Molecular Composition Characterization of Olefins in Coal Tar Liquids and Their Derived Distillates
The molecular level characterization of olefins in coal tar was carried out in this study.The molecular distribution of the olefins in the low temperature coal tar(LTCT)and high temperature coal tar(HTCT)was revealed by the gas chromatography-mass spectrometry(GC-MS)and Ag+complexation high-resolution mass spectrometry(HR MS),and the types and carbon number distributions of olefins in the range of C12 to C40 were obtained.The results show that the LTCT contains more olefins than HTCT.In addition,the olefin-rich LTCT was cut into light fractions(≤360 ℃)and atmospheric residue fractions(＞360 ℃)by distillation,and different distillates were studied for detail molecular composition information.It is found that the light fraction has the highest olefin content in the temperature interval of 260-320 ℃,and atmospheric residue distillates also have abundant olefins.Then olefins composition distribution were obtained for each distillated fraction.This paper provides the detailed qualitative and semi-quantitative information of olefins in coal tar and its distillates,as well as the molecular-level basis for the target olefin separation and the efficient clean utilization of coal tar.
coal tarolefinAg+complexationhigh-resolution mass spectrometrysemi-quantitative analysis
万方数据
维普
