TRANSFORMATION BEHAVIOR OF EXCLUDED PYRITE DURING O2/CO2 COMBUSTION OF PULVERIZED COAL

摘要：

The present paper was addressed to the transformation of excluded pyrite during O2/CO2 combustion of pulverized coal. Raw pyrite mineral was added to a pulverized coal sample, which was density-fractionated to remove the excluded minerals, to simulate the excluded pyrite present in coal. The mixed sample was burned in a drop tube furnace in O2/CO2 and O2/N2 conditions to generate the residue ash, which was characterized by Mosbauer spectroscopic and size analyses. It was found that, in comparison with O2/N2 combustion at a same oxygen concentration, less iron glass silicate formed from excluded pyrite and silicates although the transformation of pyrite to oxides in O2/CO2 combustion, different from the behaviors of included pyrite observed in previous study. Additionally, less fragmentation of exclude pyrite particles was observed in O2/CO2 combustion.

关键词： Pulverized coal O2/CO2 combustion ezcluded pyrite transformation

作者: Changdong SHENG Jun LIN Yi LI Chao WANG

作者单位: School of Energy and Environment, Southeast University, Nanjing 210096, P.R.China Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai 201800, P.R.China

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: 357-362

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）