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Soot formation and growth with palladium acetylacetonate-toluene injection in ethylene base flames investigated by in situ synchrotron small-angle X-ray scattering

Journal Article · · Proceedings of the Combustion Institute

Organo-Pd compounds as fuel additives are proven to have distinct catalytic effects on enhancing ignition and combustion performance. However, their effects on soot emission and the mechanism are not well-established. In this study, the effect of palladium acetylacetonate (Pd(C5H7O2)2, Pd(acac)2) on soot formation and growth was investigated experimentally. Different concentrations of Pd(acac)2 were added in the ethylene flames. Synchrotron small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM) were used to detect the soot particles to obtain the size, shape and morphology information. The results show that the Pd(acac)2 addition with low concentration (100 ppm) suppresses the formation and growth of the primary soot particles at each height above the burner. As the addition concentration increases to 200 and 300 ppm, the size and volume fraction of the soot particles are decreased at the low flame region, and increased at the high flame region. Furthermore, detailed size distribution, morphology and nanostructure information of the soot particles at different flame heights are discussed.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1833601
Alternate ID(s):
OSTI ID: 1817941
Journal Information:
Proceedings of the Combustion Institute, Journal Name: Proceedings of the Combustion Institute Journal Issue: 1 Vol. 38; ISSN 1540-7489
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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