Dissertation > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The refining process > Catalyst

Preparation of Titanium Pillared Photocatalyst and Research on Oxidative Desulfurization

Author ZhaoBaoLin
Tutor NaPing
School Tianjin University
Course Chemical Engineering
Keywords Deep Desulfurization Photocatalytic Model gasoline Oxidative Desulfurization Pillared
CLC TE624.9
Type Master's thesis
Year 2007
Downloads 94
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Production and use of environmentally friendly ultra- low-sulfur , zero-emission clean fuel is the general trend of the development of the World Clean Fuels , which makes conventional hydrodesulfurization process is facing great challenges . Photocatalytic oxidation desulfurization process because of its mild reaction conditions , low operating costs , can achieve deep desulfurization characteristics , is expected to be the hydrodesulfurization beneficial alternative and complementary process . Tetrabutyl titanate as precursor, montmorillonite prepared by sol - gel as a carrier , the pillared photocatalyst . With N 2 < / sub> - sorption , XRD , TEM , FT - IR , UV- Vis Test levy means photocatalyst titanium column support structure characterization , effects of titanium pillaring agent addition and heat treatment temperature the microscopic structure and activity of the pillared photocatalyst . Homemade photocatalytic reactor , and support in the preparation of titanium column material as a photocatalyst , select acetonitrile as the extraction solvent to oxygen as the oxygen source , ultraviolet light to carry out the experimental study of the photocatalytic oxidation of model gasoline deep desulfurization study of titanium pillared light photocatalytic activity and the impact of photocatalytic oxidation desulfurization various factors . Structural characterization results photocatalyst showed an increasing trend in the specific surface area and pore volume with the increase in the amount of titanium pillaring agent , pillared when Ti / CEC , about 72.7 MMT almost saturated ion exchange , this condition the prepared titanium pillared photocatalyst having a larger specific surface area and pore volume . The heat treatment temperature of titanium pillared the photocatalyst structure and photocatalytic properties important factors . 350 ℃ heat treatment for 3 hours, the pillared photocatalyst having good photocatalytic activity , the active ingredient of TiO 2 anatase crystalline phase , and more uniform distribution in the interlayer , a specific surface area more appropriate . Experimental studies have shown that the reaction time , the amount of extractant and catalyst amount of other factors have an important impact on photocatalytic oxidative desulfurization . Using bubbling in the form of the introduction of oxygen , further optimized photocatalytic oxidation desulfurization process . The reaction temperature was 25 ° C , optical catalyst is added in an amount of 1g / L , oxygen gas velocity of 800ml/min reaction for 6 hours under the conditions of simulated gasoline sulfur content is reduced to about 10ppm by 400ppm . The pillared photocatalyst showed very good photocatalytic activity photocatalytic oxidation desulfurization process can achieve deep desulfurization purpose .

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