INFLUENCE OF NITROGEN AND SULFUR COMPOUNDS ON LIGHT STABILITY OF LUBE BASE OIL

Abstract

Abstract: The sediments deposited from lube base oil were analyzed by means of elemental analysis and FT-ICR MS, and the model system was constructed to study the influence of nitrogen and sulfur compounds on the light stability of lube base oil by the addition of quinoline, indole and dibenzothiophene in blank sample. The results showed that the content of sulfur and nitrogen in sediments was 2 000 times more than that in the lube base oil, and the sediment was mainly composed of high condensated nitrogen and oxygen compounds. Nitrogen compounds on the light stability of lube base oil was very significant, and the influence of non-basic nitrogen compounds was far greater than the influence of basic nitrogen compounds. Thiophene sulfur compounds had small influence on the light stability of lube base oil, and low content of thiophenic sulfur compounds made the light stability of lube base oil worse, while high content of thiophenic sulfur compounds could inhibit the light stability of lube base oil deterioration.

Key words: lube base oil, sediments, basic nitrogen, non-basic nitrogen, sulfur compound, light stability

CLC Number:

References

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