热重法研究K2CO3与Fe2O3对煤粉燃烧反应性的影响

利用综合热重分析仪分别研究了K₂CO₃、Fe₂O₃对褐煤、烟煤、无烟煤、石墨等不同燃料的催化燃烧反应性的影响。结果表明，催化剂种类、添加量、粒径和燃料的变质程度对催化燃烧具有一定的影响；向无烟煤中加入K₂CO₃、Fe₂O₃两种催化剂，无烟煤的燃点由458℃分别降为319℃、405℃，燃烧速率由11.94%/min分别提高到26.40%/min、17.66%/min。K₂CO₃、Fe₂O₃对褐煤和烟煤的燃点没有明显的降低作用，但是对无烟煤和石墨燃点有明显的降低作用，且随着煤变质程度的增加，燃点降低幅度增大。由于引起燃点和燃速变化的原因不同，所以加入催化剂后造成燃点和燃速的变化也不同。

Effect of K_2CO_3 and Fe_2O_3 on combustion reactivity of pulverized coal by thermogravimetry analysis

The effects of K₂CO₃， Fe₂O₃ on catalytic combustion reactivity of different rank fuels such as lignite, bituminous coal, anthracite and graphite were investigated by a synthetical thermal analyzer. The results show that the type and content of catalysts, particle size and rank of fuel are important factors influencing catalytic combustion. When K₂CO₃ and Fe₂O₃ were added, ignition temperature of anthracite decreases from 458℃ to 319℃ and 405℃, respectively. And its combustion rate increases from 11.94%/min to 26.40%/min and 17.66%/min, respectively. There are not evident effects of K₂CO₃， Fe₂O₃ on decreasing ignition temperature of lignite and bituminous coal, but ignition temperature of anthracite and graphite decreases remarkably. With increasing rank of fuel, extent of decreasing ignition temperature is enhanced. Due to different factors led to changes of ignition temperature and combustion rate which changes are different too when catalyst is present.