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Liquid CO2 droplet extraction from gases

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  • Theunissen, Ton
  • Golombok, Mike
  • Brouwers, J.J.H. (Bert)
  • Bansal, Gagan
  • van Benthum, Rob

Abstract

Efficient mechanical separation of CO2 from combustion effluent affects the utilization potential of high CO2 producers such as coal. Novel mechanical separations of condensing CO2 from gas flows need to be able to capture the small condensed droplets below the cyclone cut-off limit of 20 μm. We describe the thermodynamics, the energy costs and droplet formation of CO2 phase separation from combustion effluent and natural gas. We report the first measurements of condensing CO2 droplet sizes from gas. This shows that application of homogeneous condensation of CO2 yields much smaller droplets in flue gas (N2/CO2) than from contaminated natural gas (CH4/CO2). These small droplets can only be efficiently removed at high throughputs using the novel centrifugal method we describe. Such mechanical separations are preferable to the current standard chemical methods because of the much lower environmental footprint.

Suggested Citation

  • Theunissen, Ton & Golombok, Mike & Brouwers, J.J.H. (Bert) & Bansal, Gagan & van Benthum, Rob, 2011. "Liquid CO2 droplet extraction from gases," Energy, Elsevier, vol. 36(5), pages 2961-2967.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:5:p:2961-2967
    DOI: 10.1016/j.energy.2011.02.040
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    References listed on IDEAS

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    1. Pellegrini, G. & Strube, R. & Manfrida, G., 2010. "Comparative study of chemical absorbents in postcombustion CO2 capture," Energy, Elsevier, vol. 35(2), pages 851-857.
    2. David Cyranoski, 2007. "China struggles to square growth and emissions," Nature, Nature, vol. 446(7139), pages 954-955, April.
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    1. van Benthum, R.J. & van Kemenade, H.P. & Brouwers, J.J.H. & Golombok, M., 2012. "Condensed Rotational Separation of CO2," Applied Energy, Elsevier, vol. 93(C), pages 457-465.
    2. Wenchao Yang & Shuhong Li & Xianliang Li & Yuanyuan Liang & Xiaosong Zhang, 2015. "Analysis of a New Liquefaction Combined with Desublimation System for CO 2 Separation Based on N 2 /CO 2 Phase Equilibrium," Energies, MDPI, vol. 8(9), pages 1-14, September.

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    Keywords

    CO2 capture; Droplets; Mechanical separations;
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