engleski

Modeling of FCC gasoline desulfurization process by liquid extraction with sulfolane

Extractive desulfurization of FCC gasoline with sulfolane was studied in the batch apparatus. Influence of three inlet parameters (temperature, inlet sulfur content and solvent ratio) on the process response, i.e. desulfurization efficiency, was investigated with the use of Box Behnken experimental design by response surface methodology. Mathematical model that can be used for predicting sulfur content in raffinate after extractive batch process with sulfolane was statistically developed and proven with analysis of variance. With the conducted statistical analysis, it has been shown that the largest influence on desulfurization efficiency had solvent ratio, second most significant influence had inlet sulfur content, then temperature and last interaction between solvent ratio and inlet sulfur content. Obtained second order polynomial model points that maximum desulfurization efficiency of 65.34% can be achieved at temperature of 50°C and higher values of inlet sulfur content and solver ratio in the researched range of inlet parameters values.

liquid extraction; FCC gasoline; desulfurization; sulfolane; mathematical modeling

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