Synthesis and Investigation of Nickel–Aluminum Oxide Catalysts on a Carbon Support

Samples of catalysts obtained by impregnating activated carbon with the oxides NiO and Al2O3 were investigated. It was shown that increase in the ratio of nickel and aluminum cations in the impregnating solution from 2:1 to 3:1 leads to decrease in the average pore diameter and to increase in the specific surface area of the activated carbon by 1.5 times. Activated carbons impregnated by nickel and aluminum oxides with the metal cation of the impregnating solution in a ratio of 3:1 and calcined in a stream of hydrogen have the largest surface area in pores with diameter of 10-200 nm. Heat treatment of the nickel–aluminum oxide catalysts on a carbon support at 450°С in a stream of hydrogen leads to increase of the pore size and to decrease of the specific surface area. Mechanical activation of the oxide catalysts on the carbon support by ultrasonic treatment increases the outer surface area of the particles by more than twice.