Electrochemical studies of molten sodium carbonate
Journal Article
·
· Inorg. Chem.; (United States)
Electrochemical studies of sparged beds of sodium carbonate at 900/sup 0/C employing mixtures of oxygen, carbon dioxide, and water vapor were conducted to determine the identities and relative concentrations of melt species. Analysis of experimental current-potential curves was done by fitting the curves with composite curves that consisted of the algebraic sum of eight computer-generated theoretical waves. The most prominent features of the curves were the 1-electron reversible couple O/sub 2//sup -//O/sub 2//sup 2 -/ superimposed on a 2-electron reversible couple proposed to be CO/sub 4//sup 2 -//CO/sub 3//sup 2 -/, O/sup 2 -/ and, at higher overpotential, a 2-electron irreversible wave proposed to be the reduction of C/sub 2/O/sub 6//sup 2 -/ion. ESR spectra confirmed the presence of superoxide ion in frozen-melt matrix. Under sparged conditions, the thermal decomposition of sodium carbonate appears to produce peroxide ion in addition to oxide ion. A sequence of reactions is proposed to account for the interconversion of melt species.
- Research Organization:
- Rockwell International Corp., Canoga Park, CA
- DOE Contract Number:
- AT03-76ER70030
- OSTI ID:
- 5862316
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 22:15; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKALI METAL COMPOUNDS
CARBON
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
COMPUTER CALCULATIONS
DATA
DATA ANALYSIS
DECOMPOSITION
DISPERSIONS
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELEMENTAL MINERALS
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
GRAPHITE
INFORMATION
KINETICS
MINERALS
MIXTURES
NITROGEN
NONMETALS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
REACTION INTERMEDIATES
REACTION KINETICS
SODIUM CARBONATES
SODIUM COMPOUNDS
TEMPERATURE DEPENDENCE
THEORETICAL DATA
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
VAPORS
VERY HIGH TEMPERATURE
WATER VAPOR
400400* -- Electrochemistry
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKALI METAL COMPOUNDS
CARBON
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
COMPUTER CALCULATIONS
DATA
DATA ANALYSIS
DECOMPOSITION
DISPERSIONS
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELEMENTAL MINERALS
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
GRAPHITE
INFORMATION
KINETICS
MINERALS
MIXTURES
NITROGEN
NONMETALS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
REACTION INTERMEDIATES
REACTION KINETICS
SODIUM CARBONATES
SODIUM COMPOUNDS
TEMPERATURE DEPENDENCE
THEORETICAL DATA
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
VAPORS
VERY HIGH TEMPERATURE
WATER VAPOR