An Acid Dissociation Constant (p<i>K</i>a)-based Screening of Chemical Absorbents that Preferably Capture and Release Pressurized Carbon Dioxide for Greenhouse Gas Control

DOI PDF 被引用文献3件 参考文献27件
  • Kin-ya Tomizaki
    Chemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
  • Shinkichi Shimizu
    Chemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
  • Masami Onoda
    Chemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
  • Yuichi Fujioka
    Chemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)

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<jats:title>Abstract</jats:title> <jats:p>We describe an acid dissociation constant (pKa)-based screening of chemical absorbents to treat a gas stream containing carbon dioxide (CO2) in a wide range of partial pressures (0.1–4 MPa). The solubility differences of CO2 in aqueous amine solutions at 40 and 70 °C plotted against pKa revealed volcano-shaped profiles. The availability of amines with pKa values suitable for capture/release cycles of CO2 with targeted partial pressures shows that the pKa-based screening method would be useful to develop advanced greenhouse gas control technologies.</jats:p>

収録刊行物

  • Chemistry Letters

    Chemistry Letters 37 (5), 516-517, 2008-04-05

    Oxford University Press (OUP)

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