EFFECTS OF VOLATILE-CHAR INTERACTION ON THE GASIFICATION OF A VICTORIAN BROWN COAL AT 800 C: COMPARISION BETWEEN GASIFICATION IN STEAM AND CO2

摘要：

This study aims to investigate the effects of volatile-char interaction on coal conversion during the gasification of a Victorian brown coal at 800 ℃ in steam and CO2 in a novel quartz fluidised-bed reactor. Volatile-char interaction time was varied to examine the effects of the extent of volatile-char interaction on coal conversion during gasification. The reactivities of the chars from the partial gasification in CO2 and steam were also measured in a thermogravimetric analyser at 400 ℃ in air. Our results indicate that the volatile-char interaction has a significantly negative effect on coal conversion. The reactivity in air at 400 ℃ of the chars from the partial gasification in steam shows different magnitude from that of the chars from the partial gasification in CO2. These results appear to imply that there were different reaction pathways for char-H2O and char-CO2/char-O2 reactions.

关键词： volatile-char interaction reactivity gasification brown coal

作者: Shu ZHANG Huiling TAY Fujun TIAN Chunzhu LI

作者单位: Department of Chemical Engineering, PO Box 36, Monash University, VIC 3800, Australia

会议类型: 国际会议

会议名称: 第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)

会议地点: 武汉

会议语种:英文

页码: 554-557

在线出版日期: 2007-12-01（万方平台首次上网日期，不代表论文的发表时间）