随着一次能源不断消耗，油页岩以其丰富的储量备受关注，同时一次能源利用加剧了CO2排放，导致不同程度的环境问题，研究表明CO2可用于制取瓦斯气，因此，为了探究CO2气氛对油页岩热解的影响，采用热重-红外联用技术探究5种不同混合气氛（CO2与N2不同比例混合）及不同升温速率下油页岩的热解失重情况，采用固相傅里叶红外光谱仪对固相产物进行检测，并运用peakfit软件将上述所得气/固相傅里叶红外光谱进行分峰拟合分析。结果表明：随CO2浓度增加，油页岩热解总失重率呈微弱的先增后减趋势，质量变化速率峰值向高温区域移动，增大油页岩热解第3阶段的失重率，过量CO2会抑制油页岩热解；随升温速率提高，油页岩热解总失重率减小；相同条件下，适量浓度CO2使CnHm、CH4生成量增加，过量CO2会抑制其生成；对半焦而言，CO2气氛使半焦中碳酸盐类振动强度减小，部分官能团的热解温度发生改变；相同热解条件下，CO2气氛下半焦中官能团种类较多、强度较高，热解反应向高温区移动。

At present, with the continuous consumption of primary energy, oil shale has come into people′s sight with its rich reserves. At the same time, the use of primary energy has aggravated the emission of CO2, resulting in different degrees of environmental problems, and researches have shown that CO2 can be used to produce gas. Therefore, in order to explore the effect of CO2 atmosphere on oil shale pyrolysis, thermogravimetric infrared spectroscopy (TGA-FTIR) was used in this paper to explore the pyrolysis weight loss of oil shale under five different mixing atmospheres (CO2 and N2 mixed in different proportions) and different heating rates. Solid-phase Fourier infrared spectrometer was used to detect the solid-phase products. Peakfit software was used to perform peak fitting analysis of gas/solid phase Fourier infrared spectra. The results show that the total weight loss rate of oil shale pyrolysis shows a weak trend of first increasing and then decreasing with the increase of CO2 concentration, which makes the peak of weight loss rate move to the high temperature region, and increases the weight loss rate of oil shale pyrolysis in the third stage. Excessive CO2 inhibits the pyrolysis of oil shale. With the increase of heating rate, the total weight loss rate of oil shale pyrolysis decreases. Under the same conditions, moderate CO2 concentration increases the production of CnHm and CH4, while excessive CO2 inhibits their production. For semi-coke, the vibration intensity of carbonates in CO2 atmosphere decreases, and the pyrolysis temperature of some functional groups changes. Under the same pyrolysis conditions, there are more kinds of functional groups and higher intensity in the char under CO2 atmosphere, and the pyrolysis reaction moves to the high temperature region.

0 引言

1 试验

   1.1 样品制备

   1.2 试验仪器与流程

2 结果与讨论

   2.1 热重试验

   2.2 傅里叶红外光谱

3 结论