The precipitation reaction of some rare earth chlorides (La/Ce/Nd/GdCl 3 ) in a LiCl-KCl molten salt has been carried out by using the oxygen sparging method. In this study, regardless of the oxygen sparging time and the molten salt temperature, oxychlorides (REOCl) for LaCl 3 , NdCl 3 and GdCl 3 , and an oxide (REO 2 ) for CeCl 3 are formed as a precipitate. The conversion of rare-earth chlorides into insoluble precipitates was described by using a conversion ratio. The conversion ratio increased exponentially with the oxygen sparging time and finally showed asymptotic value at 1,023 K of the molten salt temperature condition. The conversion ratios of LaCl 3 , NdCl 3 and GdCl 3 were increased with the molten salt temperature, however, even though the conversion ratio was increased from 0.660 to 0.995 with increasing molten salt temperature from 823 to 923 K at 60 min of a sparging time, the values of the conversion ratio of CeCl 3 were nearly constant (over 0.999) with the molten salt temperature. As a result of the thermogravimetric analysis of the precipitates (oxychlorides), about 11-13% of a weight loss happened in the case of LaOCl, NdOCl and GdOCl, and all the oxychlorides were converted to their oxides i.e. La 2 O 3 , Nd 2 O 3 and Gd 2 O 3 at a high temperature and oxygen atmosphere.
Halogenated plastics such as PVC pipe, PTFE tube, and latex gloves were test‐burned in a bench‐scale molten salt oxidation reactor. Hydrogen halides (HCl and HF) and free halogens (Cl2 and F2) first released by the thermal decomposition of halogenated plastics (PVC and PTFE) were nearly completely collected in the hot sodium carbonate salt bath. Compared to halogen collection, sulfur collection was not complete and SO2 emission for rubber gloves decreased with stoichiometric air ratio. The entrainment of spiked metals and their fraction in the sub‐micron particle size range increased with the chlorine content as well as the operating temperature.
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