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dc.contributor.authorSautermeister, F.A.*
dc.contributor.authorPriest, Martin*
dc.contributor.authorFox, M.F.*
dc.date.accessioned2016-11-28T15:14:43Z
dc.date.available2016-11-28T15:14:43Z
dc.date.issued2014
dc.identifier.citationSautermeister FA, Priest M and Fox MF (2014) FTIR lubricant analysis: Concentration of dispersed sulphuric acid. Industrial Lubrication and Tribology. 66(4): 555-559.
dc.identifier.urihttp://hdl.handle.net/10454/10782
dc.descriptionNo
dc.description.abstractThis paper aims to establish the acid concentration of finely dispersed droplets in hydrocarbon oils. Small quantities of aqueous sulphuric acid (H2SO4) were found to be trapped within hydrocarbon shells, making them inaccessible for concentration evaluation by titration. Fourier transform infrared spectroscopy (FTIR) used in the attenuated total reflection mode (ATR; FTIR-ATR) was applied to study the reaction products of squalane, C30H62, and an API Group I base oil with various concentrations of aqueous H2SO4. The absorbance comparison usually used for estimating acid concentrations was found to fail when small quantities of acid are trapped in the reaction product. It was found that the peak shift and changes in absorbance found for various pure aqueous acid concentrations were useful to establish the remaining concentration of the trapped H2SO4. This paper fulfils the identified need to study acid dissociation-dependent peak shifts of H2SO4 to find the acid concentration of finely dispersed droplets in hydrocarbon oils.
dc.relation.isreferencedbyhttps://doi.org/10.1108/ilt-07-2012-0065
dc.subjectFtir
dc.subject; Emulsion
dc.subject; Lubricant degradation
dc.subject; Marine diesel engine
dc.subject; Sulphuric acid
dc.subject; Acid dissociation
dc.subject; Infrared-spectroscopy
dc.subject; Water structure
dc.subject; Solutes
dc.titleFTIR lubricant analysis: Concentration of dispersed sulphuric acid
dc.status.refereedYes
dc.typeArticle
dc.type.versionNo full-text in the repository


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