Wenfeng Dong This email address is being protected from spambots. You need JavaScript enabled to view it., Mengxiang Fang, Tao Wang, Fei Liu, Ningtong Yi

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Received: July 3, 2020
Revised: September 3, 2020
Accepted: September 3, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.2020.07.0374  

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Cite this article:

Dong, W., Fang, M., Wang, T., Liu, F. and Yi, N. (2020). CO2 Capture by Using a Membrane-absorption Hybrid Process in the Nature Gas Combined Cycle Power Plants. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.2020.07.0374


HIGHLIGHTS

  • Mass transfer model of CO2/N2/H2O separation membrane was established in Aspen plus.
  • Mass transfer, area and power were studied under different operating conditions.
  • Effect of CO2 concentration of permeate gas on absorption was studied.
  • Feed/permeate gas pressure ratio was optimization for reducing compressor power.
 

ABSTRACT 


The main research objective of this paper was to optimize the design parameters of the hybrid membrane - absorption CO2 capture process in Natural Gas-steam Cycle (NGCC) power plants. To predict the CO2 concentration in permeate gas and required membrane area, a mass transfer calculation model of CO2/N2/H2O separation membrane was established in Aspen plus. Effect of CO2 recovery rate of membrane unit, operating pressure proportion of feed gas pressure over permeate gas pressure and flue gas flow ratio on membrane area, compressor power and solution regeneration duty were studied based on membrane calculation model. The optimal parameter of feed/permeate side pressure ratio and flow ratio are 10:1 and 50% respectively. The solution regeneration duty of hybrid process reduced at over 20.7% than traditional chemical absorption process.


Keywords: Membrane-absorption process; Mass transfer model; Natural Gas-Steam Combined Cycle power plants; CO2 capture; Monoethanolamine.



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