Platinum supported on graphene - PTFE as catalysts for isotopic exchange in a detritiation plant

摘要

The catalytic separation of hydrogen isotopes is of particular interest for nuclear industry from the point of view of tritium recovery and its use in fusion reactors. Isotopic exchange may take place in the homogeneous (gaseous) phase or in the heterogeneous phase (hydrogen or gaseous deuterium and water or liquid heavy water). Catalysts are necessary both for the homogeneous phase reaction and the heterogeneous reaction.Recently, graphene and graphene oxides have been investigated as support material due to their excellent physical and chemical properties. The high specific surface, their thermal and chemical stability, high mechanical strength make graphene a potential component in the development of new catalysts that could be used in isotopic exchange. The use of graphene and graphene oxides as support for the active metal has shown an improvement in catalytic activity when compared to the conventional support, degasolination carbon. This behavior may be explained by the high dispersion of active metal on the surface of graphene.The paper presents the preparation of the catalysts that will be used in the future catalytic isotopic exchange experiments (first vapor phase catalytic exchange - VPCE column in order to understand its efficiency in isotopic exchange then the catalysts will be integrated into a liquid phase catalytic exchange LPCE - type laboratory installation and results of BET, SEM and XRD analysis for the prepared powder Pt/graphene oxide and commercial Pt/C in order to highlight the characteristics of the new material. It also shows TGA results for Pt/graphene oxide/PTFE in order to compare the thermal stability of the new prepared catalyst with the previous one.