Detailed Elemental Compositions of Emulsion Interfacial Material versus Parent Oil for Nine Geographically Distinct Light, Medium, and Heavy Crude Oils, Detected by Negative- and Positive-Ion Electros

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• 作者：Lateefah A. Stanford ; Ryan P. Rodgers ; Alan G. Marshall ; Jan Czarnecki ; Xin A. Wu ; Shawn Taylor
• 刊名：Energy & Fuels
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：21
• 期：2
• 页码：973 - 981
• 全文大小：856K
• 年卷期：v.21,no.2(March 2007)
• ISSN：1520-5029

文摘

By means of electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESIFT-ICR MS), we identify nonvolatile polar acidic and basic emulsion stabilizers in nine geographically distinctlight, medium, and heavy oils. Although oil class distributions are unique, oils of similar API specific gravityexhibit similar relative abundances for the O₂ and O₄S classes. Heavy oils are high in O₂ and low in low inO₄S. The light oils follow the opposite trend. However, independent of parent oil O₂ and O₄S class abundances,O₂ and O₄S species preferentially adsorb and are the two most abundant classes in the emulsion interfacialmaterial. Negative-ion nitrogen-containing classes do not have a high affinity for emulsion interface adsorption.However all positive-ion nitrogen-containing species adsorb to the oil/water interface.