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化工学报  2015 

油页岩低温热解过程中轻质气体的析出特性

DOI: 10.11949/j.issn.0438-1157.20141312, PP. 1104-1110

Keywords: 油页岩,热解,轻质气体,析出特性

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Abstract:

为研究油页岩低温热解过程中轻质气体的析出特性,在热重-红外-质谱三联机上对国内有代表性的4个地区(FS、HD、MM和NM)油页岩以20℃·min-1的升温速率进行了热解实验研究,考察了H2、H2O、CO、CO2、CH4和CnHm6种轻质气体的析出速率和累积产量随温度变化的规律。实验结果表明:油页岩轻质气体析出的温度范围在180~540℃;H2、CH4和CnHm的析出速率曲线大致相似,呈高斯分布,CO和CO2的析出速率则是先缓慢增加随后快速增加,达到最大值后又快速下降,直到析出结束,H2O的析出速率相对比较复杂,油页岩的内水、矿物质的结晶水和热解水在3个阶段析出,析出速率都是先增大,达到最大值而后减小。

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