Collect. Czech. Chem. Commun.
1989, 54, 1508-1513
https://doi.org/10.1135/cccc19891508
Structural and catalytic properties of MoO3-NiO mixed oxides system
Abd El Aziz A. Said, Ehsan A. Hassan, Ahmed M. El-Awad and Khalf-Alla M. Abd El-Salaam
Chemistry Department, Assiut University, Assiut, Egypt
Abstract
The unsupported MoO3-NiO catalysts were investigated. The addition process of NiO was followed by electrical conductivity measurements, IR, XRD, surface area and finally catalytic activity measurements. The conductivity measurements revealed an increase in σ values when 2-propanol vapour was admitted in the gas feed. IR and XRD analysis detected a solid state reaction at about 500 °C and its maximum was shown around 70 mole % Ni2+ where NiMoO4 lattice diffraction type was detected. Parallel with these measurements, the catalytic activity was determined for the catalysts calcined at 500 °C using the decomposition of 2-propanol. The conversion and the selectivity increased as Ni2+ was added to a concentration of 70 mole % Ni2+ ions. The results were discussed in respect to the creation of holes associated to Ni2+ addition.
