SciELO - Scientific Electronic Library Online

 
vol.13 número1Reactivity of Tungsten-aryloxides with Hydrosilane Cocatalysts in Olefin MetathesisFlow-Injection Solid Phase Partial Least-Squares Spectrophotometric Simultaneous Determination of Iron, Nickel and Zinc índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Journal of the Brazilian Chemical Society

versão impressa ISSN 0103-5053

Resumo

BERTRAN, Celso A.; MARQUES, Carla S. T.  e  BENVENUTTI, Leandro H.. Temporal Evolution of Soot Particles from C2H2/O2 Combustion in a Closed Chamber. J. Braz. Chem. Soc. [online]. 2002, vol.13, n.1, pp. 47-53. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532002000100007.

An experimental study of soot formation in C2H2/O2 flames at different C/O ratios in a closed chamber was carried out. The evolution temporal behavior and the volume fraction of soot particles were determined by laser extinction. It was found that total time for the soot formation phenomenon in flames from C2H2/O2 with C/O ratio > 0.75 or C2H2/O2/Ar with C/O ratio = 1.00 was around 3.0-4.0 ms after ignition. At almost the same time the excited radicals reached their maximum emission intensity and the gases under combustion reached their maximum pressure. The micrographs show compact and approximately spherical soot particles with diameters within 60-150 nm. However, soot aggregates are not compact and they present a netlike structure similar to that of an aerogel.

Palavras-chave : soot formation; closed chamber; combustion; laser extinction.

        · resumo em Português     · texto em Inglês     · pdf em Inglês