III International Conference

PP-II-99DESIGN OF STRUCTURED CATALYSTS BASED ON CERAMIC AND METALLICMONOLITHS FOR SYNGAS PRODUCTION VIA PARTIAL OXIDATION OFNATURAL GASPavlova S.N., Sadykov V.A., Bunina R.V., Snegurenko O.I., Tikhov S.F., Vostrikov Z.Y.,Pinaeva L.G., Kuzmin V.A., UlianitskyV. 1Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia1 Lavrentiev Institute of Hydrodynamics SB RAS, RussiaE-mail: Pavlova@catalysis.nsk.suThe catalysts comprised of CeO 2 -ZrO 2 and LaNiO x promoted by Pt supported on fullsizedcorundum and metallic monolith substrates were developed and studied in catalyticpartial oxidation of methane (POM) using an autothermal reactor at transient and stationaryconditions. The effect of substrates thermal conductivity, linear velocity, feed compositionand inlet temperature on catalytic activity in POM was elucidated. The monolith catalysts ofdifferent types were shown to be very efficient in a wide range of contact times and stable attemperatures up to 1200 °C.Catalytic partial oxidation of methane at short contact times is now considered as anattractive technology for the small-scale and distributed production of syngas in the stationaryand mobile fuel processing [1,2]. Realization of POM at short contact times (< 0.1 sec) allowsto reduce the size of the fuel processor and requires application of monolithic catalysts witha low pressure drop. The use of metallic substrates with high thermal conductivity decreasesthe temperature gradients within the monolithic catalysts thus increasing thermal stabilityduring start-up. Furthermore, due to mild exothermicity, the process can be realized in theauthothermal regime ensures a high yield of syngas. However, several problems associatedwith performance of known monolith catalysts exist. They are the insufficient thermalstability and conductivity of monolith ceramic supports, evaporation of Rh(Pt) due to hightemperatures developed in the inlet part of a monolith, deactivation due to carbon build up inthe outlet zone.In this work, to solve these problems, new types of monolith supports and more stableactive components were developed [2]. Here, results on design of highly active in POM andstable under high temperature operation structured catalysts based on full-sized ceramic andmetallic monoliths are presented. The comparative study on performance of these catalystswith active components comprised of CeO 2 -ZrO 2 and LaNiO x promoted by Pt was performedin both transient and stationary conditions using POM autothermal reactor.To prepare catalysts, different types of full-sized monolithic substrates were used: thinwallcorundum monoliths and metallic monoliths based on fechraloy foil or gause. The343