Abstract
Abstract The hydrogen absorption properties of slurries composed of La 1.8 Ca 0.2 Mg 17− x Ni x alloy powder suspended in liquid C 6 H 6 were investigated. It is found that the La 1.8 Ca 0.2 Mg 14 Ni 3 in benzene liquid has similar hydrogen absorption properties as that of the hydrogen-alloy (gas–solid) reaction and the alloy has a strong catalytic effect on hydrogenation reaction of C 6 H 6 . The amount of hydrogen absorbed and the hydriding kinetics are related to the temperature, the solid/liquid weight ratio and the surface catalytic activity of the alloy. When the temperature of the slurry is ∼473 K, it acquires a good hydriding rate. The hydrogen absorption capacity of the slurry system composed of 50 wt.% La 1.8 Ca 0.2 Mg 14 Ni 3 alloy and 50 wt.% C 6 H 6 reaches 5.5 wt.% of hydrogen at 483 K and 4.5 MPa in 240 min. Results of XRD, XPS and SEM analysis on the crystal structure, surface structure and configuration of the alloy correlated with its catalytic activity are reported and discussed.
Published Version
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