Graphite oxidation in sodium carbonate/sodium sulfate melts

Autor:	D. Stelman, Gary B. Dunks, S. J. Yosim
Rok vydání:	1982
Předmět:	Sodium Inorganic chemistry chemistry.chemical_element Chemical reaction Inorganic Chemistry Chemical kinetics chemistry.chemical_compound chemistry Reagent Sodium sulfate Oxidizing agent Limiting oxygen concentration Physical and Theoretical Chemistry Sodium carbonate
Zdroj:	Inorganic Chemistry. 21:108-114
ISSN:	1520-510X 0020-1669
Popis:	The oxidation of spectroscopic grade graphite in sodium carbonate/sodium sulfate melts using oxidizing (air and oxygen) or inert (argon and nitrogen) sparge was investigated between 900 and 1000/sup 0/C. The oxidation rate increased with increasing graphite surface area, increasing melt temperature, and increasing oxygen concentration. The rate, in oxidizing atmospheres, at 900/sup 0/C was faster in pure sodium carbonate than in pure sodium sulfate with the maximum rate observed in mixed melts. At 950/sup 0/C the oxidation rate was virtually equal in the two pure melts, and at 982/sup 0/C the rate was faster in pure sodium sulfate. In melts containing sodium sulfate, the rate-determining step was apparently the same for reactions conducted in oxidizing and inert atmospheres, with sodium sulfate acting as a catalyst in the former and a reagent in the latter. Sequences of reactions are proposed for the oxidation of graphite in pure sodium carbonate, pure sodium sulfate, and mixed melts.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7170d91837c05ebea433177f0591a84c https://doi.org/10.1021/ic00131a021 Zobrazit plný text záznamu