Effect of surfacearea and porosity of carbonsupportsonthe Co catalyzed Fischer-Tropschreaction

A.A. GARCÍA BLANCO; G. LENER; T. RIBEIRO-SANTOS; O. FURLONG; K. SAPAG; M. NAZZARRO; R. M. LAGO

Madrid

Simposio; CatalysisforCleanEnergy and SustainableChemistry, CCESC2016; 2016

The Fischer-Tropsch synthesis (FTS) is a process of importance for the production of synthetic fuels and petrochemicals from Synthesis gas (syngas). As a consequence, it is a crucial step in the development of XTL technologies(gas-to-liquids, coal-to-liquids and biomass-to-liquids). The physicochemical properties of catalysts are crucial in their activity and selectivity. Among the factors which influence those properties, the support provides a high surfacearea that increases the active phase dispersion; its porosity might affect the transport of reactants and products; and the presence of the active phase within nanometric pores might affect the activity and selectivity of thereaction due to confinement effects. Because of the above mentioned factors, we selected carbon materials with differences in their pore size and surface area, in order to compare the effect of those properties in the catalyticbehavior of supported Co catalysts for the FTS. The materials selected were: an activated carbon (microporous), CMK-3 (ordered mesoporous material, with some microporosity), MWNT (non-porous), and treated MWNT (T-MWNT,the treatment opens the MWNT creating pores inside the nanotubes, mainly mesopores). The materials were characterized by TEM, XRD, XPS, TPD and N2 adsorption at 77 K. Catalytic tests were performedat 2,0 MPa and 230°C. Results obtained showed differences in the activity and selectivity of the catalysts, influenced by the textural properties of the support.