STP1468

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

    Published: Jan 2005


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    Abstract

    A series of engine oil samples collected during a study of their Phosphorus Emission Index values were analyzed by 31P 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 to compare these species to those found in both the fresh oil and the residual oil remaining after the volatility test.

    Keywords:

    phosphorus volatility, exhaust catalyst, exhaust emissions, ZDDP, zinc dithiophosphates, Phosphorus Emission Index, PEI, 31, P NMR, NMR spectroscopy


    Author Information:

    Bosch, RJ
    Technical Service Fellow and Technology Fellow, Astaris LLC, Webster Groves, Missouri

    Fee, DC
    Technical Service Fellow and Technology Fellow, Astaris LLC, Webster Groves, Missouri

    Selby, TW
    Director of R&D, Savant, Inc., Midland, Michigan


    Paper ID: STP12009S

    Committee/Subcommittee: D02.03

    DOI: 10.1520/STP12009S


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