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EXTINCTION IN THE SOOT PARTICLES ENSEMBLE
https://doi.org/10.15518/isjaee.2017.10-12.086-093
Abstract
The formation of soot particles during the combustion of hydrocarbon fuel relates to the incomplete combustion. The degree of chemical unburnt can reach 10–15%. The paper studies the soot extinction in hydrocarbon flames. Soot particles can reveal itself as a homogeneous structure or contain multiple functional groups bound to the carbon skeleton. The presence of molecules and their fragments or other chemical bonds in the substance was determined by Fourier Transform Infrared Spectrometer FTIR-1201. Spectrograms of analyzed samples were recorded in the range of 4000 cm-1 to 400 cm-1. Strong absorption in a wide spectral range of 4000 cm-1 to 500 cm-1 is typical to the soot samples of saturated hydrocarbons. Radiation absorption by radicals С = С, СН, СН2, СН3 in a spectral range of 3000 cm-1 to 1000 cm-1 and hydroxyl OH-group in a spectral range of 3600 cm-1 to 3200 cm-1 is typical to the soot samples of aromatics. The paper detects some nanostructures as С60 (ν = 1430 cm-1) and С70 (ν = 1460 cm-1). Carbon nano-tubes grown by catalytic methane as defect-free structure have high transparency. Strong absorption lines by С = С, СН, СН2, СН3 were observed in the range of 1800 cm-1 to 1000 cm-1. Soot particles are the main radiator in the IR-region which determines flame’s emission ability. During thermal exposure (afterburning), active centers were identified in the soot particles ensemble, along with their location and the nature of their structure. Soot particles with more developed surface have a shorter induction time of reacting with oxygen in the air and are more active. The induction time of active centers in highly disperse soot is much higher.
About the Authors
O. V. Vasileva
Chuvash State University named after I.N. Ulyanova
Russian Federation
Ph.D. Student, Senior Lecturer at the Department of Applied Physics and Nanotechnology
Russian Federation
Ph.D. Student, Senior Lecturer at the Department of Applied Physics and Nanotechnology
S. I. Ksenofontov
Chuvash State Pedagogical University named after I.Y. Yakovlev
Russian Federation
Ph.D. (physics and mathematics), Professor at the Department of General and Theoretical Physics
Russian Federation
Ph.D. (physics and mathematics), Professor at the Department of General and Theoretical Physics
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Review
For citations:
Vasileva O.V., Ksenofontov S.I. EXTINCTION IN THE SOOT PARTICLES ENSEMBLE. Alternative Energy and Ecology (ISJAEE). 2017;(10-12):86-93. (In Russ.) https://doi.org/10.15518/isjaee.2017.10-12.086-093
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