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A preparation method of high-performance CO oxidation and NOX elimination oxygen storage material

An oxygen storage material, a high-performance technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve microstructure instability, decreased oxygen storage capacity, easy Sintering specific surface area and other issues, to achieve low cost, short reaction cycle, good application effect

Active Publication Date: 2018-11-20
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But pure MnO x Due to its extremely unstable microstructure and the storage and release of oxygen mainly rely on its surface, oxides are easy to sinter at high temperatures, resulting in a rapid decrease in specific surface area, resulting in a decrease in oxygen storage capacity.

Method used

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  • A preparation method of high-performance CO oxidation and NOX elimination oxygen storage material
  • A preparation method of high-performance CO oxidation and NOX elimination oxygen storage material
  • A preparation method of high-performance CO oxidation and NOX elimination oxygen storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh each reactant and prepare: Weigh 1.8964g of potassium permanganate solid in beaker X, and dissolve it in 40mL deionized water to obtain a 0.3mol / L potassium permanganate solution; weigh manganese nitrate and dissolve it in deionized water , forming a manganese nitrate solution with a mass concentration of 50%, for subsequent use; taking 5.6738g of citric acid monohydrate and dissolving it in deionized water to form a citric acid solution with a concentration of 3mol / L, for subsequent use; weighing 1.6216g of urea and dissolving it in In deionized water, forming concentration is the urea solution of 3mol / L, standby; The mol ratio between potassium permanganate, manganese nitrate, citric acid monohydrate, urea is potassium permanganate: manganese nitrate: citric acid monohydrate: urea =2:1:4.5:4.5.

[0030] Take by weighing 2.1474g above-mentioned standby manganese nitrate solution and above-mentioned standby whole citric acid solution (manganese nitrate: monohydrat...

Embodiment 2

[0032] Weigh each reactant and prepare: Weigh 1.8964g of potassium permanganate solid in beaker X, and dissolve it in 40mL deionized water to obtain a 0.3mol / L potassium permanganate solution; weigh manganese nitrate and dissolve it in deionized water , form a mass concentration of 50% manganese nitrate solution, for subsequent use; take 5.6738g of citric acid monohydrate and dissolve it in deionized water to form a citric acid solution with a concentration of 3mol / L, for subsequent use; weigh 0.0435g of nitric acid trihydrate Dissolve copper in deionized water to form a copper nitrate solution with a concentration of 3mol / L for subsequent use; weigh 1.6216 g of urea and dissolve it in deionized water to form a urea solution with a concentration of 3mol / L for subsequent use; potassium permanganate, nitric acid The mol ratio between manganese, citric acid monohydrate, and urea is potassium permanganate: manganese nitrate: citric acid monohydrate: urea=2:1:4.5:4.5.

[0033] Take...

Embodiment 3

[0035] Weigh each reactant and prepare: Weigh 1.8964g of potassium permanganate solid in beaker X, and dissolve it in 40mL deionized water to obtain a 0.3mol / L potassium permanganate solution; weigh manganese nitrate and dissolve it in deionized water , form a mass concentration of 50% manganese nitrate solution, for subsequent use; take 5.6738g of citric acid monohydrate and dissolve it in deionized water to form a citric acid solution with a concentration of 3mol / L, for subsequent use; weigh 0.2135g of nitric acid trihydrate Dissolve copper in deionized water to form a copper nitrate solution with a concentration of 3mol / L for subsequent use; weigh 1.6216 g of urea and dissolve it in deionized water to form a urea solution with a concentration of 3mol / L for subsequent use; potassium permanganate, nitric acid The mol ratio between manganese, citric acid monohydrate, and urea is potassium permanganate: manganese nitrate: citric acid monohydrate: urea=2:1:4.5:4.5.

[0036] Take...

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Abstract

The invention discloses a method for preparing a high-performance CO oxidation and NOx elimination oxygen storage material: (1) Mix manganese nitrate solution and citric acid solution to obtain mixed solution A; (2) Dropwise add potassium permanganate solution, After completion, add copper nitrate solution and urea solution respectively; (3) adjust the pH value of the solution obtained in step (2), and perform a hydrothermal reaction after stirring; (4) centrifuge the material obtained after the hydrothermal reaction in step (3), The obtained precipitate is dried, crushed and roasted in sequence to obtain the product. The preparation method of high-performance CO oxidation and NOx elimination oxygen storage materials of the present invention is simple and safe to operate, has a short reaction cycle, good repeatability, and easy control of operating process parameters. The resulting product uses materials with low cost, high activity, high thermal stability, and can Catalytically reduces carbon monoxide and nitrogen oxides at lower temperatures, and is well used in materials research, catalytic oxidation of carbon monoxide, and catalytic reduction of nitrogen oxides.

Description

technical field [0001] The invention belongs to the technical field of composite nanomaterials, in particular to a high-performance CO oxidation and NO x Elimination of methods of preparation of oxygen storage materials. Background technique [0002] The Cu-Mn-O composite oxide catalyst with mesoporous structure has better catalytic elimination characteristics for carbon monoxide and nitrogen oxides, MnO x And Mn-containing materials are widely used in three-way catalysis of automobile exhaust, catalytic conversion of water gas and catalytic oxidation of CO and benzyl alcohol due to their unique oxygen storage performance and high porosity. It plays an extremely important role in the field of catalytic materials. [0003] The outer electron structure of the transition element manganese is 3d 5 4s 2 , There are three chemical valence states of +4, +3 and +2, and its standard reduction potential is low, so it is easy to realize the mutual conversion between ions in each ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889
CPCB01J23/8892B01J35/615B01J35/647
Inventor 董丽辉刘唐康李斌范闽光
Owner GUANGXI UNIV