Sensitivity analysis of a light gas oil deep hydrodesulfurization process via catalytic distillation |
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Authors: | A Rosales-Quintero FD Vargas-Villamil E Arce-Medina |
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Affiliation: | aProg. de Matemáticas Aplicadas y Computación, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, México, D.F. 07330, Mexico bInstituto Politécnico Nacional, ESIQIE, Ed. 8 Col. Lindavista, México, D.F. 07738, Mexico |
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Abstract: | In this work, a sensitivity analysis of a light gas oil deep hydrodesulfurization catalytic distillation column is presented. The aim is to evaluate the effects of various parameters and operating conditions on the organic sulfur compound elimination by using a realistic light gas oil fraction. The hydrocarbons are modeled using pseudocompounds, while the organic sulfur compounds are modeled using model compounds, i.e., dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6-DMDBT). These are among the most refractive sulfur compounds present in the oil fractions. A sensitivity analysis is discussed for the reflux ratio, bottom flow rate, condenser temperature, hydrogen and gas oil feed stages, catalyst loading, the reactive, stripping, and rectifying stages, feed disturbances, and multiple feeds. The results give insight into the qualitative effect of some of the operating variables and disturbances on organic sulfur elimination. In addition, they show that special attention must be given to the bottom flow rate and LGO feed rate control. |
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Keywords: | Hydrodesulfurization Catalytic distillation Reactive distillation Gas oil Diesel |
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