Total acid number

The total acid number (TAN) is a measurement of acidity that is determined by the amount of potassium hydroxide in milligrams that is needed to neutralize the acids in one gram of oil.[1] It is an important quality measurement of crude oil.

The TAN value indicates to the crude oil refinery the potential of corrosion problems. It is usually the naphthenic acids in the crude oil that cause corrosion problems. This type of corrosion is referred to as naphthenic acid corrosion (NAC).

TAN values may also be useful in other industries where oils are used as lubricants to determine oxidation and the subsequent corrosion risk to machinery.[1]

TAN value can be deduced by various methods, including

See Also

References

  1. 1 2 "Lab Services > TAN test". CPI Engineering. Retrieved 2 June 2014.
  2. Jingyan, L.; Xiaoli, C.; Songbai, T. (2012). "Research on Determination of Total Acid Number of Petroleum Using Mid-infrared Attenuated Total Reflection Spectroscopy". Energy & Fuels 26 (9): 5633. doi:10.1021/ef3002372.
  3. "Petroleum Characteristics and Analysis". ASDI. Retrieved 2 June 2014.
  4. Sjöblom, J.; Aske, N.; Harald Auflem, I.; Brandal, Ø.; Erik Havre, T.; Sæther, Ø.; Westvik, A.; Eng Johnsen, E.; Kallevik, H. (2003). "Our current understanding of water-in-crude oil emulsions". Advances in Colloid and Interface Science. 100-102: 399. doi:10.1016/S0001-8686(02)00066-0. p. 404

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