abstracts - Институт катализа им. Г.К. Борескова

NEW ADVANCED CATALYSTS ON THE BASIS OF URANIUM OXIDESIsmagilov Z.R.Boreskov Institute of Catalysis SB RAS, Novosibirsk, RussiaE-mail: zri@catalysis.ruKS-I-7The uranium oxides are the most complex in metal – oxygen combination composite systems.This is caused not only by a multitude of uranium valence states, but also by the existence ofnumerous polymorphic modifications, solid solutions, compounds of variable compositionand metastable phases. There are at least 10 individual uranium oxides and 14 mutualmodifications of these oxides. The first part of the lecture is devoted to review of literatureand patent survey on uranium oxide catalysts. Peculiarities of this system, results offundamental studies and examples of practical application will be discussed in detail. Data onmixed oxides of uranium with vanadium, tungsten, molybdenum, chromium, cobalt, rare earthmetals for catalysis also will be presented.We developed preparation of bulk uranium oxide catalysts by precipitation from uranyl nitrateand uranyl oxalate solutions followed by drying and calcination and by plasma-chemicaltechnology.Several techniques have been modified for preparation of supported catalysts.Investigation of the catalytic activity of bulk and supported uranium catalysts have beenperformed in following reactions.-oxidation of methane- oxidation of butane- wet and dry methane reforming for production of syngas- catalytic partial oxidation of methane- dehydroaromatization of methane- oxidation of chlorinated hydrocarbons- hydrodesulphurization of thiopheneCatalysts were studied and characterized by a number of physicochemical methods:XRD, XPS, EXAFS, DRS, FTIR, TPD, TPR, TPO, adsorption methods and etc.Conclusions on prospective for uranium oxide catalysts will be highlighted.37