论文部分内容阅读
以窑街煤田天然CO2注入煤层并驱替煤层CH4为研究背景,通过在距离CO2注入点不同距离处连续采取煤样,对系列煤样进行红外光谱分析,结果显示:红外光谱谱图波数在2 800～3 000、2 270～2 413、1 000～1 200 cm-1区域吸收峰值发生了不同程度的变化。又对2个煤矿的超临界CO2处理前后的煤样进行红外光谱分析,上述波数的吸收峰强度也发生变化,而且都是处理后的煤样吸收峰强度低一些,进一步证实超临界CO2在运移过程中确实能从煤基质中萃取了脂肪族芳香族碳氢化合物及一部分矿物质。
Taking the natural CO2 injected into the coal seam of Yaokuan coalfield and displacing CH4 from the coal seam, the coal samples were continuously taken at different distances from the CO2 injection point to analyze the infrared spectra of the coal samples. The results showed that the wave number of the infrared spectrum was between 2 The absorption peaks of 800 ~ 3000, 2702 ~ 4131, 1000 ~ 1200 cm-1 changed in different degrees. In addition, the infrared spectra of coal samples before and after the supercritical CO2 treatment of two coal mines were also analyzed. The intensity of the absorption peaks of these wavenumbers also changed. Both of them were lower in the intensity of the treated coal samples, which further confirmed that the supercritical CO2 transport Aliphatic aromatic hydrocarbons and some minerals are indeed extracted from the coal matrix during the shift.