Phase Relation and Thermodynamic Properties of NaCl-Na<SUB>2</SUB>CO<SUB>3</SUB> System as a Basic System for Secondary Fly Ash in Incineration Processes of Municipal Wastes

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  • Iwasawa Kokoro
    Institute of Industrial Science, The University of Tokyo
  • Yamaguchi Shu
    Department of Material Science and Engineering, School of Engineering, The University of Tokyo,(Department of Material Science and Engineering, Nagoya Institute of Technology)
  • Maeda Masafumi
    Institute of Industrial Science, The University of Tokyo

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  • Phase Relation and Thermodynamic Properties of NaCl-Na2CO3 System as a Basic System for Secondary Fly Ash in Incineration Processes of Municipal Wastes

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Description

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.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 42 (12), 2480-2486, 2001

    The Japan Institute of Metals and Materials

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