Phase Relation and Thermodynamic Properties of NaCl-Na2CO3 System as a Basic System for Secondary Fly Ash in Incineration Processes of Municipal Wastes
Kokoro Iwasawa, Shu Yamaguchi, Masafumi Maeda
The thermodynamic properties and phase relation of an alkali metal-oxychloride system were examined; this is a basic model system of secondary fly ash generated in the volume reduction process of bottom ash and fly ash from incineration processes. The phase diagram for the NaCl–Na2CO3 system and its thermodynamic properties have been examined by a hot filament method and electromotive force (EMF) method using Na β-Al2O3 as a solid electrolyte from 500°C to 900°C. The liquidus lines and the eutectic temperature show good agreement with previous reports. Activities of Na2CO3 for the NaCl–Na2CO3 system obtained in this study are compared with the data from the phase diagram.
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QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY Vol.1(1983), No.1