石油的微生物降解过程中胶质沥青质的分子结构变化

The Molecular Structure Changes of Resin and Asphaltene during the Degradation of Crude Oil

红外光谱法可以用于石油样品中许多基团的鉴定以及某些基团含量的测定,由于其快速和简便,因而在石油分析中应用很广。在微生物降解石油过程中,一般采用红外光谱法研究其中胶质和沥青质的分子结构变化。从红外光谱图中可以看出,胶质在降解过程中有CH3—、C=O、C=N、S=O键的振动吸收,分子结构中C=N、C=O、S=O基团在逐渐减少,而—OH基团明显增加。沥青质在降解过程中芳香C=C伸缩振动和CH3—反对称变形振动减弱,—OH和C=O基团的吸收峰增高,羧酸类组分明显增加。总体上,在微生物降解过程中,胶质的分子结构变化比沥青质明显。

Due to IR spectrum's fast and easy application of oil analysis,it can be used to identify the sample of many groups,as well as the determination of some groups. In the experiments of the microbial degradation,we generally use infrared IR spectra to study the resin and spectra's molecular structural changes. From the infrared spectra,it can be seen that resin containing vibration absorption of CH3—,CO,CN,CS,and the CN,CO,SO groups of molecular structure were gradually reduced in degradation process,but -OH groups significantly increased. And asphaltene mainly pahs condensation,—OH and CO groups increased,carboxylic acid components increased,aromatic CC telescopic vibration and CH3— antisymmetry deformation vibration weakened. In general,during the microbial degradation,the changes of resin were more obviously than asphaltene,and the new substance was formed in both of them.