【摘要】 应用热重-质谱(TG-MS)联用技术对风化煤(WC)及其腐植酸提取后残渣(WCR)的热解行为进行了研究,分析了非烃类(H2、H2O、CO和CO2)、低碳烃类(CH4、C3H6和C3H7)和芳烃类(C6H6)的实验结果,并利用Coast-Redfern积分法对其热解和烃类生成动力学进行了探讨,获得了热解过程和烃类生成动力学参数。结果表明:热解过程中风化煤的质量损失率(38.9%)略大于其腐植酸提取后残渣(36.6%);除CO和CO2外,残渣中非烃类、低碳烃类和芳烃类产物的逸出量都稍微或显著多于风化煤中各类组分的逸出量。用Coast-Redfern积分法求得的动力学参数很好地解释了这一结果。更多还原

【Abstract】 The pyrolysis behavior of weathered coal(WC) and its residues extracted with humic acid were investigated using a quadrupole thermogravimetry mass spectrometer(TG-MS). The experimental results of non-hydrocarbons(H2, H2 O, CO and CO2), low carbon hydrocarbons(CH4, C3H6 and C3H7), and aromatic hydrocarbons(C6H6) were studied. The pyrolysis process and hydrocarbons generation kinetics were analyzed by the Coast-Redfern integration method and its kinetic parameters were obtained furtherly. The results indicate that the weight loss(38.9%) resulting from the pyrolysis process of weathered coal is higher than the residues(36.6%). However, in addition to CO and CO2, the flux of non-hydrocarbon, hydrocarbon and aromatic products in residues are slightly or significantly higher than the various components emitted from weathered coal. The kinetic parameters likely explain these results.更多还原