Quantitative Nuclear Magnetic Resonance Spectroscopy as a Tool To Evaluate Chemical Modification of Deep Hydrotreated Recycled Lube Oils

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• 作者：John V. Muntean ; Joseph A. Libera ; Seth W. Snyder ; Tianpin Wu ; Donald C. Cronauer
• 刊名：Energy & Fuels
• 出版年：2013
• 出版时间：January 17, 2013
• 年：2013
• 卷：27
• 期：1
• 页码：133-137
• 全文大小：213K
• 年卷期：v.27,no.1(January 17, 2013)
• ISSN：1520-5029

文摘

The applications of ¹H and ¹³C nuclear magnetic resonance (NMR) and two-dimensional ¹H/¹³C NMR spectroscopy have been shown to be useful techniques for the qualitative and quantitative characterization of hydrotreated recycled lube oils. The addition of hydrogen to aromatic and alkene hydrocarbons can be quantitatively and selectively measured. The decrease of oxygen/nitrogen/sulfur species can also be inferred from the reduction of specific resonances in the NMR spectra. Treated recycled lube oil was subsequently hydrotreated with Pd catalysts deposited by either atomic layer deposition (ALD) or incipient wetness impregnation (IWI) on a SiO₂/Al₂O₃ support. In both cases, much lower hydrogenation temperatures were required than had been observed with typical NiMo or CoMo on Al₂O₃. In addition, the ALD-deposited catalyst was more effective for the reduction of aromatics and heteroatom components than the IWI catalyst. The lube oil fractions were of high purity (low aromaticity and low heteroatom content) even at low reaction severity.