Linghong Chen1, Jianwu Zhou1, Xianjue Zheng2, Jian Wu1, Xuecheng Wu 1, Xiang Gao1, Gérard Gréhan3, Kefa Cen1

  • 1 State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
  • 2 Hangzhou Environmental Monitoring Center Station, Hangzhou 310027, China
  • 3 UMR 6614/CORIA, CNRS, BP12 76801 Saint Etienne du Rouvray, France

Received: August 15, 2017
Revised: September 13, 2017
Accepted: September 13, 2017
Download Citation: ||https://doi.org/10.4209/aaqr.2017.08.0271  

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Cite this article:
Chen, L., Zhou, J., Zheng, X., Wu, J., Wu, X., Gao, X., Gréhan, G. and Cen, K. (2017). Effects of Carbon Dioxide Addition on the Soot Particle Sizes in an Ethylene/Air Flame. Aerosol Air Qual. Res. 17: 2522-2532. https://doi.org/10.4209/aaqr.2017.08.0271


HIGHLIGHTS

  • Absorption function are investigated to study the effect of CO2 dilution.
  • Flame heights are measured to study the effect on flame structure.
  • Soot particle sizes are measured to study the effect on soot formation.

 

ABSTRACT


Carbon dioxide (CO2) is an important compound for the inhibition of combustion flame. This work investigated the effects of CO2 addition on the soot particle sizes in axisymmetric laminar co-flow ethylene/air diffusion flames, as determined by using temporal laser-induced incandescence (LII). Additionally, the flame height and absorption function of soot particles were also studied. The results showed that the size and absorbency of soot particles decreases with the addition of CO2. The total flame height also decreases with CO2 addition, while the height of the dark region grows. These results show that CO2 addition dilutes the gas stream, compresses the nucleation of soot particles and makes them less mature. This study provides useful information for the control of soot particle formation during combustion processes.


Keywords: Carbon dioxide dilution; Flame height; Laser-induced incandescence; Particle sizes; Absorption function


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