Effects of genesis and ionizing radiation on the kinetics of reduction of NiO-CeO2 mixed oxides with hydrogen

The reduction of mixed oxides NiO-CeO2 of various composition with hydrogen was studied at 290-470 deg by means of thermogravimetry. Some physicochemical properties of the system were also investigated and compared with earlier studied analogous samples of different 'origin'. The degree of mutual interaction of the two components, the reduction kinetics and the sensitivity to the different sorts of radiation (gamma-rays, fast neutrons and electrons), applied in different doses, are strongly affected by the prehistory and by the composition in both compared series of mixed oxides. (author)