An investigation of corrosion and sedimentation in the air cooler tubes of benzene drying column in linear alkyl benzene production plant
- 15 Downloads
In this study the corrosion, sedimentation and subsequently choking in the air cooler tubes of benzene drying section in Bistoun Petrochemical Company, at Iran were investigated. The main reasons of failure were analyzed using standard failure analysis techniques such as visual checking, chemical and mechanical characterizations, metallurgical examinations employing optical microscopy in combination with scanning electron microscopy, X-ray fluorescence and X-ray diffraction analysis. The chemical analysis was used to determine the corrosion products. The accumulation of sediment and under-deposit corrosion has resulted in localized corrosion and perforation in the inner surface of the tubes. In addition, the erosion–corrosion accelerated the destruction of tubes. The microbial corrosion can happen because of high water content. The results showed that a combination of corrosion types has occurred. A new idea was proposed for the separation mechanism of low concentration of water from benzene in the process. Finally, the suggestions have been proposed for trouble shooting, preventing corrosion and clogging in the tubes of air cooler and subsequently avoiding production stop.
KeywordsAir cooler Erosion–corrosion Benzene Drying Section Under-deposit corrosion Choking
The author is grateful to thank Mr Amjad Sorourian, Hadi Azami and Kambiz Ghasemi from Bistoun Petrochemical Company for their technical guidance.
- Blackburn FE (2004) Non-bioassay techniques for monitoring MIC, paper 04580. CORROSION, NACE International, HoustonGoogle Scholar
- Deport R, Hero HM (1944) The Nalco guide to boiler failure analysis. Hill Inc., PhiladelphiaGoogle Scholar
- Ghanbarian M, Nabizadeh R, Mahvi AH, Nasseri S, Naddafi K (2011) Photocatalytic degradation of linear alkyl benzene sulfonate from aqueous solution by TiO2 nanoparticles. Iran J Environ Health Sci Eng 8:309–316Google Scholar
- Herro HM, Port RD (1993) The Nalco guide to cooling water system failure analysis. McGraw-Hill, New York CityGoogle Scholar
- Huang J (2013) Mechanistic study of under deposit corrosion of mild steel in aqueous carbon dioxide solution. Russ College of engineering and technology, Ohio University, OhioGoogle Scholar
- Javaherdashti R (2008) Microbiologically influenced corrosion: an engineering insight. Springer, LondonGoogle Scholar
- Lu Y, Wang J, Yu L, Kovarik L, Zhang X, Hoffman AS, Gallo A, Bare SR, Sokaras D, Kroll T, Dagle V, Xin H, Karim AM (2019) Identification of the active complex for CO oxidation over single-atom Ir–on–MgAl2O4 catalysts. Nat Catal 2:149–156. https://doi.org/10.1038/s41929-018-0192-4 CrossRefGoogle Scholar
- Nasirpouri F, Mostafaei A, Fathyunes L, Jafari R (2014) Assessment of localized corrosion in carbon steel tube-grade AISI 1045 used in output oil–gas separator vessel of desalination unit in oil refinery industry. Eng Fail Anal 40:75–88. https://doi.org/10.1016/j.engfailanal.2014.02.012 CrossRefGoogle Scholar
- Rawat J, Khandelwal A, Sharma N, Tyagi S (2016) Effect of Sulphate reducing bacterial–biofilm isolated from refinery cooling water system and sonication on corrosion of carbon steel. J Mater Environ Sci 7(2):596–604Google Scholar
- Manual and document of alkylation unit of Bistoun Petrochemical Company in IranGoogle Scholar