(492g) Experiments and Modelling On Preparation of Supported Porous Catalysts

The microstructure of porous supports used in heterogeneous catalysis determines key transport properties.The porous microstructure of the support can be influenced by the conditions of its preparation.The morphological features of the porous structure has to be related both to its preparation conditions and the final transport properties and catalyst performance.In our recent work a methodology for the calculation of the overall reaction rate from detailed simulations of reaction and transport processes in a porous catalyst structure has been demonstrated (1-4). Both computer generated and exprimental microtomography data have been used (5).The influence of the drying step on the final catalyst properties by experiments and detailed pore-scale modelling will be described in this presentation. The system under consideration is a mesoporous support (silica and silica-alumina) impregnated with a metal catalyst (Ni,Pt).The catalyst preparation step consists of impregnation of the support with a solution of the metal precursor followed by drying whereby micro-crystals of the precursor are deposited in the pores. 1)Kosek,J.,Stepanek,F.,Marek,M.,2005.Modelling of transport and transformation processes in porous and multiphase bodies.Adv.Chem.Eng.30,137 2)Koci,P.,Stepanek,F.,Kubicek,M.,Marek,M.,2006.Meso-scale modelling of CO oxidation in digitally reconstructured porous Pt/alumina catalyst.Chem.Eng.Sci.61,3240 3)Koci,P.,Stepanek,F.,Marek,M.,2007.Pore-scale modelling of nonisothermal reaction phenomena in digitally reconstructed porous catalyst.Mol.Simul.33,369 4)Koci,P.,Novak,V.,Stepanek,F.,Marek,M.,Kubicek,M.,2010.Multi-scale modelling of reaction and transport processes in porous catalyst,Chem.Eng.Sci.65,412 5)Novak,V.,Stepanek,F.,Koci,P.,Marek,M.,Kubicek,M.,2010.Chem.Eng.Sci.2352