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Copper oxide pillared layered manganese oxide catalyst as well as preparation method and application thereof

A technology of layered manganese oxide and copper oxide, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve catalyst chlorine poisoning, high price, resource Shortage and other problems, to achieve the effect of high catalytic activity

Active Publication Date: 2017-10-24
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, precious metal resources such as Pt and Pd are scarce and expensive, and the active components are easy to volatilize and sinter, and when burning VOCs containing halogens, the catalyst is prone to chlorine poisoning

Method used

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  • Copper oxide pillared layered manganese oxide catalyst as well as preparation method and application thereof
  • Copper oxide pillared layered manganese oxide catalyst as well as preparation method and application thereof
  • Copper oxide pillared layered manganese oxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) 140g potassium hydroxide is dissolved in 300ml distilled water; (2) 40g manganese acetate tetrahydrate and 3g copper chloride are dissolved in 300ml distilled water; (3) the solution of step (2) is added to step (1) solution, accompanied by stirring; (4) 9.5g potassium permanganate was dissolved in 1L distilled water and added to the suspension obtained in step (3) with stirring; (5) step (4) obtained The suspension was stirred at room temperature for 72 hours; (6) the suspension in step (5) was filtered, washed with 1mol / L hydrochloric acid and distilled water several times, and then dried in a 65°C oven for 16 hours; (7) The sample prepared in step (6) was calcined at 300° C. in an air atmosphere for 5 hours, and the heating rate during the heating process was 5° C. / min.

[0035] The present embodiment shows by calculation that the mol ratio of Cu:Mn is 1:9, and the toluene conversion performance test is as follows figure 1 Shown, the light-off temperature of its...

Embodiment 2

[0043] In this example, copper oxide pillared layered manganese oxide catalysts with different copper contents were prepared by changing the amount of copper nitrate added.

[0044] (1) 140g potassium hydroxide is dissolved in 300ml distilled water; (2) 39.2g manganese acetate tetrahydrate and a certain amount of copper nitrate are dissolved in 300ml distilled water, wherein the molar ratio of Cu / Cu+Mn is 0.05-0.5; (3) Add the solution of step (2) to the solution obtained in step (1) with stirring; (4) dissolve 9.5g of potassium permanganate in 1L of distilled water and add it to the suspension obtained in step (3). (5) Place the suspension obtained in step (4) at 60°C with stirring for 72h; (6) Filter the suspension in step (5), and use 1M hydrochloric acid and Rinse with distilled water several times and then dry in an oven at 65°C for 16h; (7) The solid material obtained in step (6) was roasted in air at 300°C for 5h, and the heating rate during the heating process was 5°C / ...

Embodiment 3

[0046] In this example, copper oxide pillared layered manganese oxide catalysts at different calcination temperatures were obtained by changing the calcination temperature.

[0047] (1) 140g potassium hydroxide is dissolved in 300ml distilled water, is placed in ice bath after being cooled to room temperature; (2) 39.2g manganese acetate tetrahydrate and 3g cupric chloride are dissolved in 300ml distilled water; (3) step The solution of (2) is added in the solution that step (1) obtains, and with stirring; (4) after 9.5g potassium permanganate is dissolved in 1L distilled water, join in the suspension that step (3) obtains and with with stirring; (5) place the suspension obtained in step (4) at 40°C with stirring for 72 hours; (6) filter the suspension in step (5), wash it several times with 1M hydrochloric acid and distilled water and then Dry in an oven at 65°C for 16 hours; (7) The solid material obtained in step (6) is roasted in air at 65-500°C for 5 hours, and the heatin...

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Abstract

The invention provides a copper oxide pillared layered manganese oxide catalyst as well as a preparation method and an application thereof. The method comprises the steps as follows: (1) a manganese salt and copper salt mixed solution is mixed with an alkaline solution with stirring; (2) a coprecipitate obtained in step (1) is oxidized with stirring; (3) a substance obtained in step (3) is subjected to solid-liquid separation and washing; (4) a layered manganese oxide material of a copper ion interlayer obtained in step (3) is placed in a calcinator to be heated to 100-500 DEG C in an air atmosphere for 2-5 h, and the copper oxide pillared layered manganese oxide catalyst is obtained after cooling. The prepared catalyst can be applied to catalytic oxidation of VOCs (volatile organic chemicals) and has the advantages of low initiation temperature, wide active temperature window and the like, the initiation temperature of methylbenzene burning under catalysis of the catalyst can be reduced to 180 DEG C, and the catalytic oxidation efficiency of VOCs can be kept at 100% at the temperature of 220-400 DEG C.

Description

technical field [0001] The invention relates to the technical fields of material science engineering, chemical reaction engineering and environmental protection, in particular to a copper oxide pillared layered manganese oxide catalyst and its preparation method and application. Background technique [0002] With the rapid economic development and the continuous improvement of urbanization level, my country's PM2.5 and O 3 The problem of regional air pollution is becoming more and more prominent. Volatile organic gases (VOCs), as one of the precursors of PM2.5, are an important cause of smog; at the same time, VOCs are also crucial to the generation of urban and regional ozone, and their photochemical reactions can cause urban photochemical smog. [0003] The VOCs treatment technology system is complex, involving more than a dozen engineering technologies such as condensation, adsorption, catalytic combustion, photocatalytic oxidation, and low-temperature plasma. These tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889F23G7/07
CPCF23G7/07B01J23/8892B01J37/03F23G2209/14B01J35/50
Inventor 刘勇军程琰李盼宋吴波
Owner SICHUAN UNIV
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