdered nickel-ruthenium based catalyst reused from 274 to 282 times. The experiments were performed at 45 °C in two batch reactors with internal volumes of ...
Successive loadings of reactant in the hydrogen generation by hydrolysis of sod...
M. J. F. Ferreira; V. R. Fernandes; C. M. Rangel; L. Gales; A. M. F. R. PintoIn this paper, for the first time, an experimental investigation is presented of five successive loadings of reactant alkaline solution of sodium borohydride (NaBH4) for hydrogen generation, using an improved nickel-based powder catalyst, under uncontrolled ambient conditions. The experiments were performed in two batch reactors with internal volumes of 0.646 l and of 0.369 l. The compressed hydrogen generated,...
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