English  |  正體中文  |  简体中文  |  Items with full text/Total items : 17760/20057 (89%)
Visitors : 7996831      Online Users : 481
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/30956


    標題: Oxidation by H2O2 of bezothiophene and dibenzothiophene over different polyoxometalate catalysts in the frame of ultrasound and mixing assisted oxidative desulfurization
    作者: Choi, Angelo Earvin Sy
    Roces, Susan
    Dugos, Nathaniel
    Wan, Meng-Wei
    貢獻者: De La Salle Univ, Dept Chem Engn
    Chia Nan Univ Pharm & Sci, Dept Environm Resource Management
    關鍵字: Benzothiophene
    Dibenzothiophene
    Mixing-assisted oxidative desulfurization
    Polyoxometalate catalysts
    Ultrasound-assisted oxidative desulfurization
    thiophene
    日期: 2016-09
    上傳時間: 2018-01-18 11:38:41 (UTC+8)
    出版者: Elsevier Sci Ltd
    摘要: Desulfurization involves the removal of refractory sulfur compounds in fossil-fuel derived oils. In this study, an ultrasound and mixing assisted oxidative desulfurization of synthetic oil containing sulfur compounds of benzothiophene and dibenzothiophene were carried out using different polyoxometalate catalysts, H2O2 oxidant and a phase transfer agent. The effects of reaction time (2-30 min) and temperature (30-70 degrees C) were examined in the oxidation of benzothiophene and dibenzothiophene. Results showed high correlation to the pseudo first-order reaction kinetics (R-2 > 0.97) and Arrhenius equation (R-2 > 0.99) that draws out the rate constant and activation energy of each catalyst tested in the oxidation process. Oxidation of benzothiophene and dibenzothiophene using different polyoxometalate catalysts showed a catalytic activity trend of Na3PW12O40 > H3PW12O40 > H3PM12O40 > H4SiW12O40. Furthermore, ultrasound and mixing assisted oxidative desulfurization showed comparable results (<5% difference) in oxidation efficiency and better performance in the kinetic reaction rate and activation energy as compared to conventional oxidation step in the oxidative desulfurization technique. (C) 2016 Elsevier Ltd. All rights reserved.
    關聯: Fuel, v.180, pp.127-136
    Appears in Collections:[環境資源管理系(所)] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML279View/Open


    All items in CNU IR are protected by copyright, with all rights reserved.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback