针对煤粉燃烧SCT模型中的氧气可达比表面积,进行了不同煤种的加压热重分析(PTGA)和不同燃尽度下煤焦N_2/BET比表面积的测试,研究表明:煤粉加压燃烧过程中,当平均孔径大于2 nm时,累积比表面积和氧气可达比表面积均随燃尽度的增加而增加,说明该孔径以上的比表面积与燃尽度有很好的相关性;常压下TGA中不同燃尽度下煤焦氧气可达比表面积是PTGA下的1.5~2倍,这部分说明了加压反应速率不可能与压力等倍数增加。
For study on oxygen accessible specific surface area(OASA)of char based on SCT reaction kinetics model,pressured thermogravity analysis(PTGA)for different coal bank and measurement of OASA for different extent of conversion of char have been carried out,it is shown that the cumulative specific surface area and OASA increases respectively with the extent of char conversion when the diameter of pores are more than 2 nm during pressured combustion of pulverized coal in PTGA,it is implied that the strong depend...