Coupling of the Chemical Effects of CO and CO2 on Soot Formation in C2H4 Diffusion Flame in O2-CO2 Atmosphere. Issue 1 (November 2020)

• Record Type: Journal Article
• Authors: Wang, Yang; Liu, Xiaofang; Gao, Yongpan; Gu, Mingyan; Lin, Yuyu
• Is Part Of: IOP conference series. Volume 603:Issue 1(2020)
• Publication Date: 2020-11
• Subjects: Laminar C2H4 diffusion flame -- O2/CO2 atmosphere -- Soot -- Dopant; Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/603/1/012014
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Previous studies found that the chemical effect of CO (CE-CO) enhances the formation of soot in laminar coflow C2 H4 /air diffusion flames, while the chemical effect of CO2 (CE-CO2 ) inhibits soot formation. The coupled CE-CO and CE-CO2 on soot formation characteristics is investigated numerically in O2 -CO2 atmosphere through blending fuel flow rate with 10%, 30% and 50% CO and virtual CO (FCO) in a laminar C2 H4 diffusion flame. The results show that CE-CO increases the flame temperature, while CE-CO2 is opposite; the CE-CO promotes soot formation attributed to soot oxidation process which decreases the mole fraction of OH by OH+CO↔H+CO2, while the CE-CO2 inhibits the formation of soot ascribed to the increase of OH and O2 concentration promoting soot oxidation rate and the decrease of flame temperature, mole fractions of C2 H2 and H inhibiting surface growth rate. Moreover, the chemical promotion effect of CO decreases in O2 -CO2 atmosphere, and the coupled CE-CO and CE-CO2 suppresses soot formation.