OP-II-3

PP-II-17whiskers, which assure an appropriate morphology to anchor the catalytic coating onit. Catalysts of Ni-Co/SBA-15 and Ni-Co/SBA-15K with 15 wt.% Ni and 10 wt.% Cowere prepared by the incipient wetness technique [1], simultaneously adding suitableamounts of an aqueous solution of Ni and Co hexahydrated nitrates (99.9%) to theSBA-15 mesoporous silica (fresh and previously modified with K) [2]. By using of acentrifugal ball mill, grinding parameters were optimized in order to reach anappropriated particle size for the preparation of stable slurries. The catalyst slurrieswere prepared by optimization of some variables, such as: catalyst particle size (D p ),solids content, and binder content (Nyacol® and Disperal® suspensions) [3].Viscosity and pH of the slurries were measured. Coating deposition step wasoptimized by controlling others experimental variables, such as: immersion time,dipping and withdrawing speed, centrifugation velocity to eliminate the excess ofslurry, dry and calcination temperatures of the coated samples and the use of primer.The quality of catalyst coatings was evaluated in terms of loading, homogeneity andadhesion force. The adherence of coating was evaluated in terms of weight loss afterexposure to ultrasonic treatment.Details about the preparation method of these kind of catalytic devices areshowed therein. Also are included relevant reactivity results obtained by using ofstructured catalysts in the total oxidation of acetone, catalytic autothermal reforming(ATR) of iso-octane and thermo-catalytic decomposition of methane (DTC).Fig. 1. Devices used for the preparation of structures catalysts.KATAPAK-M® packing Fecralloy® monoliths ULTRAMET® SiC FoamsNon-washcoated and washcoatedAl2O 3 FoamsReferences[1]. G. Leofanti, M. Padovan, G.Tozzola, B. Venturelli, Catal. Today 41 (1998) 207.[2]. K. Flodström, V. Alfredsson, Microp. Mesop. Mater. 59(2003) 167.[3]. S. Zhao, J. Zhang, D. Weng, X. Wu, Surf. Coat. Technol. 167 (2003) 97.363