DSC Study on the Reaction of Triuranium Octoxide with Hexachloropropene

概要

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It was known that hexachloropropene (HCP) reacted exothermically with U3O8 and produced UCl5·TCAC (TCAC=trichloroacrylyl chloride), UCl6·HCP and UCl4. The peak areas of DSC curves for the reaction were proportional to the amount of U3O8, and they were not practically affected by the time of soaking of U3O8 in HCP, but affected by the specific surface areas of U3O8 and the heat-treatments of UO3. As the specific surface areas of U3O8 decreased, the peak areas of the DSC curves were constant, but the initial temperature (Ti) of the reaction moved to high one and the shapes of the DSC curve became broader. These effect given by the specific surface areas involved also the heat-treatment of UO3, since specific surface areas influenced greatly by the temperature of the heat-treatment. Difference of crystal structure of starting UO3 affected the Ti, that is, the lowest Ti temperature obtained for the U3O8 prepared from amorphous UO3. The overall heat of the reaction was estimated to be 569kJ for one mole of U3O8.
日本熱測定学会の論文