Process for preparing a spherical material with a hierarchical porosity comprising metallic particles trapped in a mesostructured matrix

摘要

A process is described for the preparation of an inorganic material with a hierarchical porosity in the micropore and mesopore domains. The material has at least two elementary spherical particles having a maximum diameter of 200 microns. The process comprises:a) preparing a solution containing zeolitic nanocrystals with a maximum nanometric dimension equal to 60 nm based on silicon and/or precursor elements of proto-zeolitic entities based on silicon;b) mixing, in solution, metallic particles or at least one metallic precursor of metallic particles, a surfactant and the solution obtained in accordance with a) such that the ratio of the volumes of inorganic and organic materials, V_inorganic/V_organic, is 0.29 to 0.50;c) aerosol atomization of the solution obtained in b) resulting in formation of spherical particles;d) drying the particles;g) eliminating any remaining precursor elements of proto-zeolitic entities based on silicon and the surfactant.