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OP-I-8TRANSIENT KINETIC STUDIES OF DRY REFORMING OF METHANEOVER Pt/PrCeZrO CATALYSTVladislav Sadykov 1,2 , Nataliya Sazonova 1 , Elena Gubanova 1 ,Svetlana Pokrovskaya 1,2 , Nataliya Chumakova 1,2 , Alexey Bobin 1,3 ,Yves Schuurman 3 , Claude Mirodatos 31 Boreskov Institute of Catalysis SB RAS, 630090, pr. Lavrentieva 5,Novosibirsk, Russia, pokrov@catalysis.ru2 Novosibirsk State University, 630090, Pirogova 2, Novosibirsk, Russia3 Institut de Recherches sur la Catalyse et l’Environnement de Lyon,F-69626Villeurbanne cedex, FranceEver-growing interest to the dry reforming of methane (DRM) is connected withthe possibility to convert two greenhouse gases into syngas with H 2 /CO ratio close tothe most suitable for synfuels production, and the task arises to develop active andstable catalysts for both environmental and industrial applications. Pt/ZrO 2 catalystswere shown to be more attractive systems in this process than Ni-based catalysts[1,2]. DRM studies over Pt/LnCeZrO catalysts (where Ln = La, Gd, Pr) revealed thatactivity and stability to coking increase in the order La < Gd < Pr correlating withlattice oxygen mobility [3]. This paper presents the results of transient kinetic studiesaimed at elucidating the main factors controlling the catalytic properties and stabilityof Pr-doped catalyst in DRM at short contact times.Experimental and modeling. Dispersed complex oxide Pr 0.3 Ce 0.35 Zr 0.35 O x wasprepared via Pechini route. The complex oxides were supported on the walls oftriangular fragment of α-Al 2 O 3 monolith with one straight channel, Pt (1.4 wt.%) wasloaded from a H 2 PtCl 6 solution by incipient wetness impregnation [4]. Transientkinetic experiments were carried out using quartz reactor of 4-6 mm ID with aseparate catalytic fragment [3]. Before reactions, samples were pretreated at 700°Cin stream of O 2 . Reaction mixture was fed to the oxidized catalyst with CH 4concentration of 7% vol. and CH 4 :CO 2 ratio 1:1 at temperature 750°C and contacttime 4.7-8 ms.The mathematical model of processes in such a catalytic system was developedthat accounts for the conversion of oxygen-containing species on the catalyst surfaceby reaction steps and the surface/near surface mobility of oxygen. On the base of thesoftware developed a number of computational runs were performed at processparameters corresponding with the experimental transients to characterize thecatalyst structure and evaluate the rates of main catalytic stages.51