Viscosities of Molten Alkali Carbonates.

Sato, Yuzuru; Yaegashi, Seiji; Kijima, Takashi; Takeuchi, Eiji; Tamai, Kyoko; Hasebe, Masayuki; Hoshi, Michio; Yamamura, Tsutomu

doi:10.2963/jjtp.13.156

Cited by 15 publications

(33 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The broken line represents the viscosity at the liquidus temperature for each composition, which was calculated from the phase diagrams and the equation, log © = (¹0.9506 ¹ 0.5205X K + 0.7388X K 2 ) + (1820 ¹ 9.04X K ¹ 402.2X K 2 )/T, where © is the viscosity of binary eutectic xLi 2 CO 3 1-xK 2 CO 3 molten salts, and X K is the molar fraction of K 2 CO 3 salt. 20), 21) The isothermal viscosities of binary eutectic xLi 2 CO 3 1-xK 2 CO 3 molten salts clearly show downward convex curves at all temperatures. The viscosities of binary eutectic xLi 2 CO 3 1-xK 2 CO 3 molten salts show a clear dependence on the melting temperature of each composition.…”

Section: Resultsmentioning

confidence: 94%

“…In addition, the oscillation method requires long analysis times, approximately 48 h, to obtain an accurate measurement of molten salt viscosity. 20), 21) The oscillation method also requires accurate information about the molten salt density, indicating that this method is unsuitable for measuring the viscosity of complicated mixed molten salts above quaternary eutectic system.…”

Section: )16)mentioning

confidence: 99%

“…The viscosity of Li 2 CO 3 molten salt monotonically decreases with increasing temperature consistent with other reports of molten carbonate salts. 20)22) The viscosity of Li 2 CO 3 molten salt measured at 1023 K is 7.1 mPa·s. Although these results are slightly different than those reported by Janz's research group, they are similar to results reported by Sato's group.…”

Section: Viscosity Analysismentioning

confidence: 99%

See 2 more Smart Citations

Viscosity analysis of alkali metal carbonate molten salts at high temperature

Kim

Uematsu

Toda

et al. 2015

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

The viscosities of unary, binary, and ternary eutectic alkali metal carbonate molten salts were measured for the first time by a rotation method using a high-temperature rheometer system and the reliability of the viscosity values was evaluated. The viscosity values obtained in this study are similar to that reported by Sato's research group, which is considered to have the highest reliability among the studies reported till date. The standard errors in the viscosity values at each temperature are less than «5%.

show abstract

Section: Resultsmentioning

confidence: 94%

Section: )16)mentioning

confidence: 99%

Section: Viscosity Analysismentioning

confidence: 99%

See 1 more Smart Citation

Viscosity analysis of alkali metal carbonate molten salts at high temperature

Kim

Uematsu

Toda

et al. 2015

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

show abstract

“…Notwithstanding their great importance, knowledge of the physical properties of these melts is still far from complete, with many of the available results being inconsistent having been apparently compromised by experimental complications. Janz andSaegusa (1963), Vorob'ev et al (1966), and Sato et al (1999) have investigated the viscosity of lithium, sodium, and potassium carbonate melts at/or near ambient pressure. Sato et al (1999) The measurements were carried out between 298 and 373 K, while the numbers in the figure show the employed strain rate (s -1 ) during the measurements.…”

Section: Instrument Calibrationmentioning

confidence: 99%

“…Janz andSaegusa (1963), Vorob'ev et al (1966), and Sato et al (1999) have investigated the viscosity of lithium, sodium, and potassium carbonate melts at/or near ambient pressure. Sato et al (1999) The measurements were carried out between 298 and 373 K, while the numbers in the figure show the employed strain rate (s -1 ) during the measurements.…”

Section: Instrument Calibrationmentioning

confidence: 99%

An advanced rotational rheometer system for extremely fluid liquids up to 1273 K and applications to alkali carbonate meltsk

