摘要
通过外添加水分改变神府煤含水量,利用高频加热炉进行快速热解,研究了含水量对神府煤快速热解过程的影响,考察了四种含水量神府煤快速热解气相产物分布及变化规律,利用孔/表面分析仪表征了固相产物的结构变化。结果表明,随着煤中含水量升高,热解气总体积和最大释放速率减小;热解焦的比表面积和孔容随含水量升高而增大,与原煤煤焦相比,含水煤制得热解焦中保留了较多小孔,孔隙结构更加发达;水分有利于抑制热解过程孔的阻塞与塌陷,提高煤焦表面的粗糙程度和多孔结构的复杂程度。
The rapid pyrolysis experiments of Shenfu coal with various moisture content prepared by adding water were conducted in a high-frequency furnace to study the influence of moisture content on the thermal behavior.The gas composition and the structure properties of char were analyzed.The result shows that the gas yield and the maximal release rate decrease when the moisture content of coal increases.After pyrolysis,both BET surface and pore volume increase with increasing moisture.Compared to the char from dry coal pyrolysis,the char from pyrolysis of coal with high moisture content has more developed pore structure with more micropores.Furthermore,the moisture can inhabit the occurrence of pore obstruction and collapse during rapid pyrolysis,and also contribute to the enhancement of the surface roughness and the pore structure complexity.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2017年第4期427-435,共9页
Journal of Fuel Chemistry and Technology
