STRUCTURAL AND TEXTURAL PROPERTIES OF SOME SUPPORTED NICKEL-CATALYSTS

Nickel/alumina, nickel/alumina-chromia and nickel/chromia supported ca talysts have been prepared by impregnation method. The DTA and X-ray t echniques have been used to investigate the influence of the support o n the formation of the active phase. It is found that alumina, alumina -chromia and chromia affect the formation of nickel oxide and/or nicke l metal. The surface areas and pore structures have been determined us ing low temperature nitrogen adsorption technique. The results indicat e that the addition of nickel to alumina, alumina-chromia and chromia changes the textural properties of the supports. Nickel promotes both activation and sintering of the supports.