Catalytic oxidative desulfurization of dibenzothiophene using catalyst of tungsten supported on resin D152
2014; Elsevier BV; Volume: 130; Linguagem: Inglês
10.1016/j.fuel.2014.04.005
ISSN1873-7153
AutoresZhiyong Long, Chunping Yang, Guangming Zeng, Lanyan Peng, Chuanhua Dai, Huijun He,
Tópico(s)Nanomaterials for catalytic reactions
ResumoIn this paper, the performance of catalytic oxidative desulfurization (ODS) were studied using catalyst W/D152 which was prepared by depositing tungsten on resin D152, a macroporous polyacrylic cationic resin. Dibenzothiophene (DBT) was selected as the target compound, and oil-soluble cyclohexanone peroxide (CYHPO) as an oxidant. The effect of different reaction parameters, including reaction temperature, reaction time, the weight of catalyst W/D152 and the molar ratio of CYHPO/DBT were investigated, and the oxidation mechanisms as well as the kinetics were also examined individually. The conversion of DBT and the sulfur content reached 99.1% and 3.52 ppm, respectively at the optimal catalytic conditions of 100 °C, mass ratio of model gasoline to catalyst W/D152 of 100, molar ratio of CYHPO/DBT of 2.5 and reaction time of 40 min. The catalyst could be reused for 7 times before the total sulfur content of treated model gasoline was higher than 10 ppm. The catalytic oxidation of DBT fitted the first-order kinetic model pretty well. The catalyst W/D152 was analyzed by the scanning electron microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR), and the data show that a thin layer of active components was covered on the catalyst surface which helps explain the satisfactory catalytic performance.
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