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通过对塔里木盆地煤及其显微组分进行以1K/min升温速率的开放体系热模拟实验(最高实验温度为1200℃),获得了煤岩与各显微组分气态产物产率与累计产量变化。对比分析了煤及其显微组分生成气态产物CH4、N2和CO变化特征,其中N2生成温度高于CH4和CO;H2生成时间与CH4相一致(说明了氢为烃类气体形成的关键因素)。煤及其显微组分生烃潜力具有壳质组>镜质组>煤>半丝质组≥丝质组的特征,说明煤岩生烃潜力主要由其显微组分控制;虽然壳质组在煤岩中含量很低,但生烃潜力高于其他显微组分。煤岩生成的N2具有双峰型特征,说明了前后峰N2具有不同来源,前者来源于无机矿物(如含铵粘土)的分解,后者来源于有机质热降解;显微组分生成N2主要为高温阶段,说明了显微组分在分离过程中可能造成部分无机矿物的损失。
Through the thermal simulation of open system in the Tarim Basin at a heating rate of 1K / min (the maximum temperature is 1200 ℃), the yield and cumulative yield of gaseous products of coal and rock micro-components were obtained Variety. Comparative analysis of coal and its micro-components to produce gaseous products of CH4, N2 and CO changes, which N2 formation temperature is higher than CH4 and CO; H2 generation time and CH4 phase consistent with the description of hydrogen as a key factor in the formation of hydrocarbon gases ). The hydrocarbon generation potential of coal and its micro-component has the characteristics of chitin group> vitrinite> coal> semi-silk group> siliceous group, indicating that the hydrocarbon generation potential of coal and rock is mainly controlled by its micro-component; The content of coal is low, but the hydrocarbon potential is higher than other microscopic components. The N2 formed by coal and rock has bimodal characteristics, indicating that the front and back peaks N2 have different sources, the former comes from the decomposition of inorganic minerals (such as ammonium-containing clays), and the latter comes from the thermal degradation of organic matter. The N2 High temperature stage, indicating that the microscopic components in the separation process may cause some of the loss of inorganic minerals.