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Preparation method and application of H2O2-modified TiO2/mesoporous glass catalyst

A mesoporous glass, H2O2 technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of reduced specific surface area, small particle size, small reaction contact area, etc., to improve reaction contact Area and light absorption capacity, reducing post-processing steps, and solving the effect of low mass transfer efficiency

Active Publication Date: 2021-08-27
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its small particle size, it is easy to agglomerate itself, resulting in a decrease in the specific surface area, resulting in a small reaction contact area between the catalyst and the fuel, and low light absorption efficiency.
In addition, nanoscale catalysts are difficult to recycle after use, and the separation cost is high. These shortcomings limit the photocatalytic oxidation desulfurization activity of nanoscale TiO2

Method used

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  • Preparation method and application of H2O2-modified TiO2/mesoporous glass catalyst
  • Preparation method and application of H2O2-modified TiO2/mesoporous glass catalyst
  • Preparation method and application of H2O2-modified TiO2/mesoporous glass catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Put 5 g of glass microspheres and 200 mL of deionized water in a high-temperature and high-pressure reactor, raise the pressure of the reactor to 12.5 MPa, and the temperature is 325 ° C, and keep it in the subcritical state for 2 hours. After the temperature of the reactor drops to room temperature, pass The etched glass microspheres were separated from water by filtration, washed several times with deionized water until pH = 7, and then dried for use.

[0041] Add 0.15mL tetrabutyl titanate to a mixed solution of 13mL hydrogen peroxide and 20mL isopropanol to obtain a yellow transparent solution, then add 0.03g hexadecyl ammonium bromide and 0.65g mesoporous glass carrier, ultrasonically disperse evenly Then add 5 mL of deionized water and 10 mL of isopropanol dropwise into a mixed solution, heat to 50°C for hydrolysis for 1 h, transfer the resulting mixture to a stainless steel autoclave, and conduct a crystallization reaction at 140°C for 4 h. The product is centrifu...

Embodiment 2

[0043] Prepare H according to the method of Example 1 2 o 2 Modified TiO 2 / Mesoporous glass photocatalytic oxidation-adsorption desulfurization catalyst, the difference is that the addition of tetrabutyl titanate is 0.31mL, and the titanium dioxide loading of the obtained catalyst is 10wt%.

Embodiment 3

[0045] Prepare H according to the method of Example 1 2 o 2 Modified TiO 2 / Mesoporous glass photocatalytic oxidation-adsorption desulfurization catalyst, the difference is that the addition of tetrabutyl titanate is 0.49mL, and the titanium dioxide loading of the obtained catalyst is 15wt%.

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Abstract

The invention provides a preparation method and application of a H2O2-modified TiO2 / mesoporous glass catalyst, and relates to a photocatalytic oxidation-adsorption in-situ coupled bifunctional catalyst for removing thiophene sulfides in fuel oil. According to the invention, the morphology of the TiO2 / mesoporous glass catalyst is regulated and controlled through H2O2 modification, so the particle size distribution of active components is narrower; mesoporous glass with a large specific surface area is used as a carrier, so a larger reaction interface is provided for dispersion and fixation of a TiO2 photocatalyst and mass transfer between the catalyst and sulfide; and a photocatalytic oxidation-adsorption in-situ coupled system jointly constructed by TiO2 and mesoporous glass provides a solution for the problem of low desulfurization efficiency caused by competitive adsorption of aromatic hydrocarbons in a desulfurization process. In addition, compared with a desulfurization method with an additional oxidant, the photocatalytic oxidation-adsorption catalyst provided by the invention does not need to introduce an additional oxidant, so the problem of low mass transfer efficiency caused by an extreme liquid phase ratio of fuel oil and an oxidant is solved, and the method is green, safe and low in cost.

Description

technical field [0001] The invention belongs to the technical field of oil processing, in particular to a H 2 o 2 Modified TiO 2 The invention discloses a preparation method and application of a mesoporous glass catalyst, which is a preparation method and application of a photocatalytic oxidation-adsorption coupled desulfurization catalyst. Background technique [0002] A large amount of SOx gas will be released after combustion of various organic sulfur compounds remaining in refined petroleum products such as gasoline and diesel oil. The accumulation of these gases in the air is one of the most important causes of acid rain and air pollution. In order to reduce the damage of sulfur compounds to the environment, it is becoming more and more important to develop and produce ultra-clean fuels. The industrialized hydrodesulfurization process is currently a widely used desulfurization technology, but the conditions of the hydrodesulfurization process are harsh, and it usuall...

Claims

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Application Information

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IPC IPC(8): C10G29/00C10G25/00B01J21/08B01J20/10
CPCC10G29/00C10G25/00B01J20/103B01J21/08
Inventor 田景芝柳月郝欣杨思琪郑永杰荆涛赵云鹏
Owner QIQIHAR UNIVERSITY
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