Statistische Analyse von Festbettreaktorexperimenten für die Abschätzung von kinetischen Parametern

Abstract

nia and vanadia composition were thermally stable up to 450 C. For higher sinter temperatures the SSA decreased drastically by TiO 2 phase transformation and grain growth.Catalyst structure was controlled in situ during deposition through the pressure drop across the foam resulting in homogeneous to patchy V 2 O 5 /TiO 2 coatings. The produced foam catalysts needed no subsequent treatment like calcination as for common wet-made catalysts and could be installed in the reactor for the catalytic evaluation. The coated-foam catalyst revealed higher catalytic activity and similar selectivity to phthalic anhydride at high o-xylene conversion compared to a wet-made catalyst. The high vanadia distribution and its monomeric composition on the open foam structure facilitated vanadia accessibility. Directly coated foam catalysts combine high accessibility, high catalytic yield with favorable support structures (low pressure drop, enhanced heat transfer), and fast production routes, making them attractive for catalytic reactions.