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Effect of inhibitors on the thermodynamics and kinetics of spontaneous combustion of coal
Journal of Thermal Analysis and Calorimetry ( IF 4.4 ) Pub Date : 2019-09-12 , DOI: 10.1007/s10973-019-08771-y
Bo Tan , Hongyi Wei , Feichao Zhang , Bin Xu , Kunliang Chen

In order to find a low-cost and better performance inhibitor, this study chose the widely used and effective inhibitors NH4HCO3, ammonium polyphosphate (APP) and waterborne polyacrylate (PA) and designed the TG–DSC and FTIR experiments of coal samples with three kinds of inhibitors to study the effects of different inhibitors on various parameters of spontaneous combustion of coal. The results showed that the mass loss rate of C&APP and C&PA was lower than that of raw coal, and the enthalpy and oxygen absorption quantity of coal obviously reduced, and the content of gas products also reduced to some extent. The two kinds of inhibitors had good retardant effect, but it was not good for C&NH4HCO3. Through the curve-fitting analysis of infrared spectrums, the intrinsic mechanism of retardant effect of PA was studied in depth, and it was found that PA can reduce the decomposition of aliphatic structure and inhibit the formation of oxygen-containing functional groups of coal. Further kinetic analysis was carried out by using the isoconversional method. It is found that adding PA increases activation energy in the oxygen absorption and mass gain stage of coal, which have retardant effect in the primary stage of spontaneous combustion of coal.

中文翻译:

抑制剂对煤自燃热力学和动力学的影响

为了找到一种低成本,性能更好的阻聚剂,本研究选择了广泛使用且有效的阻聚剂NH 4 HCO 3,聚磷酸铵(APP)和水性聚丙烯酸酯(PA),并设计了煤样的TG-DSC和FTIR实验用三种抑制剂研究了不同抑制剂对煤自燃各种参数的影响。结果表明,C&APP和C&PA的质量损失率均低于原煤,并且煤的焓和吸氧量明显降低,气体产物含量也有所降低。两种抑制剂均具有良好的缓蚀作用,但对C&NH 4 HCO 3却不利。。通过红外光谱的曲线拟合分析,深入研究了PA阻滞作用的内在机理,发现PA可以减少脂肪族结构的分解,抑制煤中含氧官能团的形成。使用同转化方法进行了进一步的动力学分析。研究发现,添加PA可以增加煤的氧吸收和质量增加阶段的活化能,在煤的自燃初期具有抑制作用。
更新日期:2019-09-12
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