热解时挥发份的迅速释放及煤的热塑性导致了颗粒内部的空心结构，这种结构有效地提高炭粒的燃烧速率。
During the devolatilization, the hollow structure of coal particles is formed due to the rapid release of volatile, which can result in more rapid combustion of char particles.
不同煤种挥发份燃烧时产物中CO_2和CO的差异很明显，产物中CO_2浓度高的煤种，相应的CO也高。
For different coal, CO_2 and co difference is very obvious in outcomes of volatile combustion. If CO_2 density is high, co is also high.
对于不同的煤种，其挥发份的含量和组分是不同的。
Contents and compositions of coal volatiles are variable for different coals.
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