Cristin-resultat-ID: 1086709
Sist endret: 2. juni 2017, 13:28
NVI-rapporteringsår: 2013
Resultat
Vitenskapelig artikkel
2013

Investigation of High-Temperature CO2 Capture by CaO in CaCl2 Molten Salt

Bidragsytere:
  • Viktorija Tomkute
  • Asbjørn Solheim og
  • Espen Olsen

Tidsskrift

Energy & Fuels
ISSN 0887-0624
e-ISSN 1520-5029
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2013
Trykket: 2013
Volum: 27
Hefte: 9
Sider: 5373 - 5379

Importkilder

Isi-ID: 000330100000037

Beskrivelse Beskrivelse

Tittel

Investigation of High-Temperature CO2 Capture by CaO in CaCl2 Molten Salt

Sammendrag

Modifications of CaO-based sorbents with various inorganic salts to overcome the degradation in the reactivity between the active material and CO2 in a carbon capture process have previously been evaluated. The present paper focuses on the performance of a novel CO2 capture technology, where CaCl2 is applied as the solvent for the dissolution/dispersion of CaO and CaCO3. CO2 capture by CaO was carried out with carbonation temperatures in the range of 770–830 °C by bubbling simulated flue gas through the melt, using a fully automated flow-through atmospheric pressure reactor. Subsequently, decomposition of the formed CaCO3 to CaO and CO2 was conducted at 910–950 °C using pure N2. Online gas analysis was performed using a Fourier transform infrared (FTIR) gas detector and gravimetric analysis. The results indicate that the CaO carbonation efficiency decreases at temperatures higher than 800 °C. Increasing the concentration of CaO enhances the carbonation reaction. The amount of CO2 uptake for 15 wt % CaO in calcium dichloride was 0.541 g of CO2/g of sorbent. Moreover, investigation of CO2 absorption/desorption by 5.32 wt % CaO in CaCl2 at 787 °C showed an increase in CaO reactivity, defined as the ratio between the real and theoretical CO2 sorption per unit of CaO, from 55.4 to 64.2% after 10 cycles. In all cases, the decarbonation process proceeded rapidly, reaching 100% efficiency.

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

Espen Olsen

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