Genova

Cimarelli

Hess

et al. 2016

American Mineralogist

View full text Add to dashboard Cite

A high-temperature rheometer equipped with a graphite furnace, characterized by an air-bearingsupported synchronous motor, has been enhanced by a custom-made Pt-Au concentric cylinder assembly. With this adaptation, viscosity measurements of highly fluid melts can be achieved at high temperatures, up to 1273 K.Due to the air-bearing-supported motor, this apparatus can perform measurements of extremely low torque ranging between 0.01 μNm and 230 mNm (resolution of 0.1 nNm), extending the typical range of viscosity measurements accessible in the present configuration to 10 -3.5 -10 3.5 Pa·s and shear rates up to 10 2 of s -1 .We calibrated the system with distilled water, silicone oils, and the DGG-1 standard glass. We further present new data for the viscosity of Na 2 CO 3 , K 2 CO 3 , and Li 2 CO 3 liquids. Finally, a comparison between our results and literature data is provided, to illustrate the effect of chemical composition and oxygen fugacity on the viscosity of alkali carbonate melts, which serve as analogs for both carbonatitic melts and molten carbonates of industrial relevance.This study substantially improves the database of alkali carbonate melts and dramatically increases the accuracy with respect to previous measurement attempts. The very low viscosity range data and their temperature dependence also helps to constrain very well the activation energy of these highly fluid systems and confirms the estimate of a universal pre-exponential factor for non-Arrhenian viscosity-temperature relationships.

show abstract

Retracted: The Effect of Air on the Oxidation Decomposition of Cationic Exchange Resins in a Ternary Li₂CO₃−Na₂CO₃−K₂CO₃ Molten‐Salt System

et al. 2023

View full text Add to dashboard Cite

The molten-salt oxidation method (MSO) can be applied for disposal of spent cationic exchange resins (CERs) after the treatment of nuclear industry wastewater. In this work, the oxidation decomposition of resins in carbonate molten salt in N 2 and air atmospheres was investigated. The SEM morphology and FTIR spectrograms indicated that the addition of air obviously prompted the oxidation decomposition of the benzene ring, SÀ O bond and SÀ C bond in residues and the decomposition efficiency of resins reached 98.69 % at 800 °C. The XPS analysis showed the conversion of sulfur species in residues. The peroxide and superoxide ions in carbonate molten salt prompted the decomposition of thiophene sulfur and resulted in the formation of sulfate. The retention rate of sulfur in spent salt was 84.36 % at 800 °C. This work provided more theoretical guidance for the treatment of resins and technical support for the sustainable development of nuclear industry.

show abstract

Viscosities of Molten Alkali Carbonates.

Cited by 15 publications

References 7 publications

Viscosity analysis of alkali metal carbonate molten salts at high temperature

Viscosity analysis of alkali metal carbonate molten salts at high temperature

An advanced rotational rheometer system for extremely fluid liquids up to 1273 K and applications to alkali carbonate meltsk

Retracted: The Effect of Air on the Oxidation Decomposition of Cationic Exchange Resins in a Ternary Li₂CO₃−Na₂CO₃−K₂CO₃ Molten‐Salt System

Contact Info

Product

Resources

About

Viscosities of Molten Alkali Carbonates.

Cited by 15 publications

References 7 publications

Viscosity analysis of alkali metal carbonate molten salts at high temperature

Viscosity analysis of alkali metal carbonate molten salts at high temperature

An advanced rotational rheometer system for extremely fluid liquids up to 1273 K and applications to alkali carbonate meltsk

Retracted: The Effect of Air on the Oxidation Decomposition of Cationic Exchange Resins in a Ternary Li2CO3−Na2CO3−K2CO3 Molten‐Salt System

Contact Info

Product

Resources

About

Retracted: The Effect of Air on the Oxidation Decomposition of Cationic Exchange Resins in a Ternary Li₂CO₃−Na₂CO₃−K₂CO₃ Molten‐Salt System