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Efficient capture of carbon dioxide with novel mass-transfer intensification device using ionic liquids

Authors

  • Liang-Liang Zhang,

    1. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing, P.R. China
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  • Jie-Xin Wang,

    1. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing, P.R. China
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  • Zhi-Ping Liu,

    1. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing, P.R. China
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  • Ying Lu,

    1. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing, P.R. China
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  • Guang-Wen Chu,

    1. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, P.R. China
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  • Wen-Chuan Wang,

    1. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing, P.R. China
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  • Jian-Feng Chen

    Corresponding author
    1. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, P.R. China
    • State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing, P.R. China
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Correspondence concerning this article should be addressed to J.-F. Chen at chenjf@mail.buct.edu.cn.

Abstract

A novel mass-transfer intensified approach for CO2 capture with ionic liquids (ILs) using rotating packed bed (RPB) reactor was presented. This new approach combined the advantages of RPB as a high mass-transfer intensification device for viscous system and IL as a novel, environmentally benign CO2 capture media with high thermal stability and extremely low volatility. Amino-functionalized IL (2-hydroxyethyl)-trimethyl-ammonium (S)−2-pyrrolidinecarboxylic acid salt ([Choline][Pro]) was synthesized to perform experimental examination of CO2 capture by chemical absorption. In RPB, it took only 0.2 s to reach 0.2 mol CO2/mol IL at 293 K, indicating that RPB was kinetically favorable to absorption of CO2 in IL because of its efficient mass-transfer intensification. The effects of operation parameters on CO2 removal efficiency and IL absorbent capacity were studied. In addition, a model based on penetration theory was proposed to explore the mechanism of gas–liquid mass transfer of ILs system in RPB. © 2013 American Institute of Chemical Engineers AIChE J, 59: 2957–2965, 2013

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