Effect of y-Irradiation on the Chemisorption and Catalytic Activity of Ni/Al2O3 and Co/Al203 Systems

摘要

The textural properties of non-irradiated and y-irradiated Ni/Al2O3 and Co/Al2O3 systems with different chemical compositions were determined from the adsorption of nitrogen at 77 K. Chemisorption of hydrogen at 320 K and hydrogenation of benzene at 400 K were studied on the reduced catalysts. The surface areas of y-irradiated catalysts are higher than those of their non-irradiated equivalents, y-lrradiation also increases the hydrogen uptake, the metallic surface area and the percentage dispersion of the metal on the support. The hydrogenation activity also increases upon irradiation with y-rays. All these changes are more pronounced in catalysts with a high metal loading.