岩沥青中钒卟啉化合物分子组成分析

以四川广元岩沥青为研究对象,分离出不同性质的亚组分,通过元素分析、紫外可见光谱、高温气相色谱、高分辨率质谱等手段研究钒卟啉类化合物的分子组成,并与塔河稠油中的卟啉化合物进行对比。结果表明,岩沥青中含有大量的金属元素,钒元素含量高达3888μg/g,检测到大量钒卟啉类化合物,以C28-C34初卟啉(ETIO)和脱氧叶红初卟啉(DPEP)为主;与塔河原油相比,DPEP具有明显的相对优势,说明尽管岩沥青具有很高的分子缩合度,但其地质热成熟度较低。青川岩沥青储量巨大、金属含量丰富,具有重要的潜在利用价值。

Molecular composition of vanadyl porphyrins in the gilsonite

A gilsonite from Qingchuan (Sichuan province, China) was separated into several fractions and characterized by various techniques. The vanadyl porphyrins were determined by inductively coupled plasma optical emission spectrometer, ultraviolet-visible, high-temperature gas chromatography atomic emission detection, and positive-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry. The results show that the gilsonite contains a large amount of metal elements, especially the vanadium content is as high as 3888 μg/g. A large number of vanadyl porphyrins are detected, in which the deoxophylloerythroetio porphyrins are the most abundant, indicating high molecular condensation but low thermal maturity. The huge reserves and high metal content imply important utilization value for this natural source.