原油及渣油中Fe含量分布及其存在形态

Content Distribution and Existing Form of Fe in Crude and Residual Oil

测定了委内瑞拉、克拉玛依、辽河和大港4种原油及其常压渣油（AR）、减压渣油（VR）中的Fe含量，并分析了原油及其AR、VR的四组分中的Fe含量分布和原油及其AR、VR中Fe的存在形态及分布。结果表明，从原油、AR到VR，随着油样沸程的升高，其Fe含量不断增加，并且主要富集在VR中；Fe主要分布于胶质、沥青质组分中，并且随着原油馏分沸程的升高，沥青质中的Fe含量分布不断增加；原油及渣油中的Fe主要是油溶性Fe，占总Fe质量分数的75％～99％，且同一种原油中油溶性Fe的含量随着该原油馏分沸程的升高而增加，原油及其AR、VR中石油酸Fe的含量与原油的酸值大小有关，卟啉Fe和非卟啉Fe含量之和随着原油的重质化而增加。

The Fe contents in Venezuela, Karamay, Liaohe, Dagang crude oil and their corresponding atmospheric residue （AR）, vacuum residue （VR） were determined. And the Fe content distribution in SARA and Fe existing forms and their distribution in crude oil, AR and VR were also studied. The results showed that the Fe content in crude oil, AR and VR increased with the boiling range rising, and that the Fe was mainly concentrated in VR. The Fe were mainly concentrated in resin and asphaltene of SARA components, and the distribution of Fe content in asphaltene increased obviously with the boiling range rising of crude oil fractions. The Fe in crude oil and residue was mainly oil-soluble Fe, which was of 75%- 99% proportion of total Fe and increased with the boiling range rising of the crude oil and their corresponding AR, VR. The petroleum acid Fe content was related to the acid value of crude oil. With the crude oil becoming heavier, the porphyrine and non-porphyrine Fe contents increased.