Kinetics of cyanate decomposition in alkaline solutions of high ionic strength: the catalytic effect of bicarbonate

Nikolai De Martini, Dmitry Murzin, M Forssen, Mikko Hupa

    Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

    6 Citeringar (Scopus)

    Sammanfattning

    This paper clarifies the catalytic effect of bicarbonate on the decomposition of cyanate in highly alkaline solutions of high ionic strength at 94 degreesC containing sodium cyanate (0.019 M), sodium hydroxide (0.1-0.9 M), and sodium carbonate (0-1.1 M). Activity coefficients were calculated to account for nonideality in determining the concentration of bicarbonate in solutions with a pH above pK(a,HCO3)-. A rate equation is presented, and parameter estimation was used to obtain values for the rate constants based on the experimental data. Finally our data and literature data was used to derive the temperature dependence of the relevant rate constants and compare the predictions of the kinetic model against the experimental results with three kraft pulp mill green liquors.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)4815–4821
    Antal sidor7
    TidskriftIndustrial & Engineering Chemistry Research
    Volym43
    Utgåva16
    DOI
    StatusPublicerad - 2004
    MoE-publikationstypA1 Tidskriftsartikel-refererad

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