Low-temperature catalytic performance for oxidative dehydrogenation of propane on nanosized Ti(Zr)-Ni-O prepared by modified sol-gel method

摘要

Nanosized Ti(Zr)-Ni-O prepared by modified sol-gel method exhibited good low-temperature catalytic performance:11.5% yield with 48% selectivity towards propene and 10.3% yield are obtained on Ti-Ni-O and Zr-Ni-O,respectively,at 275 deg C for oxidative dehydrogenation of propane to propene.SEM and XRD results indicated that the Ti(Zr)-Ni-O nanoparticles were well-distributed and of typical diameter ca.7 nm.The lattice parameters of the obtained nanostructured Ti(Zr)-Ni-O catalysts increased distinctly and there were stronger interaction between TiO_2/ZrO_2 and NiO.The interaction effectively restrains the deep oxidation of propane and leads to the increasing propene selectivity.