Vapor pressure and boiling point elevation of black liquor

Mika Järvinen*, Ari Kankkunen, Cataldo De Blasio, Pasi Miikkulainen

*Tämän työn vastaava kirjoittaja

    Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

    1 Sitaatiot (Scopus)

    Abstrakti

    The objective of this paper is to test Raoult's law for calculating the boiling point elevation and the vapor pressure of black liquor. The vapor pressure of black liquor is an essential variable in black liquor evaporation, spraying and black liquor droplet drying during combustion. Typically only the boiling point elevation at the atmospheric pressure is reported and no simple models to estimate the vapor pressure are available. The model presented here is based on Raoult's law for a binary solution of water and dry solids matter. Starting from this we derived an equation for boiling point elevation as a function of pressure and dry solids content. This model was then fitted to experimental data on boiling point elevation available for 14 different black liquors. The only free variable for single black liquor is the apparent molar mass of dissolved species. The model presented gave a good correlation with experiments, we tested 14 black liquors and the accuracy was better than 0.5°C at the range applicable for spraying conditions.

    AlkuperäiskieliEnglanti
    Sivut411-416
    Sivumäärä6
    JulkaisuNordic Pulp and Paper Research Journal
    Vuosikerta30
    Numero3
    DOI - pysyväislinkit
    TilaJulkaistu - 2015
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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