神木煤显微组分加氢热解的TG/MS研究
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摘要: 在TG-151热天平上考察了神木煤显微组分加氢热解的热重特性;用质谱对加氢热解气体进行了在线检测分析。结果表明,镜质组比惰质组有较高的挥发分收率和最大失重速率;较低的起始热解温度和热解峰温。镜质组有较高的C1~C4轻质烃类和C6~C8芳香烃类收率,原煤居中,惰质组最少;镜质组比惰质组有较高的水生成, 加氢热解过程中各种烃类和水的逸出都高于相应热解下的。Abstract: The hydropyrolysis characteristics of Shenmu coal and its macerals were investigated using TG-151 thermobalance, and the evolved gases were on-line analyzed by Mass Spectroscopy. The results show that vitrinite has higher volatile yield, maximum weight loss rate and lower peak temperature. Vitrinite produces more C1~C4 lighter hydrocarbons and C6~C8 aromatic hydrocarbons than inertinite during hydropyrolysis, suggesting that vitrinite has higher aliphatic hydrogen content and lower aromaticity. Compared with inertinite, vitrinite has a higher water yield, which is consistent with that the vitrinite has higher phenolic-OH content. The difference in the evolved gases and water between pyrolysis and hydropyrolysis shows the effect of hydrogenation and hydrocracking during hydropyrolysis.
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Key words:
- macerals /
- hydropyrolysis /
- evolved gases /
- TG-MS
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