한국방사성폐기물학회:학술대회논문집 (Proceedings of the Korean Radioactive Waste Society Conference)

한국방사성폐기물학회 (Korean Radioactive Waste Society)
권호 표지

Sulfurization of Rare-Earth Oxides Using $H_2S$ and $SC_2$

  • Sato, Nobuaki (Green Nuclear Research Laboratory, Kyung Hee University) ;
  • Sato, Soichi (Innovative Research Promotion Office, Japan Nuclear Cycle Development Institute)
  • 발행 : 2004.02.01
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초록

Sulfurization of rare-earth oxides R203 (R=Nd, Eu) using sulfurizing reagents, such as $H_2S$ and $SC_2$was examined for the sulfide magnetic separation of spent fuel. $EU_2O_3$was found to react with H$_3$S gas forming the mixture of $EU_2O_2S$ and EuS at 500 oC, while EuS was formed by $SC_2$ at 800 oC. In the case of the mixture of $R_2O_3$and $UO_2$, EuS and $ND_3S_4$ were formed as well as $EU_2O_2S$ and $Nd_2O_2S$ at 500oC in $H_2S$, though $UO_2$ remained unreacted.

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