SciELO - Scientific Electronic Library Online

 
 número43Determination of the specific oxygen uptake rate in microorganisms including electrode time responseProduction and characterization of porous bodies of synthetic hydroxyapatite índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Revista Facultad de Ingeniería Universidad de Antioquia

versão impressa ISSN 0120-6230
versão On-line ISSN 2357-53280

Resumo

ROJAS G, Andrés Felipe  e  BARRAZA BURGOS, Juan Manuel. Char morphology characterization from pulverized coals: experimental determination. Rev.fac.ing.univ. Antioquia [online]. 2008, n.43, pp.42-58. ISSN 0120-6230.

During the devolatilisation process, coal particles change their structure due to the liberation of its volatile matter. A porous solid rich in fixed carbon ('Char') with different morphologies is obtained. At a tubular reactor the chars from three bituminous coal (La Yolanda, El Cerrejón and Thoresby), three devolatilization temperatures (900, 1000 and 1100ºC) and three times (100, 150 and 300 ms) were obtained. Those morphologies were identified using an automatic image analysis technique. By this technique, the average area, the half wall-thickness, the percentage of smaller wall-thickness to 3 and 5 µm, the porosity and the percentage of morphotypes for each particle char sample was determined. It was found that both the porosity and the smallest wall-thickness to 3 and 5 µm, decreased with the increase of the devolatilization time and temperature. The half wall-thickness had a contrary behaviour. It was also found that the coal from El Cerrejón produced high concentration of tenuisphere chars, while the coal from La Yolanda generates mainly crassinetwork chars.

Palavras-chave : char morphology; pulverized coal; tube reactor; image analysis.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons