Effect of hydrothermal modification on the structure of Ni/Al 2O3 catalyst

An advanced hydrothermal modification method was developed to synthesis Ni/Al2O3 catalyst, including the change of morphology, structure and composition. SEM, XRD, DTA-TG and XPS were used to characterize the textural properties of the materials obtained after each synthesis step. More Ni was absorbed on the surface of Al2O3 particles in the netlike form after hydrothermal modification, The experimental results indicated that the modification of the impregnation samples at elevated temperatures enhanced the absorption of Ni(NO3)2. xH2O on the surface of supporters, leading to the formation of the porous sintering products (NiAl2O 4/Al2O3) with bigger specific surface areas and higher Ni contents.