Method for preparing efficient oxidation catalyst through plasma-assisted sol gel method

A sol-gel method and plasma technology, applied in the field of pollutant control, can solve the problems of WFGD, such as difficult removal and insoluble in water, and achieve the effects of low cost, simple preparation process, and wide temperature adaptation window

Active Publication Date: 2015-11-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among the nitrogen oxides emitted from coal-fired flue gas, 90% to 95% exist in the

Method used

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  • Method for preparing efficient oxidation catalyst through plasma-assisted sol gel method
  • Method for preparing efficient oxidation catalyst through plasma-assisted sol gel method
  • Method for preparing efficient oxidation catalyst through plasma-assisted sol gel method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing an efficient oxidizing catalyst by a plasma-assisted sol-gel method, comprising the steps of:

[0043] (1) Put 35.8g of 50% manganese nitrate solution into a beaker, dissolve it with deionized water, and stir at room temperature to obtain a homogeneous solution; pour 27.3g of citric acid monohydrate and 2.73g of polyethylene glycol into the previous mixture , stirring at room temperature to obtain a mixed solution;

[0044] (2) Heat the beaker containing the solution in a water bath at 80°C, and stir continuously with an electromagnetic stirrer until the solution becomes a colloid;

[0045] (3) Put the colloid in a drying oven and dry it at 110°C for 12 hours, put the dried colloid sample in a mortar, grind it into particles below 40 mesh, and wait for plasma treatment;

[0046] (4) Fill the sample between the rod-shaped electrode in the discharge quartz tube and the wall of the quartz tube, and pass through the simulated air containing 21% oxyge...

Embodiment 2

[0050]Get a certain amount of embodiment 1 catalyst powder sample, by carrying out X-ray photoelectron spectrum test to sample, analyze the energy spectrum of its O1s, its spectrogram is with reference to figure 1 shown. The test instrument is ThermoESCALAB250. analyzed by spectrum figure 1 It can be seen that peak 1 is lattice oxygen, peak 2 is surface unsaturated oxygen species, and peak 3 is adsorbed oxygen and adsorbed water species. The large areas of peaks 2 and 3 indicate that there are many active oxygen species on the surface of the catalyst, which is beneficial to the catalytic oxidation reaction.

Embodiment 3

[0052] A method for preparing an efficient oxidizing catalyst by a plasma-assisted sol-gel method, comprising the steps of:

[0053] (1) Put 26.9g of 50% manganese nitrate solution and 10.9g of cerium nitrate hexahydrate into a beaker, dissolve them in deionized water, and stir at room temperature to obtain a mixed solution; mix 27.3g of citric acid monohydrate and 2.73g of polyethylene glycol , pour the previous mixed solution, and stir at room temperature to obtain a mixed solution;

[0054] (2) Heat the beaker containing the solution in a water bath at 80°C, and stir continuously with an electromagnetic stirrer until the solution becomes a colloid;

[0055] (3) Put the colloid in a drying oven and dry it at 110°C for 12 hours, put the dried sample in a mortar, and grind it into particles below 40 mesh, and then treat it with plasma;

[0056] (4) Fill the sample between the rod-shaped electrode in the discharge quartz tube and the wall of the quartz tube, and pass through t...

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Abstract

The invention relates to a method for preparing an efficient oxidation catalyst through a plasma-assisted sol gel method. Active particles in plasma are used for decomposing organic matter and nitrate in gel at normal temperature, and the oxidation catalyst with the active components being MnOx or MnCeOx is prepared. The method has the advantages that firstly, catalytic oxidation is performed on nitrogen oxide, and high activity and selectivity are achieved; secondly, a wide temperature adaptation window is arranged; thirdly, the preparation technology is simple, cost is low, and the method can be widely used for the preparation process of denitration catalysts performing selective catalytic oxidation on flue gas.

Description

technical field [0001] The invention belongs to the field of pollutant control, and relates to a catalyst and a preparation method, in particular to a method for preparing an efficient oxidizing catalyst by a plasma-assisted sol-gel method. Background technique [0002] With the rapid economic growth and industrial development, the pollution problem caused by the burning of industrial dyes has become increasingly serious, which has caused great harm to the human body and brought a crisis that cannot be ignored to the environment. Especially the emission of nitrogen oxides, sulfur oxides and nitrogenous substances, acid rain, ozone depletion, photochemical smog, and global warming are not unrelated. The pollution of nitrogen oxides and sulfur oxides in the industrial production process has become a hot spot of global concern. Its treatment is also the focus of scientific research. [0003] Domestic industrial waste gas is still in its infancy, and the treatment is mainly to...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01D53/56B01D53/86
Inventor 高翔郑成航竺新波骆仲泱岑可法倪明江吴卫红张涌新翁卫国刘璐周劲松方梦祥程乐鸣
Owner ZHEJIANG UNIV
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