SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (10): 2390-2396.DOI: 10.1016/j.cjche.2019.01.021

• Separation Science and Engineering • Previous Articles     Next Articles

Experimental studies of air-blast atomization on the CO2 capture with aqueous alkali solutions

Zheng Li1,2, Xiaoyan Ji2, Zhuhong Yang1, Xiaohua Lu1   

  1. 1 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
    2 Energy Engineering, Division of Energy Science, Luleå University of Technology, Luleå 97187, Sweden
  • Received:2018-12-27 Revised:2019-01-21 Online:2020-01-17 Published:2019-10-28
  • Contact: Xiaohua Lu
  • Supported by:
    Supported by the National Natural Science Foundation of China (21729601, 21776123), the Doctoral Program of Higher Education (20133221110001) and the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and the Kempe Foundations, and Swedish Energy Agency (P40548-1).

Experimental studies of air-blast atomization on the CO2 capture with aqueous alkali solutions

Zheng Li1,2, Xiaoyan Ji2, Zhuhong Yang1, Xiaohua Lu1   

  1. 1 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
    2 Energy Engineering, Division of Energy Science, Luleå University of Technology, Luleå 97187, Sweden
  • 通讯作者: Xiaohua Lu
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21729601, 21776123), the Doctoral Program of Higher Education (20133221110001) and the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and the Kempe Foundations, and Swedish Energy Agency (P40548-1).

Abstract: In this work, an air-blast atomizing column was used to study the CO2 capture performance with aqueous MEA (mono-ethanol-amine) and NaOH solutions. The effects of gas flow rate, the liquid to gas ratio (L/G), the CO2 concentration on the CO2 removal efficiency (η) and the volumetric overall mass transfer coefficient (KGav) were investigated. The air-blast atomizing column was also compared with the pressure spray tower on the studies of the CO2 capture performance. For the aqueous MEA and NaOH solutions, the experimental results show that the η decreases with increasing gas flow rate and CO2 concentration while it increases with increasing L/G. The effects on KGav are more complicated than those for η. When the CO2 concentration is low (3 vol%), KGav increases with increasing gas flow rate while decreases with increasing L/G. However, when the CO2 concentration is high (9.5 vol%), as the gas flow rate and L/G increases, KGav increases first and then decreases. The aqueous MEA solution achieves higher η and KGav than the aqueous NaOH solution. The air-blast atomizing column shows a good performance on CO2 capture.

Key words: Air-blast atomizer, CO2 capture, Aqueous alkali solutions

摘要: In this work, an air-blast atomizing column was used to study the CO2 capture performance with aqueous MEA (mono-ethanol-amine) and NaOH solutions. The effects of gas flow rate, the liquid to gas ratio (L/G), the CO2 concentration on the CO2 removal efficiency (η) and the volumetric overall mass transfer coefficient (KGav) were investigated. The air-blast atomizing column was also compared with the pressure spray tower on the studies of the CO2 capture performance. For the aqueous MEA and NaOH solutions, the experimental results show that the η decreases with increasing gas flow rate and CO2 concentration while it increases with increasing L/G. The effects on KGav are more complicated than those for η. When the CO2 concentration is low (3 vol%), KGav increases with increasing gas flow rate while decreases with increasing L/G. However, when the CO2 concentration is high (9.5 vol%), as the gas flow rate and L/G increases, KGav increases first and then decreases. The aqueous MEA solution achieves higher η and KGav than the aqueous NaOH solution. The air-blast atomizing column shows a good performance on CO2 capture.

关键词: Air-blast atomizer, CO2 capture, Aqueous alkali solutions