Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

OP-3-8CATALYTIC STEAM REFORMING OF BIOMASS-DERIVEDOXYGENATESSoykal I. 1 , Mirkelamoglu B. 1 , Song H. 1 , Bao X. 2 , Hadad C.M. 2 , Ozkan U.S. 1The Ohio State University, Department of Chemical and Biomolecular Engineering 1and Department of Chemistry 2 , 140 W 19 th Avenue, Columbus, Ohio 43210-USAFax: (1) 614-292-3769, E-mail: ozkan.1@osu.eduSignificant research efforts are being devoted to development of catalyticprocesses for utilizing renewable resources for energy. One such process is catalyticsteam reforming of biomass-derived oxygenated hydrocarbons, such as ethanol,dimethyl-ether (DME) and methanol. Catalyst deactivation arising from metalsintering and/or deposition of carbonaceous species during steam reforming ofoxygenated hydrocarbons is a commonly cited problem over various catalyticsystems. The development of active and stable catalytic systems based on nonnoblemetals is important for making the technology economically viable. At the sametime, understanding of the nature of the active sites and reaction pathways is vital fortailoring the catalysts for improved activity and stability. Previously, we have shownthat supported cobalt catalysts constituted active catalysts for ethanol steamreforming [1-6], achieving high hydrogen yields and high stability. A wide array oftechniques including, X-ray diffraction, X-ray photoelectron spectroscopy,transmission electron microscopy, thermogravimetry, and scanning calorimetry wereutilized to characterize the catalysts. Operando Raman spectroscopy with isotopiclabeling was used to demonstrate oxygen exchange properties of the catalysts andthe effect of oxygen mobility of the support on the catalyst activity. More recentstudies include in-situ X-ray absorption fine structure spectroscopy (XAFS) and insitudiffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) to study thestate of active cobalt species and formation of surface intermediates. Computationalsimulation studies will also be discussed to derive mechanistic models of steamreforming of oxygenated hydrocarbons, over Co-based catalysts.References:[1]. H. Song, L. Zhang, R.B. Watson, D. Braden, U.S. Ozkan, Catalysis Today 129 (2007) 346–354.[2]. H. Song, L. Zhang, U.S. Ozkan, Green Chemistry 9 (2007) 686–694.[3]. H. Song, U.S. Ozkan, Journal of Catalysis 261 (2009) 66-74.[4]. H. Song, B. Tan, U.S. Ozkan, Catalysis Letters, 132 (2009) 422-429.[5]. H. Song and U.S. Ozkan, Journal of Physical Chemistry. doi: 10.1021/jp905608e.[6]. H.Song and U.S. OzkanJ. Molecular Catalysis, doi: 10.1016/j.molcata.2009.11.003.76