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Issue
Korean Journal of Chemical Engineering,
Vol.37, No.11, 1867-1877, 2020
Non-catalytic oxidative desulfurization of gas condensate by ozone and process optimization using response surface methodology
Alibolandi M, Darian JT, Ghaedian M, Royaee SJ, Shafeghat A
This study modelled and optimized the oxidative desulfurization of gas condensate with ozone, as a gaseous oxidant. Experiments in this study were non-catalytic, and sulfone extraction was done by acetone. Response surface methodology was applied for the experimental design, mathematical modeling, and optimization using Design-Expert® software. The influence of effective variables and their interaction on the response was also investigated. For the first time, non-catalytic ozonation of this feed was performed on the oxidative desulfurization process. The developed model properly fitted the experimental results. The accuracy of the model was confirmed, while this model predicted 95% desulfurization would result in the optimized conditions, and the actual value of desulfurization obtained was 95.8%. Further, the results indicated interaction between the superficial gas velocity of ozone and coefficient of oxidant-to-sulfur molar ratio. GC-SCD revealed that DBT was the most refractory component in comparison with the other sulfur components in the gas condensate. It was also found that 84.3% desulfurization occurred just with oxidation and sedimentation of sulfones and without solvent extraction.
Keywords: Oxidative Desulfurization; Gas Condensate; Ozone; Response Surface Methodology
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