Preparation of NiNbO/AISI-430 Ferritic Stainless Steel Monoliths for Catalytic Applications

J. SANTANDER; E. LÓPEZ; G. TONETTO; M. PEDERNERA

INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH

AMER CHEMICAL SOC

Lugar: Washington; Año: 2014 vol. 53 p. 11312 - 11319

0888-5885

ABSTRACT: AISI 430 ferritic stainless steel was used as substrate to make catalytic monolithic structures. In order to increase the surface roughness of the substrate, the steel was oxidized at a temperature range of 900-940 °C and in a time range of 30-120 min. The oxide layer formed was characterized. Treatments at 940 °C for 60 min were found optimum to obtain a Cr-rich rough oxide layer, with good adherence and homogeneity. Catalytic monoliths were prepared by dip-coating into four different slurries containing the NiNb mixed oxide catalyst. The samples were characterized and tested in the oxidative dehydrogenation (ODH) of ethane to ethylene. The structured catalysts were active for the ODH of ethane, with very good selectivity to ethylene. The catalytic performance was remarkably constant for 170 h in stream at 400 °C.