Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (7): 1608-1617.doi: 10.1016/j.cjche.2018.11.003

• Separation Science and Engineering • Previous Articles     Next Articles

Characterizing the catalyst fluidization with field synergy to improve the amine absorption for CO2 capture

Yunsong Yu1, Chen Zhang1, Zaoxiao Zhang1,2, Geoff Wang3   

  1. 1 School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China;
    2 State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    3 School of Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia
  • Received:2018-08-14 Online:2019-07-28 Published:2019-10-14
  • Contact: Zaoxiao Zhang

Abstract: There are great interests to capture the CO2 to control the greenhouse gas emission. Amine absorption of CO2 is being taken as an effective way to capture CO2 in industry. However, the amine absorption of CO2 is cost-ineffective due to great energy consumption and solution consumption. In order to reduce the capture cost, catalyst fluidization is proposed here to intensify the mass transfer and heat transfer. Catalyst fluidization with field synergy and DFT model is developed by incorporating the effects of catalyst reaction kinetics, drag force and multi-field into the mass transfer, heat transfer, fluid flow and catalyst collision. Experiments with an improved distributor are performed well to validate the model. The reaction kinetics is determined by the DFT simulation and experiment. The mass transfer coefficient in the fluidized reactor is identified as 17% higher than the conventional packed reactor. With the field synergy of catalyst fluidization, the energy consumption for CO2 desorption is reduced by 9%. Stepwise operation and inclination reactor are used to improve catalyst fluidization process.

Key words: CO2 capture, Catalyst fluidization, Mass transfer, DFT, Energy consumption, Field synergy