State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China.
State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China.
Sci Total Environ. 2020 Aug 1;728:138828. doi: 10.1016/j.scitotenv.2020.138828. Epub 2020 Apr 20.
In this study, the co-pyrolysis characteristics of cow manure (CM) and Meihuajing bituminous coal (MHJ) blends were investigated in detail. The mass loss behavior and gas evolution characteristics of the blends were analyzed online by thermogravimetry-mass spectrometry (TG-MS), and kinetic analysis was performed. The results demonstrate that the addition of CM to the MHJ increases the reactivity of blends, indicating that interaction between the CM and MHJ occurred during co-pyrolysis. For conventional gases, the release order of gases during CM and MHJ blend pyrolysis is HO, CO, CO, CH, H. For sulfur-containing gases, with increasing proportion of CM, the emissions of HS, COS, and CHS increase and that of SO decrease, and the release temperature interval shifts to lower directions. The Coats & Redfern model was used, an increase of activation energy with CM addition was observed. The optimum blending ratio based on the lowest activation energy is CM:MHJ = 1:3 and the activation energy is 41.9 kJ/mol.
在这项研究中，详细研究了牛粪（CM）和煤沥青（MHJ）混合物的共热解特性。通过热重-质谱联用仪（TG-MS）在线分析了混合物的质量损失行为和气体演化特性，并进行了动力学分析。结果表明，CM 的添加增加了混合物的反应性，表明在共热解过程中CM 和 MHJ 之间发生了相互作用。对于常规气体，在 CM 和 MHJ 混合物热解过程中气体的释放顺序为 HO、CO、CO、CH、H。对于含硫气体，随着 CM 比例的增加，HS、COS 和 CHS 的排放量增加，SO 的排放量减少，释放温度区间向低温方向移动。使用了 Coats & Redfern 模型，观察到随着 CM 添加，活化能增加。基于最低活化能的最佳混合比为 CM:MHJ=1:3，活化能为 41.9 kJ/mol。
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