Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/25189
Type: Artigo de periódico
Title: Study of the particulate matter emitted from residual oil combustion and natural gas reburning
Author: Bertran, Celso A.
Marques, Carla S. T.
Abstract: In this work, a study of the particulate matter emitted from standard residual oil combustion and from natural gas reburning during oil combustion in a pilot scale furnace was carried out. The sizes, morphologies and chemical element distribution of particles were analyzed through scanning electron microscopy coupled to an X-ray energy dispersive spectrometer (EDS). The microscopy results show three sorts of particles: spherical, very compact and smooth cenospheres with sizes of 0.6-1.5 mum; cenospheres with a few pores with sizes of 10-20 mum and larger porous cenospheres with sizes of 20-50 mum. The particulate emitted from standard oil combustion shows predominantly spherical and very compact small cenospheres, with a smooth surface, while those emitted from the reburning process present a majority of larger porous cenospheres. The EDS microanalysis showed mainly Al and Si in the smaller cenospheres and mostly S and V in the cenospheres with a few pores and in the larger porous cenospheres.
Neste trabalho, realizou-se o estudo dos materiais particulados emitidos na combustão de óleo residual do tipo 4B e na requeima de gás natural aplicada à combustão deste óleo numa fornalha em escala piloto. Os tamanhos, as morfologias e a distribuição dos elementos inorgânicos nas partículas foram analisados por microscopia eletrônica de varredura acoplado a um espectrômetro de energia dispersiva de raio-X (EDS). Foram observados três tipos de partículas: cenosferas esféricas, compactas e lisas de 0,6 a 1,5 mim; cenosferas com poucos poros de aproximadamente 10-20 mim e cenosferas porosas na faixa de 20-50 mim. O particulado emitido na combustão de óleo residual apresenta predominantemente as pequenas cenosferas compactas e lisas, enquanto que o emitido no processo de requeima mostra preferencialmente as cenosferas maiores e porosas. As microanálises de EDS mostraram principalmente Al e Si nas partículas menores e S e V nas cenosferas com poucos poros e nas cenosferas porosas e maiores.
Subject: particulate matter
residual oil combustion
natural gas reburning
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0103-50532004000400017
Address: http://dx.doi.org/10.1590/S0103-50532004000400017
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000400017
Date Issue: 1-Aug-2004
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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