A novel sensitive method for determining oxygen solubility in molten carbonates and carbonate-based melts: Reaction of oxidising species formed with uranium dioxide / Volkovich VA,Griffiths TR,Fray DJ,Fields M,Thied RC // . - 2000. - V. 99, l. 41. - P. 441-450.

ISSN/EISSN:

нет данных / нет данных

Type:

Proceedings Paper

Abstract:

A sensitive method for determining oxygen solubility in molten carbonates and carbonate-based melts has been developed. The method is based on the reaction of oxidising species (peroxide and superoxide formed upon dissolution of oxygen in carbonates) with an excess of uranium dioxide. The concentration of the alkali metal uranates(VI) formed can then accurately be determined without interference from unreacted UO2. Oxygen solubilities at temperatures from 450 to 800 degrees C were determined. The solubility of oxygen in a range of carbonate-chloride melts was also determined and found to increase with decreasing radius of the cation of the alkali metal chloride added. Measurements at various partial pressures of oxygen allowed the determination of the predominant oxygen species formed in the melt, and preliminary experiments showed that in the ternary carbonate melt at 450 degrees C oxygen dissolves forming mainly superoxide ions.

Author keywords:

ELECTRODE REACTION; AU-ELECTRODES; QUANTITATIVE-ANALYSIS; REDUCTION; KINETICS; LI2CO3-K2CO3; OXIDATION; MIXTURES; CURVES; UO2

DOI:

нет данных

Web of Science ID:

ISI:000087280700049

Соавторы в МНС:

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Другие поля

Поле	Значение
Editor	Trulove, PC and DeLong, HC and Stafford, GR and Deki, S
Booktitle	MOLTEN SALTS XII, PROCEEDINGS
Series	ELECTROCHEMICAL SOCIETY SERIES
Note	12th International Symposium on Molten Salts, HONOLULU, HI, OCT 17-22, 1999
Organization	Electrochem Soc, Div Phys Electrochem; Electrochem Soc, Div High Temp Mat; Electrochem Soc, Div Electrodeposit; USAF, Off Sci Res; European Off Aersp Res \& Dev
Publisher	ELECTROCHEMICAL SOCIETY INC
Address	65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
Language	English
ISBN	1-56677-264-8
Keywords-Plus	ELECTRODE REACTION; AU-ELECTRODES; QUANTITATIVE-ANALYSIS; REDUCTION; KINETICS; LI2CO3-K2CO3; OXIDATION; MIXTURES; CURVES; UO2
Research-Areas	Chemistry; Electrochemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Electrochemistry
ResearcherID-Numbers	Volkovich, Vladimir/K-8339-2012
ORCID-Numbers	Volkovich, Vladimir/0000-0003-4438-1194
Number-of-Cited-References	22
Usage-Count-Since-2013	2
Doc-Delivery-Number	BQ13W