Reduction of soot emissions by iron pentacarbonyl in isooctane diffusion flames

Journal Article · Tue Jul 15 00:00:00 EDT 2008 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2008.01.011· OSTI ID:21044879

Kim, K B; Masiello, K A; Hahn, D W ^[1]

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1. Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611 (United States)

Light-scattering measurements, in situ laser-induced fluorescence, and thermophoretic sampling with transmission electron microscopy (TEM) analysis, were performed in laboratory isooctane diffusion flames seeded with 4000 ppm iron pentacarbonyl. These measurements allowed the determination of the evolution of the size, number density, and volume fraction of soot particles through the flame. Comparison to unseeded flame data provided a detailed assessment of the effects of iron addition on soot particle inception, growth, and oxidation processes. Iron was found to produce a minor soot-enhancing effect at early residence times, while subsequent soot particle growth was largely unaffected. It is concluded that primarily elemental iron is incorporated within the soot particles during particle inception and growth. However, iron addition was found to enhance the rate of soot oxidation during the soot burnout regime, yielding a two-thirds reduction in overall soot emissions. In situ spectroscopic measurements probed the transient nature of elemental iron throughout the flame, revealing significant loss of elemental iron, presumably to iron oxides, with increasing flame residence, suggesting catalysis of soot oxidation via iron oxide species. (author)

• OSTI ID: 21044879
• Journal Information: Combustion and Flame, Vol. 154, Issue 1-2; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
IRON
SOOT
IRON COMPOUNDS
CARBONYLS
OCTANE
OXIDATION
IRON OXIDES
FLAMES
MINIMIZATION
PARTICLE SIZE
DIFFUSION
COMPARATIVE EVALUATIONS
FUEL ADDITIVES
POLLUTION CONTROL
DENSITY
AUGMENTATION
BURNOUT
CATALYSIS
TIME DEPENDENCE
TRANSIENTS
Iron pentacarbonyl
Soot emissions control