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Wetted‐wall column study on CO 2 absorption kinetics enhancement by additive of nanoparticles

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  • Tao Wang
  • Wei Yu
  • Mengxiang Fang
  • Hui He
  • Qunyang Xiang
  • Qinhui Ma
  • Menglin Xia
  • Zhongyang Luo
  • Kefa Cen

Abstract

Nanoparticles suspended in solutions are considered to have the potential to enhance gas‐liquid mass transfer and have been studied for gas separation. In order to reveal the mechanisms of kinetics enhancement, the diffusion and reaction process should be carefully examined. In this paper, CO 2 absorption kinetics of amine‐based solutions with additive of SiO 2 and Al 2 O 3 nanoparticles were investigated by wetted‐wall column experiments. Measurements at different conditions, including solid loading, pressure, and solvent flow rate, show a significant enhancement on CO 2 absorption kinetics. The experiment and model analysis indicate that the micro convective motion induced by particle Brownian movement plays a primary role in mass transfer enhancement. Three solutions, MEA, MDEA, and PZ which have different kinetics were selected to study the impact of nanoparticles on absorption kinetics of solutions with different reaction rate. It is interesting to find that the increased ratio of absorption kinetics by nanoparticle follows the same order with increased solvent reaction rate with CO 2 , which is PZ > MEA > MDEA. The wetted‐wall kinetic model indicates that a diffusion controlled kinetics for PZ solution could result in much more significant kinetic enhancement with additives of nanoparticles. By operation conditions optimization, the liquid side mass transfer rate of MEA solution can be increased over 15%.© 2015 Society of Chemical Industry and John Wiley & Sons, Ltd

Suggested Citation

  • Tao Wang & Wei Yu & Mengxiang Fang & Hui He & Qunyang Xiang & Qinhui Ma & Menglin Xia & Zhongyang Luo & Kefa Cen, 2015. "Wetted‐wall column study on CO 2 absorption kinetics enhancement by additive of nanoparticles," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 5(5), pages 682-694, October.
    • Handle: RePEc:wly:greenh:v:5:y:2015:i:5:p:682-694
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    File URL: http://hdl.handle.net/10.1002/ghg.1509
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    1. Booras, G.S. & Smelser, S.C., 1991. "An engineering and economic evaluation of CO2 removal from fossil-fuel-fired power plants," Energy, Elsevier, vol. 16(11), pages 1295-1305.
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    Cited by:

    1. Rashidi, Hamed & Mamivand, Sajad, 2022. "Experimental and numerical mass transfer study of carbon dioxide absorption using Al2O3/water nanofluid in wetted wall column," Energy, Elsevier, vol. 238(PA).
    2. Zhao, Xingxing & Ding, Yudong & Ma, Lijiao & Zhu, Xun & Wang, Hong & Cheng, Min & Liao, Qiang, 2023. "An amine-functionalized strategy to enhance the CO2 absorption of type III porous liquids," Energy, Elsevier, vol. 279(C).

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