Analysis of the Volatiles Generated During the Selby-Noack Test by 31P NMR Spectroscopy

Bosch, RJ van den; Fee, D. S.; Selby, TW

doi:10.1520/stp12009s

Elemental Analysis of Fuels and Lubricants: Recent Advances and Future Prospects 2005

DOI: 10.1520/stp12009s

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Analysis of the Volatiles Generated During the Selby-Noack Test by 31P NMR Spectroscopy

RJ van den Bosch¹,

D. S. Fee²,

TW Selby³

Abstract: A series of engine oil samples collected during a study of their Phosphorus Emission Index values were analyzed by 31 P Nuclear Magnetic Resonance Spectroscopy. (The PEI analyses themselves were presented in an associated paper [1]). NMR spectra were generated to obtain and explain the mode of formation and identity of the phosphorus-containing species in the volatiles generated during the Selby-Noack volatility test and compare these species to those found in both the fresh oil and the residual oil remaining … Show more

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Phosphorus Additive Chemistry and Its Effects on the Phosphorus Volatility of Engine Oils

Selby¹,

Bosch²,

Fee³

2005

Elemental Analysis of Fuels and Lubricants: Recent Advances and Future Prospects

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The most widely used and effective anti-wear/anti-oxidation additives in engine oil contain phosphorus that can partially volatilize during engine operation. Unfortunately, volatile phosphorus in the exhaust stream degrades the function of the exhaust catalyst in reducing air pollution. Earlier studies in a special volatility bench test using the Phosphorus Emission Index have shown that phosphorus volatility is not related to engine oil volatility or to phosphorus content in the unused engine oil. At the time, it had been speculated that this unexpected lack of correlation with initial phosphorus concentration could be explained by 1) the effects of other engine oil additives and/or 2) variations in the phosphorus additive chemistry. The first speculation was relatively recently confirmed by taxi fleet studies of catalyst degradation by phosphorus-containing oils by the Ford Motor Company. It remained to determine if differences in phosphorus additive chemistry were also a factor, and this is the subject of the present study.

show abstract

Phosphorus Additive Chemistry and Its Effects on the Phosphorus Volatility of Engine Oils

Selby¹,

Bosch²,

Fee³

2005

Elemental Analysis of Fuels and Lubricants: Recent Advances and Future Prospects

View full text Add to dashboard Cite

show abstract

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Analysis of the Volatiles Generated During the Selby-Noack Test by 31P NMR Spectroscopy

Cited by 1 publication

References 13 publications

Phosphorus Additive Chemistry and Its Effects on the Phosphorus Volatility of Engine Oils

Phosphorus Additive Chemistry and Its Effects on the Phosphorus Volatility of Engine Oils

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