Effect of genesis on the properties and hydrogen reducibility of NiO-ZnO mixed oxides.

The physico-chemical properties and reactivity tested by hydrogen have been studied for two series of NiO-ZnO mixed oxides of various composition. The solid nickel oxide or zinc oxide in interaction with the solution of nitrate of the second component were used as the precursors in each series. The differences in some physico-chemical parameters of the samples in both series were correlated with their reduction behaviour, followed both in iso- and non-isothermal regime. Moreover, the influence of various factors modifying the reactivity of mixed oxides was also investigated and the results were compared with those obtained from earlier studied analogous systems of quite different origin. [ABSTRACT FROM AUTHOR]