Determination of Total Acidic Number of Motor Oils of Diesels and Cars and Its Correlation to the Mileage

Document Type : Research Article

Authors

1 Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, I.R. IRAN

2 Hormozgan Province Gas Company, Sixth Zone of Gas Transfer, Bandar Abbas, I.R. IRAN

Abstract

Oils are a major group of lubricants which are used to reduce the amount of friction and easier movement of two in contact surfaces that are extracted from crude oil. One of the most important applications of lubricants is the engine oil of vehicles. In this research, the Total Acidic Number (TAN) of various types of motor, gearbox, hydraulic, and brake oils were measured in different mileages. The oils were selected both for cars and diesel vehicles from a range of manufacturers. The results showed that the average TAN is 1.4 and 1.7 (mg KOH)/g for car and diesel motor oils, respectively. Also for most of the oils, there is a direct relationship between TAN and the mileage of the car. As for an average of each 5,000 km, TAN increases 0.7 (mg KOH)/g for car oils and 0.3 (mg KOH)/g  for diesel oil vehicles. Moreover, it was found that the TAN of brake oil is zero and do not change with mileage. Besides, TAN of the oil taken from the engine and from the inside of the oil filter is the same.

Keywords

Main Subjects

References

[1] Lansdown A.R., "Lubrication: a practical guide to lubricant selection", Second edn., Pergamon Press Ltd., Oxford, England (1982) [1-50].
[2] زمانی،"مجموعه مقالات سمینار شناخت و کاربرد روغنهای روانساز صنعتی"، شرکت نفت بهران با همکاری موسسه انتشارات جهاد دانشگاهی، تهران، ص.ص. 177و176 (1365).
[3] Bloch H.P., "Practical lubrication for industrial facilities", Second edn., Fairmont Press, New York, USA, (2009) [396-397].
[4] Cox R.A., Acids and bases, solvent effects on acid-base strength,  Angew. Chem. Int. Ed., 125 (30): 7790-7795 (2013).
[5] DeKlerk A., "Fischer-Tropsch Refining", Wiley-VCH Verlag & Co. KGaA, Weinheim, Germany, (2011) [25,26].
[6] Becker J.R., "Crude oil waxes, emulsions, and asphaltenes", Pennwell Publishing Company, Tulsa, USA, (1997) [26-29].
[7] کوچک­ زاد، م. ت.،"اصول پالایش نفت خام" ، انتشارات ادبستان- جهان نو، تهران، ص. ص. 22-20 (1387).
[8] Fedele L., "Methodologies and Techniques for Advanced Maintenance", Springer-Verlag, London, UK, (2011) [105].
[9] Hamblin P., Rapenne-Jacob I., Reyes-Gavilan J., Rohrbach P., Standard test methods for TAN assessment and modifications, Tribol. Lubr. Technol., Society of Tribologists and Lubrication Engineers. Retrieved May 16, 2018 from HighBeam Research, 40-46 (2004).
[10] Van De Voort F.R., Pinchuk D., Davies M., Taghizadeh A., "FTIR acid and base number analyses: their potential to Replace ASTM Methods", Proceedings of the JOAP International Monitoring Conference, Canada, 4,5 (2002). 
[11] Jones D.M., Watson W., Meredith W., Chen M., Bennett b., Determination of naphthenic acids in crude oils using nonaqueous ion exchange solid-phase extraction, Anal. Chem., 73 (3): 703-707 (2001). 
‏[12] Dalmia A., "Analysis of naphthenic acids in filtered oil sands process wate (OSPW) using LC/TOF with no sample preparation", Perkin Elmer Application Note, Waltham, USA (2013) [2,3].
 [13] Standard I., "Standard test method for acid number of petroleum products by potentiometric titration-ASTM D 664, ASTM International", ASTM International,USA (2011) [1-3]. 
[14] Saad O.M., Gasmelseed G.A., Hamid A.H., Separation of naphthenic acid from sudanese crude oil using local activated clays, J. Appl. Ind. Sci., 2(1): 14-18 (2014).
[15] Hau J.L., Yepez, O.J., Torres, L.H., Vera, J.R., Measuring naphthenic acid corrosion potential with the Fe powder test, Rev. Metal Madrid, Extr: 116-123 (2003).
[‏[16] ASTM International, "Standard test method for acid and base number by color-indicator titration", ASTM International, USA (2012).
[17] Bian, Y., "Non-aqueous phase titration for total acid number of crude oil", Rice University Press, USA, (2009) [3, 25].

Files

Share

How to cite

Statistics