Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/28714
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    標題: The Oxidative Desulfurization Of Fuels With A Transition Metal Catalyst: A Comparative Assessment Of Different Mixing Techniques
    作者: Lu, Ming-Chun
    Charisse Biel, Luisa Cyd
    Wan, Meng-Wei
    de Leon, Rizalinda
    Arco, Susan
    貢獻者: 環境資源管理系
    環境工程與科學系
    關鍵字: Benzothiophene
    Box-behnken design
    Dibenzothiophene
    High shear mixer
    Ultrasound-Assisted oxidative desulfurization
    日期: 2014-09
    上傳時間: 2015-05-06 21:26:09 (UTC+8)
    出版者: Taylor & Francis Inc
    摘要: In this study, oxidative desulfurization of sulfur compounds using hydrogen peroxide, phosphotungstic acid, and phase-transfer agent using high-intensity probe ultrasonication, and high shear mixer was investigated. The effect of agitation speed (7600--14,000 rpm), reaction temperature (50--70 degrees C), and treatment time (10--30 min) on sulfur conversion was examined and optimized using response surface methodology. A box-behnken design was employed to determine the significance of various process parameters and their interactions using analysis of variance. Analytical results for the model sulfur compounds by ultrasound-assisted oxidative desulfurization and high shear showed comparable results. Both treatment systems provided a 98% conversion of dibenzothiopene and benzothiopene to polar sulfones at 70 degrees C in 30 min. In both systems, the experimental data followed the pseudo-first-order equation with activation energy of 60 kJ degrees mol. Results indicate that ultrasound energy produce greater reaction rates when compared to mixing with no significant difference in activation energy. In addition, the advantages and drawbacks of ultrasound-assisted extraction with respect to the high shear oxidative desulfurization were discussed.
    關聯: International Journal of Green Energy, v.11 n.8, pp.833-848
    显示于类别:[環境資源管理系(所)] 期刊論文
    [環境工程與科學系(所)] 期刊論文

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