• Title/Summary/Keyword: LiCl-KCl

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Ion Permeation of PVA/Gelatin Blend Membrane Prepared Under High Electric Field (고전장하에서 제조된 PVA/Gelatin 블렌드막의 이온투과 특성)

  • Huh, Yang-Il;Joe, Jeong-Woong
    • Polymer(Korea)
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    • v.30 no.6
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    • pp.568-571
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    • 2006
  • Poly(vinyl alcohol) (PVA)/gelatin(GEL) blend membranes were prepared under a high electric field, and their swelling and ion permeation behaviors were investigated. For alkali metal salts such as LiCl, NaCl and KCl, the permeability coefficients were increased until the electric field of 10 kV due to the decreased tortuosity, whereas they were decreased over 10 kV owing to the increase of the degree of crystallinity. The swelling ratios of the blend membranes showed the minimum values at pH 6, while the permeability coefficients exhibited the maximum values at the same condition. The minimum swelling ratios result from the repulsion effect between charged groups in acidic or basic regions, and the maximum permeabilities result from Donnan exclusion effect in the same regions. Especially, the per-meability coefficient for KCl of the membrane increased steeply to five times at $40^{\circ}C$ than below $35^{\circ}C$.

SEPARATION OF STRONTIUM AND CESIUM FROM TERNARY AND QUATERNARY LITHIUM CHLORIDE-POTASSIUM CHLORIDE SALTS VIA MELT CRYSTALLIZATION

  • WILLIAMS, AMMON N.;PACK, MICHAEL;PHONGIKAROON, SUPATHORN
    • Nuclear Engineering and Technology
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    • v.47 no.7
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    • pp.867-874
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    • 2015
  • Separation of cesium chloride (CsCl) and strontium chloride ($SrCl_2$) from the lithium chloride-potassium chloride (LiCl-KCl) salt was studied using a melt crystallization process similar to the reverse vertical Bridgeman growth technique. A ternary $SrCl_2-LiCl-KCl$ salt was explored at similar growth rates (1.8-5 mm/h) and compared with CsCl ternary results to identify similarities. Quaternary experiments were also conducted and compared with the ternary cases to identify trends and possible limitations to the separations process. In the ternary case, as much as 68% of the total salt could be recycled per batch process. In the quaternary experiments, separation of Cs and Sr was nearly identical at the slower rates; however, as the growth rate increased, $SrCl_2$ separated more easily than CsCl. The quaternary results show less separation and rate dependence than in both ternary cases. As an estimated result, only 51% of the total salt could be recycled per batch. Furthermore, two models have been explored to further understand the growth process and separation. A comparison of the experimental and modeling results reveals that the nonmixed model fits reasonably well with the ternary and quaternary data sets. A dimensional analysis was performed and a correlation was identified to semipredict the segregation coefficient.

Examination on Electrochemical Behaviors of Niobium Chloride in Molten LiCl-KCl by Cyclic Voltammetry

  • Jeong, Gwan Yoon;Park, Jaeyeong
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2018.11a
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    • pp.299-300
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    • 2018
  • Electrochemical behaviors of Nb ion in the $LiCl-KCl-NbCl_5$ molten salt were examined. Cyclic voltammograms with different scan rates and scan range at $450^{\circ}C$ showed possible electrochemical redox reactions which were identified by comparison to the literature data. Peak potentials for each redox reaction were consistent with the literature, but some redox reactions were not clearly defined due to the formation of subchloride compound in chloride salt. The electrochemical behaviors of Nb ion related to the subchloride formation as well as Nb metal deposition will be investigated for the future work.

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Electrochemical Behavior of Tm ion and Bi ion in LiCl-KCl Molten Salt

  • Kim, Beom-Kyu;Han, Hwa Jeong;Park, Ji Hye;Kim, Won Ki;Park, Byung Gi
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2017.10a
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    • pp.83-84
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    • 2017
  • This study, electrolytic behavior of Thulium and Tm-Bi ion system was studied. The electrochemical behavior of Tm was studied in $LiCl-KCl-TmCl_3$ molten salts using electrochemical techniques Cyclic Voltammetry on tungsten electrodes at 773K. During the process of CV and SWV, intermetallic compound were observed Bi-Tm. Further study, in order to determine clarity of diffusion coefficient in this experiment, we will compare result of electrochemistry method and we also need to quantitative research.

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Electric Conductance of Dilute Solutions of Alkali Chlorides in Acetone-Water and Formic Acid-Water Mixtures (아세톤-물 및 포름酸-물 混合溶媒中에서의 알칼리 鹽化物溶液의 電導度)

  • Byung-Rin Cho;Yong-Ja Lee;Kwang-Ho Kim
    • Journal of the Korean Chemical Society
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    • v.22 no.1
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    • pp.12-18
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    • 1978
  • The electric conductances of dilute solutions of alkali chlorides (LiCi, NaCl, KCl, RbCl, CsCl) in a series of acetone-water and formic acid-water mixtures were determined respectively at $^30{\circ}C$. The results of the conductances of alkali chlorides in acetone-water mixtures were analysed by the Debye-Huckel-Onsager equation and the variations of limiting equivalent conductances with the compositions of acetone-water mixtures were explained in terms of selective solvation of electrolytes. The conductances of dilute solutions of alkali chlorides in formic acid-water could not be analysed because of the strong ionic atmosphere of solvent itself.

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Effects of Particle Size and Binder Phase Addition on Formability of Li-Si Alloy Powder for Thermal Battery Anode (열전지 음극재용 Li-Si 원료의 성형성에 미치는 입자크기와 바인더첨가 효과)

  • Ryu, Sung-Soo;Kim, Hui-Sik;Kim, Seongwon;Kim, Hyung-Tae;Cheong, Hae-Won;Lee, Sung-Min
    • Journal of Powder Materials
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    • v.21 no.5
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    • pp.331-337
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    • 2014
  • The effects of particle size of Li-Si alloy and LiCl-KCl addition as a binder phase for raw material of anode were investigated on the formability of the thermal battery anode. The formability was evaluated with respect to filling density, tap density, compaction density, spring-back and compressive strength. With increasing particle size of Li-Si alloy powder, densities increased while spring-back and compressive strength decreased. Since the small spring-back is beneficial to avoiding breakage of pressed compacts, larger particles might be more suitable for anode forming. The increasing amount of LiCl-KCl binder phase contributed to reducing spring-back, improving the formability of anode powder too. The control of particle size also seems to be helpful to get double pressed pellets, which consisted of two layer of anode and electrolyte.