The decomposition of simple organic chlorides (carbon tetrachloride, CCl 4 and mono-chlorobenzen, C 6 H 5 Cl) as the imitation substances of polychlorobiphenyls (PCBs) were investigated by using basic molten salts with a low melting point and oxidizing ability in order to establish a safe, simple and highly efficient decomposition process. CCl 4 or C 6 H 5 Cl was injected together with an inert carrier gas (Ar) into basic molten salts (KOH-K 2 CO 3 ) at 673-983 K, and the residual concentration in the exhaust was measured. The decomposition efficiency of CCl 4 strongly depended on the reaction temperature and the immersion depth of gas injection nozzle (related to the residence time of CCl 4 bubble in the molten salts). The decomposition efficiency reached to very high of 99.9% with KOH-20 mol% K 2 CO 3 at 973 K. On the other hand, the decomposition efficiency of C 6 H 5 Cl was not so high (97%) in the inert atmosphere condition applied in this study.
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