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对龙口油页岩在干馏反应器中进行有氧干馏,从200至500℃范围内每隔50℃分别对油页岩进行有氧干馏,运用FTIR技术对氧化后的系列油页岩半焦的中各官能团组成分析;并采取峰拟合手段和红外差减光谱定量地分析了随着温度的升高油页岩中含氧官能团、脂肪族及芳香族主要基团的变化规律。结果表明,油页岩有氧干馏过程中主要活性基团均发生不同程度的变化,特别是羰基在油页岩中含量呈现先增后减和脂肪族基团的减少的变化趋势。同时也表明油页岩有氧干馏过程中氧气的参与不仅能与油页岩发生氧化反应,释放出热量,降低热载气温度,还能够促使油母质发生裂解,释放出脂肪烃,降低反应的活化能。
The Longkou shale was subjected to aerobic distillation in a dry distillation reactor. The oil shale was subjected to aerobic distillation from 200 to 500 ℃ every 50 ℃. FTIR was used to characterize the oxidation of the oil shale semi-coke The composition of each functional group was analyzed. The variation of oxygen-containing functional groups, aliphatic and aromatic main groups in oil shale with temperature were quantitatively analyzed by means of peak fitting and infrared difference subtraction spectroscopy. The results show that the major reactive groups of oil shale undergo various degrees of change in the process of aerobic retorting. In particular, the content of carbonyl in oil shale increases first and then decreases and the aliphatic groups decrease. At the same time, it also shows that the oxygen participation in oil shale aerobic retorting can not only oxidize with oil shale, release heat, reduce the temperature of hot carrier gas, but also promote the cracking of kerogen, release aliphatic hydrocarbon and reduce the reaction activation energy.