Determination of Structural Building Blocks in Heavy Petroleum Systems by Collision-Induced Dissociation Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

被引:60
作者
Qian, Kuangnan [1 ]
Edwards, Kathleen E. [1 ]
Mennito, Anthony S. [1 ]
Freund, Howard [1 ]
Saeger, Roland B. [1 ]
Hickey, Karl J. [1 ]
Francisco, Manny A. [1 ]
Yung, Cathleen [1 ]
Chawla, Birbal [1 ]
Wu, Chunping [1 ]
Kushnerick, J. Douglas [1 ]
Olmstead, William N. [1 ]
机构
[1] ExxonMobil Res & Engn Co, Annandale, NJ 08801 USA
关键词
SUPERCRITICAL-FLUID CHROMATOGRAPHY; STORAGE-ASSISTED DISSOCIATION; RESOLUTION; DIESEL; IDENTIFICATION; SPECIATION; SPECTRUM;
D O I
10.1021/ac300544s
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Collision-induced dissociation Fourier Transform ion cyclotron resonance mass spectrometry (CID-FTICR MS) was developed to determine structural building blocks in heavy petroleum systems. Model compounds with both single core and multicore configurations were synthesized to study the fragmentation pattern and response factors in the CID reactions. Dealkylation is found to be the most prevalent reaction pathway in the CID. Single core molecules exhibit primarily molecular weight reduction with no change in the total unsaturation of the molecule (or Z-number as in chemical formula CcH2c+ZNnS5OoVNi). On the other hand, molecules containing more than one aromatic core will decompose into the constituting single cores and consequently exhibit both molecular weight reduction and change in Z-numbers. Biaryl linkage, C-1 linkage, and aromatic sulfide linkage cannot be broken down by CID with lab collision energy up to 50 eV while C-2+ alkyl linkages can be easily broken. Naphthenic ring-openings were observed in CID, leading to formation of olefinic structures. Heavy petroleum systems, such as vacuum resid (VR) fractions, were characterized by the CID technology. Both single-core and multicore structures were found in VR. The latter is more prevalent in higher aromatic ring classes.
引用
收藏
页码:4544 / 4551
页数:8
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