Synthesis of supported mesoporous catalysts using supercritical CO2

ASPROMONTE, SOLEDAD; PIOVANO, FEDERICO; ALONSO, ESTHER; BOIX, ALICIA V.

Microporous and Mesoporous Materials

IntechOpen 10 Lower Thames Street, London, EC3R 6AF, UK

Lugar: Londres; Año: 2020;

Metal and metal oxide nanoparticles have attracted increased attention due totheir unusual physical and chemical properties. The nature, dispersion and size of the nanoparticles are key factors in determining the activity and selectivity of the supported catalysts. Supercritical Fluid Deposition (SCFD) is a promising method to deposit metallic nanoparticles and films on inorganic porous supports. CO2 is the most commonly used supercritical fluid (sc-CO2) for material synthesis because it is non-toxic, non-reactive, nonflammable and inexpensive. This work presents the synthesis of cobalt, niquel and ruthenium nanoparticles on MCM-41, Al-MCM-41, MCM-48 and activated carbon supports in scCO2. Batch and continuous deposition are studied, with two high pressure reactor configurations: column or alternative (sandwich). The prepared samples were characterized by Scanning Electron(SEM/EDX) and Transmission Electron Microscopy (TEM).