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Decomposition thermodynamics of magnesium sulfate / Madeleine N. Scheidema in Industrial & engineering chemistry research, Vol. 50 N° 16 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9550-9556 Titre : Decomposition thermodynamics of magnesium sulfate Type de document : texte imprimé Auteurs : Madeleine N. Scheidema, Auteur ; Pekka Taskinen, Auteur Année de publication : 2011 Article en page(s) : pp. 9550-9556 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermodynamics  Magnesium Résumé : The stability of MgSO4 was evaluated with varying conditions using HSC Chemistry software and thermo analysis (TG-DSC). The available thermodynamic data were reviewed and the equilibrium calculations using these data were compared to the results of the thermo analysis, in order to select the most reliable data. An enthalpy of formation for MgSO4 of −1284.9 kJ/mol was used in the calculations. Equilibrium calculations of magnesium sulfate in the absence of any reducing agent resulted in a decomposition temperature of 1080 °C. This temperature can be lowered in the presence of a reducing agent, which reduces the energy requirement. The calculations resulted in a decomposition temperature of 625 °C, 600 and 610 °C in the presence of sulfur, carbon monoxide and hydrogen gas as a reducing agent, respectively. The thermo analysis showed that magnesium sulfate decomposed at 1100 °C under N2 atmosphere; at 1070 °C in an atmosphere of 10% CO and 90% N2; and at 950 °C in an atmosphere with 5% H2 and 95% N2. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102554f [article] Decomposition thermodynamics of magnesium sulfate [texte imprimé] / Madeleine N. Scheidema, Auteur ; Pekka Taskinen, Auteur . - 2011 . - pp. 9550-9556. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9550-9556 Mots-clés : Thermodynamics  Magnesium Résumé : The stability of MgSO4 was evaluated with varying conditions using HSC Chemistry software and thermo analysis (TG-DSC). The available thermodynamic data were reviewed and the equilibrium calculations using these data were compared to the results of the thermo analysis, in order to select the most reliable data. An enthalpy of formation for MgSO4 of −1284.9 kJ/mol was used in the calculations. Equilibrium calculations of magnesium sulfate in the absence of any reducing agent resulted in a decomposition temperature of 1080 °C. This temperature can be lowered in the presence of a reducing agent, which reduces the energy requirement. The calculations resulted in a decomposition temperature of 625 °C, 600 and 610 °C in the presence of sulfur, carbon monoxide and hydrogen gas as a reducing agent, respectively. The thermo analysis showed that magnesium sulfate decomposed at 1100 °C under N2 atmosphere; at 1070 °C in an atmosphere of 10% CO and 90% N2; and at 950 °C in an atmosphere with 5% H2 and 95% N2. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102554f