Cristin-resultat-ID: 1163304
Sist endret: 2. juni 2017, 13:35
NVI-rapporteringsår: 2014
Resultat
Vitenskapelig artikkel
2014

Phase equilibria evaluation for CO2 capture: CaO-CaF 2-NaF, CaCO3-NaF-CaF2, and Na 2CO3-CaF2-NaF

Bidragsytere:
  • Viktorija Tomkute
  • Asbjørn Solheim
  • Simas Sakirzanovas
  • Bjarte Arne Øye og
  • Espen Olsen

Tidsskrift

Journal of Chemical and Engineering Data
ISSN 0021-9568
e-ISSN 1520-5134
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2014
Volum: 59
Hefte: 4
Sider: 1257 - 1263

Importkilder

Scopus-ID: 2-s2.0-84898479209

Beskrivelse Beskrivelse

Tittel

Phase equilibria evaluation for CO2 capture: CaO-CaF 2-NaF, CaCO3-NaF-CaF2, and Na 2CO3-CaF2-NaF

Sammendrag

This paper presents partial phase relations for the systems NaF–CaF2, NaF–CaF2–CaO, NaF–CaF2–CaCO3, NaF–CaF2–NaCO3, and NaF–CaF2–Na2CO3–CaCO3. The data were obtained by thermal analysis (TA), thermodynamic calculations (FactSage), and X-ray diffraction (XRD) of quenched samples. There was particular emphasis on revealing the phase formations of CaO, CaCO3, and Na2CO3 in the eutectic composition of NaF–CaF2 for the development of a novel carbon capture technology. Therefore, a thermal analysis of the binary CaF2–NaF system was performed first. A eutectic point was found at 31.9 mol % CaF2 and 814.8 °C. The liquidus isotherms and phase regions of the Na–Ca//F–O and Na–Ca//F–CO3 systems were mapped using FactSage. In addition, some compositions in the NaF–CaF2–CaO and NaF–CaF2–Na2CO3–CaCO3 systems were studied by TA. XRD analysis of the quenched samples was applied for phase identification. Based on the FactSage simulation and the experimental data, the solubility of CaO increases with increasing CaF2 concentration in NaF melt. It was derived that carbonates (Na2CO3 and CaCO3) in NaF–CaF2 are present as intermediate compounds. The reactions of NaF and CaCO3 and the formation of complex carbonates are discussed. In general, there is good agreement between experimental data and simulations.

Bidragsytere

Viktorija Tomkute

  • Tilknyttet:
    Forfatter
    ved Realfag og teknologi ved Norges miljø- og biovitenskapelige universitet

Asbjørn Solheim

  • Tilknyttet:
    Forfatter
    ved Metallproduksjon og prosessering ved SINTEF AS

Simas Sakirzanovas

  • Tilknyttet:
    Forfatter
    ved Vilniaus Universitetas

Bjarte Arne Øye

  • Tilknyttet:
    Forfatter
    ved Metallproduksjon og prosessering ved SINTEF AS

Espen Olsen

  • Tilknyttet:
    Forfatter
    ved Realfag og teknologi ved Norges miljø- og biovitenskapelige universitet
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