Effect of Prepration Method on Activity of Ni/Mg/Al Catalysts Prepared From Hydrotalcite Precursors in Dry Reforming of Methane

The reaction of CO₂ methane reforming was tested over hydrotalcite-based catalysts containing nickel. In order to study the effet of Ni/Mg/Al synthesis methods.  Ni/Mg/Al solids were prepared via three ways: (i) coprecipitation at basic pH of Ni²⁺, Mg²⁺ and Al³⁺ to obtain NiMgAl sample. (ii) MgAl-NiY sample prepared by Chelation-based techniques. (iii) The final way is common impregnation of Ni salts on MgAl hydrotaclite calcined at 450°C and was noted Ni/MgAl. X-ray diffraction (XRD), Brunauere Emmette Teller Method (BET), Temperature Programmed Reduction (TPR), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) were used to describe completely the structural, morphological and surface characteristics of the solids. After reduction at 750°C for one hour, the catalysts were evaluated   at the same temperature (750°C), in the dry reforming of methane reaction under continuous flow with CH₄/CO₂ ratio equal to 1, at atmospheric.