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The identification of unusual microscopic features in coal and their derived chars: influence on coal fluidized bed combustion
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Orientador(es)
Resumo(s)
During the petrographic study of seven feed coals from different origins, it was found that these coals presented microfeatures
such as: material size, shape, weathering, thermally affected particles and contamination. After devolatilization under fluidized bed
conditions, some chars presented the consequences of the above mentioned microfeatures, i.e., unreacted coal, unswelled particles,
coatings and microstratification.
Since the amounts of the microfeatures observed were low (less than 1%), the present study is essentially observational/
descriptional. However, it seems very likely, from the observations that were made, that the occurrence of one or more of these
microfeatures in coal, depending on their kind and abundance, may have significant effect on the coal devolatilization.
Descrição
Palavras-chave
Coal petrography Microfeatures; Char Fluidized bed combustion
Contexto Educativo
Citação
International Journal of Coal Geology. 67 (2006), pp. 202-211