TY - JOUR
T1 - Effects of ammonia addition on soot formation in ethylene laminar premixed flames
AU - Shao, Can
AU - Campuzano, Felipe
AU - Zhai, Yitong
AU - Wang, Haoyi
AU - Zhang, Wen
AU - Sarathy, Mani
N1 - KAUST Repository Item: Exported on 2021-09-30
Acknowledgements: The work at KAUST was supported by the Office of Sponsored Research with funds given to the Clean Combustion Research Center. This research used resources of the Core Labs of King Abdullah University of Science and Technology. SC also wants to thank the CCRC Safety Team for their support in the experiment.
PY - 2021/8
Y1 - 2021/8
N2 - This paper presents particle size distributions and chemical compositions of soot measured using a Scanning Mobility Particle Sizer (SMPS) and a Fourier-Transform Ion Cyclotron Resonance Mass Spectrometer (FT-ICR-MS), respectively, in flames of ethylene-oxygen and ethylene-oxygen doped with ammonia. The inhibitory effect of ammonia addition on soot formation in ethylene flames, as well as the influence on soot particle size are discussed. The results of particle size distributions showed that doping with ammonia decreases soot particle size and the volume fraction of soot particles. In this work, the flames were carefully studied under similar temperature conditions, so all observed changes could be attributed to chemical effects. The results of FTICR-MS analysis showed that polycyclic aromatic hydrocarbons (PAHs) were the main compositions in both pure ethylene and ammonia doped ethylene flames. Nitrogen-containing PAHs (N-PAHs) did not contribute significantly to soot nucleation or mass growth processes. Chemical kinetic analysis revealed that C–N species generated in ethylene-ammonia flames removed carbon from participating in soot precursor formation, thereby reducing soot formation.
AB - This paper presents particle size distributions and chemical compositions of soot measured using a Scanning Mobility Particle Sizer (SMPS) and a Fourier-Transform Ion Cyclotron Resonance Mass Spectrometer (FT-ICR-MS), respectively, in flames of ethylene-oxygen and ethylene-oxygen doped with ammonia. The inhibitory effect of ammonia addition on soot formation in ethylene flames, as well as the influence on soot particle size are discussed. The results of particle size distributions showed that doping with ammonia decreases soot particle size and the volume fraction of soot particles. In this work, the flames were carefully studied under similar temperature conditions, so all observed changes could be attributed to chemical effects. The results of FTICR-MS analysis showed that polycyclic aromatic hydrocarbons (PAHs) were the main compositions in both pure ethylene and ammonia doped ethylene flames. Nitrogen-containing PAHs (N-PAHs) did not contribute significantly to soot nucleation or mass growth processes. Chemical kinetic analysis revealed that C–N species generated in ethylene-ammonia flames removed carbon from participating in soot precursor formation, thereby reducing soot formation.
UR - http://hdl.handle.net/10754/672032
UR - https://linkinghub.elsevier.com/retrieve/pii/S0010218021004417
UR - http://www.scopus.com/inward/record.url?scp=85114927298&partnerID=8YFLogxK
U2 - 10.1016/j.combustflame.2021.111698
DO - 10.1016/j.combustflame.2021.111698
M3 - Article
SN - 1556-2921
SP - 111698
JO - Combustion and Flame
JF - Combustion and Flame
ER -