Supported manganese oxide catalysts were prepared by the impregnation of alumina foam blocks washcoated with alumina and silica. The manganese content based on the weight of the washcoats was 10 wt % calculated as MnO2. Fourier transform profiles of the Mn K-edge EXAFS spectra for these samples gave three distinctive peaks at 0.15, 0.25, and 0.32 nm and were close to the profiles of Mn3O4 and b...

This study was aimed at defining the role of active phases in supported LiCl and LiCl–DyCl3 catalysts in the catalytic oxidative dehydrogenation (ODH) of n-butane. LiCl supported on silica displayed the highest activity and selectivity in n-butane ODH compared with other alkali metal halides. Addition of DyCl3 increased the activity. TPO, XRD and Raman light scattering (RLS) data showed that Li...

Supported silver catalysts with small and uniform particle sizes are promising for selective hydrogenation or oxidation reactions. However, during catalyst preparation, transport of the precursors often leads to large particles, especially at higher loadings. In this paper, use silicate as an intermediate preparation silica-supported nanoparticles is reported. was prepared by reacting nitrate s...

there are no appreciable amounts of nickel resources in iran; therefore, secondary resources of this element are to be more considered in future. spent nickel catalysts that are used in various industrial processes are one of them. for example nickel catalyst that is used in hydrogenation of edible oil have large amounts of nickel and they are generally supported on porous materials like silica...

Introduction One-pot oxidation reaction consisted of direct synthesis of hydrogen peroxide (H2O2) from H2 and O2 gases and oxidation reaction using in situ generated H2O2 is promising synthetic method, because it is possible to use the unstable H2O2 immediately without isolation/purification steps, which would contribute to energy and time saving as well as avoid the risk of transportation of t...