Characterization of Nitrogen Compounds in Coker Heavy Gas Oil and Its Subfractions by Liquid Chromatographic Separation Followed by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
Characterization of Nitrogen Compounds in Coker Heavy Gas Oil and Its Subfractions by Liquid Chromatographic Separation Followed by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
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DOI：
10.1021/ef101328n
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发表时间：
2011-01
期刊：
影响因子：
5.3
通讯作者：
Xiaochun Zhu;Quan Shi;Yahe Zhang;Na Pan;Chunming Xu;K. Chung;Suoqi Zhao
中科院分区：
文献类型：
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作者：
Xiaochun Zhu;Quan Shi;Yahe Zhang;Na Pan;Chunming Xu;K. Chung;Suoqi Zhao
将焦化重瓦斯油（CHGO）分离为饱和烃、芳烃、胶质和沥青质（SARA）馏分。通过高效液相色谱（HPLC）将树脂级分分离成6个亚级分。采用电喷雾电离（ESI）傅立叶变换离子回旋共振质谱（FT-ICR MS）对CHGO及其亚组分进行了表征。质谱显示碱性和中性含氮化合物的质量范围分别为200 - 450和160 - 400 Da。在正离子光谱中，指定了五种氮类物质，N1、N2、N1 O 1、N1 O2和N1 S1。在负离子光谱中，分配了六种氮类物质，N1、N2、N1 O 1、N1 O2、N2 O 1和N1 S1。在所鉴定的含氮化合物中，N1类化合物占优势。N1类物质在树脂级分中富集。N2类物质可能是两性分子，并富集在沥青质馏分中。树脂亚组分中含氮化合物的组成随温度的升高而变化。
A coker heavy gas oil (CHGO) was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The resin fraction was separated into six subfractions by high-performance liquid chromatography (HPLC). The CHGO and its subfractions were characterized by electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The mass spectra showed that the mass range of basic and neutral nitrogen compounds was 200−450 and 160−400 Da, respectively. Five nitrogen class species, N1, N2, N1O1, N1O2, and N1S1, were assigned in the positive-ion spectrum. Six nitrogen class species, N1, N2, N1O1, N1O2, N2O1, and N1S1, were assigned in the negative-ion spectrum. Among the identified nitrogen compounds, the N1 class species was dominant. The N1 class species were enriched in the resin fraction. The N2 class species are likely amphoteric molecules and were enriched in the asphaltene fraction. The composition of nitrogen compounds in the resin subfractions varied signifi...