Mgal2o4 gel-supported metal ni catalyst, method for preparing the same, and use thereof

Abstract

This invention discloses a MgAl2O4 gel-supported Ni catalyst, its preparation method, and its applications. A simple and efficient one-pot method combining strong and weak reducing agents is used to regulate the reduction rate of the metal salt precursor and the uniformity of Ni particles. A pre-reduced solution of small-sized Ni nanoparticles is gelled together with a MgAl2O4 precursor solution, directly and uniformly anchoring small Ni particles within the ultra-stable and ultra-large surface area of ​​the MgAl2O4 gel structure. This achieves small particle size and high dispersion of active Ni, and strengthens the interaction between Ni and the MgAl2O4 support. Simultaneously, the surface acidity of MgAl2O4 is significantly weaker than that of industrial Al2O3, reducing coking during fuel reforming. High-temperature calcination of the mixed gel under a N2 protective atmosphere yields a highly active and thermally stable supported Ni / MgAl2O4 reforming catalyst, further improving its thermal stability and anti-coking properties. This enhances its catalytic activity and durability for hydrocarbon fuel steam reforming, and is of great significance for hydrogen production from hydrocarbon fuel steam reforming.

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