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| Author(s): |
Carla Simone Tafuri Marques
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Química |
| Defense date: | 2000-07-06 |
| Examining board members: |
Celso Aparecido Bertran;
Graciela Arbilla;
João Andrade de Carvalho Junior;
Adalberto Bono Maurizio Sacchi Bassi;
Jose de Alencar Simoni
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| Advisor: | Celso Aparecido Bertran |
| Abstract | |
In this work, a kinetic study of radicals in the excited electronic state and a study of soot particles evolution from C2H2/O2 and C2H2/O2/Ar flames in a closed chamber was carry out. In the methodology used the combustion process is turbulent and occurs in the atmospheric air absence. Therefore, we can correlate mixture pressure and composition that burning to species formation and reactions in the flame. The formation kinetic of OH*, CHO*, CH* and C2* excited radicals, which are the main emitters in the hydrocarbon flames was studied by emission intensities as a function of time determination. The soot particle evolution from fuel-rich flames was observed through laser light scattering and absorption. The morphology analysis of these soot particles was executed by scanning electronic microscope. The spectroscopic measurements of emission of excited radicals was associated to computational simulation of combustion kinetics allowing to establish a mechanism of reactions to the turbulent combustion process of C2H2/O2 and to identify the predominant reactions for the formation of excited radicals: H + O2 = OH* + O CH + O = CHO* C2H + O2 = CH* + CO2 CH2 + C = C2* + H2 (AU) | |