Abstract Thermogravimetric test combined with FTIR analysis is conducted to reveal the yield profile of gaseous species and functional groups, both for conventional and superfine pulverized coal (average particle size below or around 20 μm). Generally speaking, the yield of CO2 is less for superfine pulverized coal particle compared with conventional particle size. Since the content of carbonyl group is reduced, the amount of CO2 released during the pyrolysis is more for coal of lower rank (i.e. Neimenggu bituminous coal). CO yield of Neimenggu coal is greater than Shenhua coal, because more side chains and hydroxyl groups are owned by coal of lower rank. As C O group is likely to be linked to the same compound as C C group, the profile of C O group is similar to C C group. H2O evolution of superfine pulverized coal is higher than conventional particle size, for the impact of mechanochemical force for finer particle may be more prominent. With the decrease of the coal particle size, yield trend of CH4 gradually decreases, indicating that superfine pulverized coal is possibly engaged in NO reduction at the early stage of pyrolysis.

中文翻译：

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TG-FTIR分析在超细煤粉中的应用

摘要 结合 FTIR 分析进行热重测试以揭示常规和超细粉煤（平均粒径低于或约 20 μm）的气态物质和官能团的产率曲线。一般而言，与常规粒径相比，超细煤粉颗粒的CO2产率较低。由于羰基含量降低，低级煤（即内蒙古烟煤）在热解过程中释放的CO2量更多。内蒙古煤的CO产率高于神华煤，因为低级煤拥有更多的侧链和羟基。由于 CO 基团可能与 CC 基团连接到相同的化合物，因此 CO 基团的特征类似于 CC 基团。超细煤粉的H2O析出量高于常规粒径，因为机械化学力对细粒的影响可能更突出。随着煤粒径的减小，CH4的产率趋势逐渐降低，表明超细煤粉可能在热解早期参与了NO的还原。