Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

CATALYTIC COMBUSTION OF WOOD CHIPS IN CONICALSPOUTED BEDMaría J. San José, Sonia Alvarez, Luis B. López, Iris GarcíaPP-51Departamento de Ingeniería Química. Universidad del País Vasco. Aptdo 644. 48080Bilbao. Tel. 34-946015362, Fax 34-946013500, e-mail: mariajose.sanjose@ehu.esSpouted bed technology is suitable for thermal treatment of wastes. In previouspapers, stable operating and non-segregation conditions of beds consisting of coarseparticles [1-3]. and of sawdust and mixtures of wood wastes [4] and of catalyst solids[5] and thermal treatment by combustion of biomass [6-7] and of cork wastes [8] havebeen studied in conical spouted beds.In this paper, a conical spouted bed combustor have been started up and tunedfor catalytic combustion of wood chips with Pd catalyst.The experimental unit designed at pilot plant scale basically consists of a blower,an electric resistance for preheating the air, a solid feeding system, thermocouples atseveral positions in the contactor and two high efficiencycyclones. The reactor utilized, at pilot plant scale, shown inthe Figure, cone angle, γ= 36º, is made of AISI-310S heatresistantstainless steel, thermally insulated.The solids used have been wood chips (d p = 25 mm, ρ s =540 kg/m 3 , Geldart group D) and Pd/Al 2 O 3 (d p = 0.11 mm, ρ s =378 kg/m 3 , Geldart group A).The performance of catalytic combustion of wood chips inthe new combustor has been run out and results prospectsan environmental improvement.References:[1]. Olazar, M., San José, M.J., Aguayo, A.T., Arandes, J.M. and Bilbao, J., 1992. Ind. Eng. Chem.Res. 31(7), 1784-92.[2]. Olazar, M., San José, M.J., Peñas, F.J., Aguayo, A.T. and Bilbao, J., 1993. Ind. Eng. Chem. Res.,32, 2826-2834.[3]. San José, M.J., Olazar, M., Peñas, F.J. and Bilbao, J., 1994. Ind. Eng. Chem. Res., 33, 1838-1844.[4]. Olazar, M., San José, M.J., LLamosas, R., and Bilbao, J., 1994. Ind. Eng. Chem. Res. 33, 993-1000.[5]. San José, M.J., Alvarez, S., Morales, A., Lopez, L.B., Ortiz de Salazar, A., 2009. Catal. Today,147, 162-169.[6]. San José, M.J., Alvarez, S., Aguado, R., Bilbao, J., 2002. Inf. Tecnol., 13(2), 127-131.[7]. San José, M.J., Álvarez, S., Ortiz de Salazar, A., Olazar, M., Bilbao, J. Science in Thermal andChemical Biomass Conversion, Bridgwater, A.V., Boocock, D.G.B., Eds. Newbury Berks, UK:CPL press. vol. 1, pp. 228-236(2006).[8]. San José, M.J., Alvarez, S., Ortiz de Salazar, A., Morales, A., Bilbao, J., 2006. Int. J. Chem.React. Eng., 4, A15, 1-7.141