Study on physicochemical properties of U3+ in LiCl-KCl eutectic media at 773 K

被引：13

作者：

Kim, Tack-Jin ^{[1
]}

Jung, Yongju ^{[2
]}

Shim, Joon-Bo ^{[1
]}

Kim, Si-Hyung ^{[1
]}

Paek, Seungwoo ^{[1
]}

Kim, Kwang-Rak ^{[1
]}

Ahn, Do-Hee ^{[1
]}

Lee, Hansoo ^{[1
]}

机构：

[1] Korea Atom Energy Res Inst, Taejon 305353, South Korea

[2] Korea Univ Technol & Educ, Dept Appl Chem Engn, Cheonan 330780, South Korea

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2011年 / 287卷 / 01期

关键词：

U3+; Uranium ions; LiCl-KCl; Pyroprocessing; Molten salt; Molar absorptivity; Formal potential; MOLTEN NACL-2CSCL; REDOX EQUILIBRIUM; URANIUM; CHLORIDE; IONS;

D O I：

10.1007/s10967-010-0689-z

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In order to enhance the efficiency of pyrochemical technology, especially electrorefining process, physicochemical data of trivalent uranium in LiCl-KCl eutectic at 773 K were measured, including molar absorptivity, formal potential and diffusion coefficient of U3+ ions. The molar absorptivities of U3+ were determined to be 765 +/- 48 and 686 +/- 39 M-1 cm(-1) at 465 and 550 nm, respectively. The formal potential of U3+/U4+ redox couple and diffusion coefficient of U3+ ions were measured to be -0.308 V vs. Ag/Ag+ and 8.7 x 10(-6) M-1 cm(-1), respectively. To elucidate the chemical behavior of U3+ ions under the existence of oxide ions, U3+ ions were reacted with oxides ions in situ produced at the LiCl-KCl media. Surprisingly, it was revealed from XRD patterns that UO2 was formed from the reaction between U3+ ions and O2- ions with the molar ratio of 1:1.

引用

页码：347 / 350

页数：4

共 14 条

[11] Electrolytic reduction of spent oxide fuel in a molten LiCl-Li2O system [J].

Park, B. H. ;

Park, S. B. ;

Jeong, S. M. ;

Seo, C. -S. ;

Park, S. -W. .

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2006, 270 (03) :575-583

[12] Electrochemical studies on the redox mechanism of uranium chloride in molten LiCl-KCl eutectic [J].

Reddy, BP ;

Vandarkuzhali, S ;

Subramanian, T ;

Venkatesh, P .

ELECTROCHIMICA ACTA, 2004, 49 (15) :2471-2478

[13] Electrochemical behavior of actinide ions in LiCI-KCl eutectic melts [J].

Shirai, O ;

Iwai, T ;

Suzuki, Y ;

Sakamura, Y ;

Tanaka, H .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 271 :685-688

[14]

SUZUKI S, 1971, J JPN I MET, V35, P589

← 1 2 →