Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

OP-3-7HYDROGEN AND SYNGAS PRODUCTION BY ETHANOL STEAMREFORMING OVER COMPOSITE CATALYSTS COMPRISED OFNi/YSZ AND COMPLEX OXIDESMezentseva N. 1 , Alikina G. 1 , Krieger T. 1 , Ishchenko A. 1 ,Smorygo O. 2 , Sadykov V. 1,31 Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia, mnv@catalysis.ru2 Powder Metallurgy Institute, Minsk, Belarus3 Novosibirsk State University, Novosibirsk, RussiaTransformation of biofuels into syngas or hydrogen via steam reforming is nowconsidered as one of the most important task of catalysis in the energy-related fields.However, due to a high reactivity of oxygenates a heavy coking is observed leadingto the catalyst deactivation. To deal with this phenomenon, active componentscomprised of complex oxides with a high lattice oxygen mobility (favors efficientgasification of coke precursors) promoted by precious metals (responsible foroxygenates activation) are suggested [1]. Ethanol is one of the major componentswhich are present in biofuels and hence, ethanol steam reforming (ESR) is a suitablereaction for the development of an efficient bio-oil processing via SR.In the present work, the nanocomposite catalysts based on Ni/YSZ (20-90wt.%)cermets co-promoted with SmPrCeZrO or LaPrMnCrO oxides (80-10wt.%) and Pt orRu were synthesized by modified Pechini method. Samples were characterized byBET, XRD, TEM with EDX, C 2 H 5 OH (1% in He) TPR and their subsequent TPOx byH 2 O (1% in He). The catalytic properties of nanocomposite catalysts were studied inthe SR of ethanol in diluted and realistic feeds at short contact time.Applied preparation procedures result in pronounced interaction betweennanocrystalline active components including decoration of NiO/Ni particles by oxidicfragments, epitaxial intergrowth between particles of different phases, incorporationof Ni, Pt and Ru cations into perovskite or fluorite particles directly revealed by EDXand reflected in variation of lattice spacings and particle sizes. All studied samplesdemonstrate a high and stable performance in the steam reforming of ethanol in theintermediate temperature range (500-600 o C). For samples with the low (20%) Ni/YSZcontent promotion by Pt or Ru does not improve performance determined mainly bythe oxygen mobility in fluorite or perovskite oxides and accessible Ni surfacedecorated by oxidic species. Performance of best compositions supported as porousstrongly adhering layers on crofer/fechraloy nonporous/porous monolithic substrateswas demonstrated to be also high and stable in ESR ensuring reformate compositionclose to equilibrium.[1]. J.P.Breen, R. Burch, H.M. Coleman, Appl.Cat. B 39 (2002) 65.Acknowledgements: This work is supported by Integration Project 57 of SB RAS andProject 57 of Presidium RAS.75