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Nickel-based catalysts supported on sepiolite catalysts, with a nickel loading between 1 and 10 wt%, have been synthesized by several synthetic strategies (precipitation-deposition, impregnation and grafting-complexation) and subsequent calcination and reduction. The catalysts were characterized by H2 thermoprogrammed reduction (H2-TPR), X-ray diffraction, transmission electron microscopy, N2 adsorption–desorption...
Three sepiolites with differences in composition and structural ordering were treated with 0.2N HCl and 0.2N HNO3 solutions assisted with microwave radiation. This treatment caused in the firsts 16min the progressive Mg2+ depletion of the octahedral sheet, the gradual degradation of the sepiolite structure and the formation of an amorphous silica phase which contributes to a noticeable increase of...
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