Co-oxidation of some rare-earth chlorides in chloride melts

Conference · Sun Jul 01 04:00:00 EDT 2007

OSTI ID:20979712

Cho, Yung Zun; yang, Hee Chul; Kim, Eung Ho; Park, Hwan Seo; Kim, In Tae ^[1]; Eun, Hee Chul ^[2]

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1. Advanced Fuel Cycle Development, KAERI, Dukjin-Dong, Yuseong, DaeJeon 305-353 (Korea, Republic of)
2. Quantum Energy Chemical Engineering, UST, Yuseong-gu, Daejeon 305-333 (Korea, Republic of)

Co-oxidation of four rare earth chlorides (Ce/Pr/Nd/EuCl{sub 3}) in a LiCl-KCl eutectic molten salt has been carried out by using the oxygen sparging method. In this study, regardless of the oxygen sparging time (max. 420 min) and the eutectic molten salt temperature (400- 650 deg. C), oxychlorides(NdOCl, PrOCl) and oxides(CeO{sub 2}, Eu{sub 2}O{sub 3}, PrO{sub 2}) are formed as a precipitant by a reaction with oxygen. The conversion ratio of the rare earth elements to the insoluble precipitates increases with the sparging time and the molten salt temperature. In the conditions of 650 deg. C of a molten salt temperature and 420 min of a sparging time, the values of the conversion ratios of the used rare earth chlorides were over 0.999. The oxygen sparging method is effective for a precipitation of rare earth chlorides in eutectic molten salts without changing the eutectic composition of the salts and there is no formation of byproducts. (authors)

• Research Organization: American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 20979712
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
CERIUM CHLORIDES
CERIUM OXIDES
CONVERSION RATIO
EUROPIUM CHLORIDES
EUROPIUM OXIDES
EUTECTICS
LITHIUM CHLORIDES
MOLTEN SALTS
NEODYMIUM CHLORIDES
OXIDATION
OXYCHLORIDES
POTASSIUM CHLORIDES
PRASEODYMIUM CHLORIDES
PRASEODYMIUM OXIDES
PRECIPITATION
TEMPERATURE RANGE 0400-1000 K