STUDY ON THE COMPONENT OF PULVERIZED COAL SURFACE AND ITS REACTIVITY DURING LOW-TEMPERATURE OXIDATION
STUDY ON THE COMPONENT OF PULVERIZED COAL SURFACE AND ITS REACTIVITY DURING LOW-TEMPERATURE OXIDATION
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DOI：
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发表时间：
2006
影响因子：
2.4
通讯作者：
F. Pei
中科院分区：
文献类型：
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作者：
F. Pei
针对煤的低温氧化对着火、反应性、焦炭质量和自燃的影响，采用热重-差示扫描量热（TGA）和扫描电镜-电子背散射（FSEM）对无烟煤和烟煤的低温氧化进行了研究，结果表明：对于反应性较高的煤，热解过程中煤焦表面固相氧浓度的增加远大于煤焦吸附氧的表观增重;最大吸附氧量对应的着火温度随煤堆数和升温速率的增加而增加，煤的反应性以升温速率小于1/12 K/s时煤的氧化速率和最大吸附氧量最大为特征，中煤堆煤的反应性最强，中煤堆煤的氧化速率和最大吸附氧量最大，中煤堆煤的反应性最强，中煤堆煤的氧化速率和最大吸附氧量最大。煤吸附氧的活化能经历了初始活化能降低到很低，然后上升到很高，直至结束的过程。
For the coal oxidation at low temperature significantly influencing on ignition, reactivity, quality of coke and self-ignition, anthracite and soft coal oxidation were studied at low-temperature by making use of TGA-DSC AND FSEM-EBSP, it is shown that for the higher reactivity coal, the increment of solid phase oxygen concentration on char surface is much more than the apparent weight increment for char adsorbing oxygen in TGA; The ignition, corresponding temperature of the maximum quantity of adsorbing oxygen, increases with the increase of coal bank and heating rate; The reactivity is characterized by maximum rate of coal oxidation and the maximum quantity of adsorbing oxygen at heating rate less than 1/12 K/s; The most reactive coal is in the middling coal-bank; Coal adsorbing oxygen goes through initial activation energy, and decreasing to a very low level, then rising up to a very high level until ending up the course.