Stuctural and surface characterisation of activated carbons through multitechnical tools

Orateur : A. LAZZARINI (Department of Chemistry, NIS Centre and INSTM, University of Turin, Via Giuria 7, I-10125, Turin, Italy)

Because of their industrial relevance in catalysis, activated carbons are deeply investigated materials, both in terms of structural and surface properties. Due to their intrinsic complexity, no single technique is able to give a complete picture of the overall properties. In this work we propose a multi-technique approach to fully characterize two carbons of wood origin, activated either by steam or by phosphoric acid, and the corresponding Pd/C catalysts. The two carbons and related Pd/C catalysts of industrial relevance have been characterized in terms of surface area and porosity (by N2 physisorption), morphology (by Scanning Electron Microscopy), structure (by Solid State Nuclear Magnetic Resonance, Raman spectroscopy and X-Ray Diffraction) and surface properties (by Diffuse Reflectance Infrared Spectroscopy and Inelastic Neutron Scattering). This multitechnical approach allowed us to fully understand how the activation procedure influences the morphology, the composition, the structure and the surface properties of activated carbons, both at a micro- and at the nanoscale. This is the preliminary and fundamental step to understand their role in catalysis.

Télécharger dans mon agenda