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Citation: SONG Chunxia, WANG Wei, LIU Zelong, LIU Yingrong, CAI Xinheng. Development and application of two-dimensional liquid chromatography for the analysis of polycyclic aromatic sulfur heterocycles in heavy oil[J]. Chinese Journal of Chromatography, ;2019, 37(7): 750-758. doi: 10.3724/SP.J.1123.2019.01014 shu

Development and application of two-dimensional liquid chromatography for the analysis of polycyclic aromatic sulfur heterocycles in heavy oil

Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China

Received Date: 11 January 2019

Fund Project: Research Project of Research Institute of Petroleum Processing, SINOPEC (No. R16023).

A two-dimensional liquid chromatographic (2D LC) system was developed for the analysis of polycyclic aromatic sulfur heterocycles (PASHs) in heavy oil. The first dimension is a ligand-exchange chromatographic column packed with a palladium chloride/silica (PdCl₂-SiO₂) stationary phase, while the second dimension is a Spherisorb-NH₂ column. The PASHs in vacuum gas oil were enriched online, and polycyclic aromatics hydrocarbons (PAHs) were separated according to their aromatic ring numbers. These separated fractions were analyzed by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), and detailed molecular characterization of PASHs and PAHs was achieved. Typical molecular structures of PASHs and PAHs in these fractions could be provided, and the side chain as well as the core structures were predicted. It is significant for the feedstocks selection and optimization of the hydrodesulfurization process by using these molecular characterization information.
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