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Oxidative Desulfurization of Thiophene in Model Gasoline

Author: LiuBin
Tutor: LiGang
School: Dalian University of Technology
Course: Industrial Catalysis
Keywords: Titanium silicalite TS-1 Hydrogen peroxide Oxidative desulfurization method Gasoline Thiophene Metal Ions
CLC: TE624.55
Type: Master's thesis
Year: 2006
Downloads: 321
Quote: 4
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Abstract


The low sulfide is a trend gasoline , all countries provides for very low sulfur liquid fuel standard . This makes the traditional hydrogenation process is being challenged, and the attention of other non - hydrodesulfurization process . Oxidative desulfurization method has mild reaction conditions , and do not consume hydrogen . Titanium silicalite as a solid catalyst showed good catalytic effect in the field of catalysis . Titanium silicalite as catalyst , oxidative desulfurization of gasoline oxidative removal of the problems have been studied . The main contents are summarized as follows: First, the gasoline component of the selective oxidation of thiophene removal titanium silicalite as catalyst and hydrogen peroxide as the oxidant in the TS-1 / water / H 2 < / sub> O 2 oxidation system , alkanes, alkenes, aromatics three types of hydrocarbon material existence thiophene selective oxidation removal . An alkane oxidative removal of TS-1 catalyst thiophene little ; macromolecular aromatics exist , TS-1 similarly exhibit selected catalytic thiophene oxidation performance , wherein the oxidative removal of the benzene, thiophene no effect ethylbenzene affect the rate of reaction of the thiophene ; 3 olefins, particularly diolefins, severely affected thiophene selective oxidation removal . Second, the catalytic properties of the metal ion modified titanium silicalite using selective adsorption performance of metal ions on titanium silicalite TS-1 modified to improve the TS-1 catalyst the catalytic olefin material existence thiophene selective oxidation of sulfide performance. Different metal ion modified : 1 using the zinc ion of the catalyst is modified , not raise the catalyst in the presence of the olefin selectivity of thiophene . Load a small amount of Au can slightly increase the selectivity of the catalyst for thiophene . 3 using silver ions on the catalyst modification, the TS-1 of thiophene adsorption properties of the silver -modified higher than adsorption of olefins , to improve the catalyst in the presence of the olefin selectivity of thiophene . 4 after the copper ion modified TS-1 showed a better choice for the oxidative removal of thiophene effect, and superior to the modified catalyst of the silver ions . The catalyst of grain size on the thiophene selective oxidation reaction rate is significantly affected . Small grain catalyst pore diffusion path is shorter , the catalytic performance .

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The refining process > Refined treatment > Bleaching, deodorization, sweetening
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