Soot Formation and Growth in Toluene/Ethylene Combustion Catalyzed by Ruthenium Acetylacetonate

Zhang, Fanggang; Wang, Cong; Wang, Juan; Seifert, Sönke; Winans, Randall E.

doi:10.1080/00102202.2021.2013830

Soot Formation and Growth in Toluene/Ethylene Combustion Catalyzed by Ruthenium Acetylacetonate

Journal Article · Mon Dec 13 23:00:00 EST 2021 · Combustion Science and Technology

DOI:https://doi.org/10.1080/00102202.2021.2013830· OSTI ID:2569655

^[1]; Wang, Cong ^[1]; ^[1]; Seifert, Sönke ^[2]; Winans, Randall E. ^[2]

Beihang University, Beijing (China)
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Ruthenium-based compounds are efficient catalysts to enhance combustion performance and suppress soot emission. However, systematic mechanism and in-situ research on reducing soot are rarely addressed. In this study, ruthenium acetylacetonate (Ru(C₅H₇O₂)₃, Ru(acac)₃) was utilized as the catalyst precursor in different concentration conditions to investigate its impacts on the size, volume, and morphology of the soot particles in the ethylene flames with central toluene injection. The soot particles were detected by in-situ small-angle X-ray scattering (SAXS) and ex-situ transmission electron microscopy (TEM). This study confirms that Ru(acac)₃ can suppress the surface growth for the primary soot particles, but no significant change of the morphology has been discovered for the aggregates. Compared with the undoped flame, the volume of the soot particles in the Ru(acac)₃-doped flames is lower and the particle size is smaller, indicating a valid inhibition effect of Ru(acac)₃ on the soot emission by affecting its surface growth and oxidation process. In conclusion, despite the remarkable distinction between the undoped and doped flames, no obvious difference is found between the flames with different catalyst concentrations.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Natural Science Foundation of China

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 2569655

Journal Information:: Combustion Science and Technology, Journal Name: Combustion Science and Technology Journal Issue: 10 Vol. 195; ISSN 1563-521X; ISSN 0010-2202

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
catalyst
in-situ small angle X-ray scattering
oxidation
ruthenium acetylacetonate
soot
surface growth

Soot Formation and Growth in Toluene/Ethylene Combustion Catalyzed by Ruthenium Acetylacetonate

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