Designing Deisopentanizer Columns of Isomerization Units to Increase the Octane Number of Gasoline

Mohammadzadeh, Fatemeh; Hayati-Ashtiani, Majid

doi:10.22034/farayandno.2025.2064143.1999

Designing Deisopentanizer Columns of Isomerization Units to Increase the Octane Number of Gasoline

Document Type : Original research

Authors

Fatemeh Mohammadzadeh ¹

Majid Hayati-Ashtiani ²

¹ Ph.D. Student of Chemical Engineering, Faculty of Engineering, University of Kashan, Iran

² Assistant Professor of Chemical Engineering, Faculty of Engineering, University of Kashan, Iran

10.22034/farayandno.2025.2064143.1999

Abstract

In this research, the De-isopentanizer tower of the three selected units was designed and redesigned aiming to examine the octane number of the effluent from the De-isopentanizer tower, the isopentane recovery rate, and improving the processes of selected units. The octane number of the tower top products in reference unit and 3 are 91.5 and 91.28, respectively, and the recovery rate of isopentane in the reference units is 95.96%, and in unit 3 is 92.68%. Unit 2 has an octane number and recovery of 85 and 75.24%, respectively, which is the lowest among all. By carrying out the retrofit in Units 2 and 3, a new process was achieved. A cost analysis of the De-isopentanizer towers designed for units 2 and 3 and the simulated tower for the reference unit showed that the fixed, operating, utility, and total costs of the reference unit were higher than the others.

Keywords

Isopentane

Isomerization

Gasoline

Retrofit

Octane Number

Subjects

etc.

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