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Catalyst for catalytically removing environmental pollutants at low temperature and preparation method thereof

A technology of catalysts and composite oxides, which is applied in the field of low-temperature catalytic removal of environmental pollutants and its preparation. It can solve the problems of high cost and complicated process procedures, and achieve the effects of low price, economical and simple preparation process, and improved stability.

Active Publication Date: 2018-07-03
SHANGHAI FLORY ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process is complicated and costly, and it will have great limitations in practical application.

Method used

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  • Catalyst for catalytically removing environmental pollutants at low temperature and preparation method thereof
  • Catalyst for catalytically removing environmental pollutants at low temperature and preparation method thereof
  • Catalyst for catalytically removing environmental pollutants at low temperature and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment relates to a catalyst capable of catalytically removing various environmental pollutants at low temperature and its preparation method; the preparation method includes the following steps:

[0035] 1. Use Co(NO 3 ) 3 ·6H 2 O as cobalt source, take 2.91g, use Pr(NO 3 ) 3 6H 2O as the source of praseodymium, take 3.39g, use silver nitrate as the silver source, take 1.02g, weigh 20g of citric acid monohydrate, put it into a beaker, add 150mL of deionized water and stir to disperse to form a solution.

[0036] 2. The solution obtained above was evaporated to dryness with stirring at 80° C., and dried in an oven for 12 hours.

[0037] 3. Put the powdered solid sample into a corundum crucible with a volume of 200mL, then place the sample-filled crucible in a muffle furnace, raise the temperature to 500°C at a rate of 10°C / min, and keep it warm for 4h. After cooling, take it out and place it in an agate mortar for grinding, then put the sample-filled porc...

Embodiment 2

[0042] This embodiment relates to a catalyst capable of catalytically removing various environmental pollutants at low temperature and its preparation method; the preparation method includes the following steps:

[0043] 1. Use C 4 h 6 COO 4 4H 2 O as cobalt source, take 2.431g, Ce(NO 3 ) 3 6H 2 O as the cerium source, take 0.0868g and use silver nitrate as the silver source, take 0.17g, weigh 20g of citric acid monohydrate, put it into a 200ml beaker, add 100mL of deionized water to dissolve the above powder.

[0044] 2. The solution obtained above was evaporated to dryness with stirring at 80° C., and dried in an oven for 12 hours.

[0045] 3. Put the powdered solid sample into a corundum crucible with a volume of 200mL, then place the sample-filled crucible in a muffle furnace, raise the temperature to 900°C at a rate of 10°C / min, and keep it warm for 4h. After cooling, take it out and put it in an agate mortar for grinding, then put the sample-filled porcelain cruci...

Embodiment 3

[0050] This embodiment relates to a catalyst capable of catalytically removing various environmental pollutants at low temperature and its preparation method; the preparation method includes the following steps:

[0051] 1. Use Co(NO 3 ) 3 ·6H 2 O as cobalt source, take 5.82g, use Ce(NO 3 ) 3 6H 2 O as a cerium source, take 10.861g, place in a beaker, add 150ml of deionized water, and dissolve the above powder. Prepare another 1mol / L Na 2 CO 3 250ml of the solution is ready for use.

[0052] 2. Add 1mol / L Na 2 CO 3 The solution was added dropwise to the mixed solution of cobalt nitrate and cerous nitrate in a stirring state, and the pH value of the solution was monitored by a pH meter. When the pH stabilized at 8, the dropwise addition was stopped.

[0053] 3. After the obtained precipitate was aged for 10 hours, it was washed with deionized water and suction-filtered 5 times, and the precipitate was dried in an oven at 100°C.

[0054] 4. Put the powder solid sampl...

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Abstract

Disclosed is a catalyst capable of catalytically removing environmental pollutants at low temperature and a preparation method thereof. Said catalyst is a compound with a chemical formula zAg / Co 1-xM xO y and comprised of four elements, that is, Ag, Co, M and O, wherein M=any one of La, Ce or Pr, and 0.02≤x≤0.5, 1.33≤y≤2, 0.05≤z≤0.3, M:Co atomic ratio is x:(1-x), and Ag:(Co+M) atomic ratio is z:1. The obtained catalyst can remove catalytically common environmental pollutants such as carbon monoxide and particulate matters at low temperature, and improve, by adjusting the values of x and z, the temperature window of ammonia selective catalytic reduction of nitrogen oxide during the control of a diesel engine discharging pollution .

Description

technical field [0001] The invention belongs to the technical field of environmental catalysis, and in particular relates to a catalyst for low-temperature catalytic removal of environmental pollutants and a preparation method thereof. Background technique [0002] Environmental catalysis is a technology that uses catalysts to convert harmful substances in the environment into environmentally friendly products. With the development of modern industry and the increase in the number of gasoline and diesel vehicles, the atmospheric environment continues to deteriorate, and the pollution situation of carbon monoxide, nitrogen oxides, and particulate matter (soot) is becoming increasingly severe. These substances not only cause damage to the atmospheric environment, but also seriously endanger human health. Catalytic technology is therefore widely used in the field of atmospheric environmental governance. [0003] The current technology for carbon monoxide treatment is mainly c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01D53/94
CPCB01D53/94B01J23/50B01J23/83B01J23/89
Inventor 邹谷初上官文峰
Owner SHANGHAI FLORY ENVIRONMENT TECH CO LTD
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