Kinetics of the actinides-lanthanides separation: mass transfer between molten fluorides and liquid metal at high temperatures

摘要: Abstract Experimental studies on the extraction of actinides and other elements from a fluorinated salt into liquid metal phase containing reducing agent such as magnesium or aluminium have been performed using two different systems. The rate transfer is very rapid could, depending way stirring carried out, vary with rate. Three types tested observations are explained both in terms hydrodynamics chemistry. role interfacial agitation discussed assumption that limiting factor related to chemical reaction not mass confirmed by measured activation energy 180 kJ mol−1. Thermal effects observed magnitudes reduced species. Chemical control kinetics combined thermal account for transfer. These results can be used develop high-temperature process separating lanthanides. More work required determine mechanisms, which may limited interface.