III International Conference

PP-II-117CO OXIDATION ON CuO-CeO 2 /γ-Al 2 O 3 CATALYSTS PREPARED BY SURFACESELF-PROPAGAITING THERMAL SYNTHESIS (SSTS) METHODShlyapin D.A., Shitova N.B., Tsyrulnikov P.G.Institute of hydrocarbons processing SB RAS, Omsk, RussiaE-mail: dash@incat.okno.ruThe goal of this work was preparation of CuO-CeO 2 /γ-Al 2 O 3 catalysts by means ofsurface self-propagating thermal synthesis (SSTS) instead of conventional impregnation andinvestigation of its activity in CO oxidation reaction. СuO and CeO 2 precursors wereCu(NO 3 ) 2 and Ce(NO 3 ) 3 , respectively. In the case of SSTS citric acid was used as a fuel dopealong with precursors. All activity tests were carried out in temperature range 50÷150 ºC. Thereaction mixture consisting of CO (1% vol), O 2 (2% vol) and H 2 or N 2 as a balance was usedin this study. It was observed that catalysts prepared by SSTS method show higher activity incomparison with impregnated catalysts.This work continues the investigation in the field of catalysts preparation by activecomponents self-propagating thermal synthesis on the surface of the various supports such asporous metal hire, honeycomb cordierite blocks, glass fiber fabric which are widelyinvestigated in laboratory of catalytic conversion of hydrocarbons (IHP SB RAS) during lastfew years [1, 2].Earlier we carried out the study of supported CuO-CeO 2 /γ-Al 2 O 3 catalysts, prepared byconventional impregnation method in reaction of selective CO oxidation in the presence ofhydrogen in collaboration with laboratory of catalytic processes in fuel cells of BIC SB RAS.This process is very important for hydrogenous mixture cleaning before its feeding the fuelcell.The goal of this work was synthesis of CuO-CeO 2 /γ-Al 2 O 3 catalysts by surface selfpropagatingthermal synthesis method (SSTS) and by impregnation method and investigationof its activity in CO oxidation reaction.We used Cu(NO 3 ) 2 and Ce(NO 3 ) 3 as active component precursors and citric acid wasused as a fuel dope. The samples prepared were studied by XRD and texture investigationtechnique. Atomic-absorptive method was used to determine the active componentconcentration. The activity tests in CO oxidation reaction were carried out in flow-circulationsetup in temperature range 50÷150ºC. The reaction mixture used for this work containsfollowing components: CO (1% vol.), O 2 (2% vol.) and H 2 or N 2 as a balance.It was observed that SSTS prepared catalysts are more active in CO oxidation at bothreaction conditions than the impregnated ones. We suppose that the high activity of SSTS379