Wax Deposition of Diesel Oil and Consequent Contamination of Gasoline in Sequential Transportation of Product Oil Pipeline

Weidong Li, Lin Xie, Shengping Du, Hanqing Zhang, Jiazong Mo, Shulong Wei, Pengbo Yin () and Kaifeng Fan ()
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Weidong Li: College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
Lin Xie: College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
Shengping Du: PipeChina Guangxi Company, Nanning 530219, China
Hanqing Zhang: College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
Jiazong Mo: PipeChina Guangxi Company, Nanning 530219, China
Shulong Wei: PipeChina Guangxi Company, Nanning 530219, China
Pengbo Yin: College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
Kaifeng Fan: School of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou 213164, China

Energies, 2024, vol. 17, issue 17, 1-10

Abstract: Wax deposition of diesel oil and contamination of gasoline by diesel wax deposit is a severe problem in sequential transportation of product oil in pipes. However, it has long been neglected by the pipeline transportation industry. In response, this work aims to present a unique perspective on wax deposition of diesel oil and consequent contamination of gasoline. A cold finger apparatus was designed and constructed. Model oil composed of diesel and refined wax was prepared for wax deposition. Shear dispersion was excluded for wax deposition of diesel oil. Moreover, dissolution experiments of diesel wax deposit in gasoline were conducted. It was found that the dissolution rate increases with oil temperature and decreases with cold finger temperature and shear stress. Analysis on gasoline quality after diesel wax deposit dissolution indicated that contamination of gasoline caused by diesel wax deposit severely deteriorates its distillation range, but the octane number remains acceptable. This work features an interesting investigation on the wax-deposition mechanism of diesel oil, dissolution characteristics of diesel wax deposit, as well as quality deterioration of subsequent gasoline. It would be helpful in scheduling a product oil-transportation program.

Keywords: product oil pipeline; wax deposition of diesel; contamination of gasoline; distillation range; octane number (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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