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Sulfur compounds in transportation fuels have been a major concern for environmental researchers due to the production of their obnoxious oxides. This work reports the preparation of Fe 2 O 3 , NiO 2 , and ZnO promoted Montmorillonite (MMT) catalyzed O 2 /CH 3 COOH oxidation system for the elimination of dibenzothiophene (DBT) from transportation fuels oils. The as-synthesized catalysts were characterized via FTIR, EDX SEM, and XRD techniques which suggested intriguing surface properties conducive to the removal of DBT molecules. Desulfurization activity experiments showed that Fe 2 O 3 /MMT-O 2 /CH 3 COOH catalyst-oxidant system decreased the sulfur content (from a model solution) from 500 to 22.9 ppm in 60 min at 60 °C. Under the optimized conditions, the sulfur levels from commercial gasoline, diesel and kerosene oil were decreased from 25.3 to 11.7 mg/L, 3800.53 to 1467.7 mg/L and 3296.6 2450 mg/L, respectively. The spent catalysts were also characterized in detail which justified the catalytic activity of different catalysts. Accrediting its environmental benignity, cost-effectiveness, and ease of preparation, this study provides important reference information for the industrial-scale desulfurization of transportation oils.

petroleum science and technology

Preparation of Fe 2 O 3 , NiO 2 , and ZnO supported montmorillonite clay for oxidative desulfurization of transportation fuels in O 2 /CH 3 COOH oxidation system