An Acid Dissociation Constant (pK_a)-based Screening of Chemical Absorbents that Preferably Capture and Release Pressurized Carbon Dioxide for Greenhouse Gas Control

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著者

    • TOMIZAKI Kin-ya
    • Chemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
    • SHIMIZU Shinkichi
    • Chemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
    • ONODA Masami
    • Chemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
    • FUJIOKA Yuichi
    • Chemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)

抄録

We describe an acid dissociation constant (p<I>K</I><SUB>a</SUB>)-based screening of chemical absorbents to treat a gas stream containing carbon dioxide (CO<SUB>2</SUB>) in a wide range of partial pressures (0.1–4 MPa). The solubility differences of CO<SUB>2</SUB> in aqueous amine solutions at 40 and 70 °C plotted against p<I>K</I><SUB>a</SUB> revealed volcano-shaped profiles. The availability of amines with p<I>K</I><SUB>a</SUB> values suitable for capture/release cycles of CO<SUB>2</SUB> with targeted partial pressures shows that the p<I>K</I><SUB>a</SUB>-based screening method would be useful to develop advanced greenhouse gas control technologies.

収録刊行物

  • Chemistry letters  

    Chemistry letters 37(5), 516-517, 2008-05-05 

    The Chemical Society of Japan

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各種コード

  • NII論文ID(NAID)
    10021080307
  • NII書誌ID(NCID)
    AA00603318
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    03667022
  • データ提供元
    CJP書誌  J-STAGE 
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