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Ce-Zr-M integral structure combustion catalyst and preparation method thereof

A combustion catalyst and overall structure technology, applied in the direction of combustion methods, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of poor hydrothermal and sulfur resistance, high cost, complicated preparation process, etc., and achieve hydrothermal resistance The effect of good sulfur performance, low manufacturing cost and simple preparation process

Inactive Publication Date: 2018-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the characteristics of the currently disclosed sulfur-resistant combustion catalysts, such as complex preparation process, high cost, and poor hydrothermal and sulfur resistance, the present invention proposes a combustion catalyst with a simple process, low manufacturing cost, and good toxicity resistance and a preparation method thereof

Method used

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  • Ce-Zr-M integral structure combustion catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 26.05g of cerium nitrate hexahydrate and 25.76g of zirconium nitrate pentahydrate and dissolve them in 200ml of deionized water to obtain solution A; weigh 9.36g of ammonium metavanadate and add it to 200ml of deionized water, boil to dissolve, and then add 16g of Titanium sol and 10g of silica sol were used to prepare solution B; then A and B solutions were added to a ball mill tank, and the mixture was ball milled for 2 hours at a speed of 500 rpm to obtain a coating slurry; the whole honeycomb carrier was immersed in the coating In the coating slurry, after taking it out, use compressed air to blow out the excess coating liquid in the pores of the honeycomb carrier; then dry the honeycomb carrier coated with the oxide coating by microwave for 10 minutes, and then bake it at 650 ° C for 3 hours to obtain the coated Mixed oxide coated carrier; dip the mixed oxide coated carrier into palladium nitrate and platinum nitrate solutions sequentially, and blow out the ex...

Embodiment 2

[0026] Weigh 17.36g of cerium nitrate hexahydrate and 17.17g of zirconium nitrate pentahydrate and dissolve them in 300ml of deionized water to obtain solution A; then weigh 23.4g of ammonium metavanadate and add it to 400ml of deionized water, boil to dissolve, and then add 16g of titanium sol and 10g of aluminum sol were used to prepare solution B; solutions A and B were added to a ball mill tank, and the mixture was ball milled for 3 hours at a speed of 500 rpm to obtain a coating slurry; the whole honeycomb carrier was immersed in the coating In the coating slurry, after taking it out, use compressed air to blow out the excess coating liquid in the pores of the honeycomb carrier; then dry the honeycomb carrier coated with the oxide coating by microwave for 10 minutes, and then bake it at 650 ° C for 2 hours to obtain the coated Mixed oxide coated carrier; immerse the mixed oxide coated carrier in palladium nitrate and platinum nitrate solutions sequentially, and blow out th...

Embodiment 3

[0028]Weigh 14.33g of cerium nitrate hexahydrate and 28.34g of zirconium nitrate pentahydrate and dissolve them in 300ml of deionized water to obtain solution A; then weigh 17.55g of ammonium metavanadate and add it to 300ml of deionized water, boil to dissolve, and then add 27.93g of titanium sol and 20g of silica sol were used to prepare solution B; solutions A and B were added to a ball mill tank, and the mixture was ball milled for 2 hours at a speed of 500 rpm to obtain a coating slurry; the whole honeycomb carrier Immerse in the coating slurry, blow out the excess coating liquid in the pores of the honeycomb carrier with compressed air after taking it out; then dry the honeycomb carrier coated with the oxide coating by microwave for 10 minutes, and then bake it at 650 ° C for 3 hours to obtain A carrier coated with a mixed oxide coating; the carrier coated with a mixed oxide coating is immersed in palladium nitrate and platinum nitrate solutions in turn, and the excess so...

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Abstract

The invention discloses a Ce-Zr-M integral structure combustion catalyst and a preparation method thereof. The matrix of the catalyst is an integral honeycomb, and the surface of the matrix is coatedwith oxides Ce, Zr and M, wherein the oxide M is prepared from one or several of oxides Ti, Si, Al, V, W, Co in a certain proportion; active components Pt and Pd are dipped into a carrier coated witha mixed oxide coating layer; and the proportion of Ce to Zr to M in the oxide coating layer is 1 to (0.1-4) to (1-50), the mass proportion of the oxides Ce, Zr and M in an integral honeycomb ceramic body is 0-30wt%, and the proportion of the active components Pt and Pd or Pt-Pd is 0.01wt%-0.2wt%. The integral structure combustion catalyst is high in activity and stability, low in ignition point and small in resistance drop, and a preparation process of the catalyst is simple and low in cost. The integral structure combustion catalyst is suitable for purifying combustion tail gas of a water heater or a gas-fired boiler utilizing natural gas, petroleum liquefied gas or coal gas as a fuel and effectively removing and purifying sulfur-containing VOCs gas.

Description

technical field [0001] The invention belongs to the field of catalytic combustion environmental protection, and in particular relates to a Ce-Zr-M integral structure combustion catalyst and a preparation method. . Background technique [0002] CO is a product of incomplete combustion of carbon-containing substances such as coal and petroleum. It is a colorless, odorless, non-irritating toxic gas. It is almost insoluble in water and does not easily react with other substances in the air. CO in the atmosphere The bottom layer is not easy to spread and stays for a long time. After a long time of human exposure to CO, hypoxia will occur and damage the human central nervous system. When the CO concentration reaches 30mg / m 3 Over time, it can cause symptoms such as headache, fatigue, cherry red lips, and rapid heartbeat. After a long time, it will produce hypoxia and damage the central nervous system, causing dizziness, headache, physical discomfort, fatigue and other symptoms. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/648B01J23/89F23G7/07
CPCF23G7/07B01J23/002B01J23/6482B01J23/8993B01J2523/00B01J35/56B01J2523/3712B01J2523/48B01J2523/55B01J2523/824B01J2523/828B01J2523/69B01J2523/845
Inventor 王胜王树东林乐高典楠汪明哲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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