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NO oxidation catalyst for removing NOx in ship and preparation method of NO oxidation catalyst

A technology of oxidation catalyst and deionized water, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. It can solve the problem of large footprint and high quality of SCR catalyst. problem, to achieve the effect of small footprint, solve the problem of insufficient layout space, and good high temperature activity

Pending Publication Date: 2022-06-07
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a ruthenium-aluminum-cerium-zirconium catalyst for NO oxidation in a fast SCR method for removing NOx from ships and a preparation method thereof in order to improve the problems of traditional SCR catalysts such as large quality and large floor space

Method used

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  • NO oxidation catalyst for removing NOx in ship and preparation method of NO oxidation catalyst
  • NO oxidation catalyst for removing NOx in ship and preparation method of NO oxidation catalyst

Examples

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Effect test

Embodiment 1

[0025] Accurately weigh Ce(NO) with a mass of 12.6 g 3 ) 3 ·6H 2 O powder and 8.1 g of Zr (NO 3 ) 4 ·5H 2 O powder, dissolve in a certain amount of deionized water and mix well. The above solution was placed in an ultrasonic device and stirred, heated in a water bath at 70°C until transparent, and then 1 mol / L sodium hydroxide solution was added until the pH value was 12-13 to obtain a precipitated viscous substance and continued stirring for 2 hours, and then 7.5 g of sodium hydroxide solution was added. γ-Al 2 O 3 powder, continue to stir for 2h, and the obtained viscous substance is placed in a ceramic suction filtration device and washed to neutrality. The obtained neutral substance was oven-dried, calcined in a muffle furnace at 600° C. for 3 hours, and ground to powder to obtain the target catalyst carrier powder. Put 29.2ml of RuCl 3 ·6H 2 O (4g / L) solution, dissolved in a certain amount of deionized water, then added the prepared carrier powder, stirred and m...

Embodiment 2

[0027] Accurately weigh Ce(NO) with a mass of 12.6 g 3 ) 3 ·6H 2 O powder, 8.1 g of Zr (NO 3 ) 4 ·5H 2 O powder and 7.5 g of γ-Al 2 O 3 Powder, dissolve in a certain amount of deionized water and mix well. The above solution was placed in an ultrasonic device and stirred, heated in a water bath at 70°C, and then 1 mol / L sodium hydroxide solution was added to adjust the pH to 12-13 to obtain a precipitated viscous substance and continue stirring for 2 hours. The ceramic suction filtration device is washed to neutrality. The obtained neutral substance was oven-dried, calcined in a muffle furnace at 600° C. for 3 hours, and ground to powder to obtain the target catalyst carrier powder. Put 29.2ml of RuCl 3 ·6H 2 O (4g / L) solution, dissolved in a certain amount of deionized water, then added the prepared carrier powder, stirred and mixed in an ultrasonic device, heated in a water bath at 70°C, stirred for 3h, and moved to an oven to dry at 550 ℃ temperature muffle furna...

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Abstract

The invention relates to an NO oxidation catalyst for removing NOx in a ship and a preparation method thereof, and belongs to the field of SCR (Selective Catalytic Reduction) catalysis. The preparation method comprises the following steps: firstly, weighing raw materials through stoichiometry, sequentially adding a precursor of Al and an alkali solution in the raw material adding process, dissolving, heating in a water bath, stirring, drying, and roasting at 550-800 DEG C to obtain a carrier of a target catalyst; and dissolving a precursor of Ru in deionized water, adding the prepared carrier sample by an impregnation method, dissolving, heating in a water bath, stirring, drying in a drying oven, and roasting at 350-600 DEG C to obtain the target catalyst. The obtained catalyst has relatively good high-temperature activity and certain sulfur-resistant and water-resistant performance, and can meet the industrial application of removing NOx through rapid SCR of ship flue gas.

Description

technical field [0001] The invention relates to a method for removing NO from ship flue gas x The NO oxidation catalyst and preparation method thereof belong to the technical preparation field of fast SCR catalyst. Background technique [0002] With the development of the economy, due to its strong carrying capacity and low operating costs, the number of ships in river-sea transportation has become increasingly large. As the power system of ships, the nitrogen oxides produced by diesel engines are one of the important sources of air pollution. Nitrogen oxides are the most dangerous substances involved in environmental hazards. They can cause photochemical smog, acid rain, ozone layer destruction and greenhouse effect, etc., which are harmful to the natural environment and human health. Therefore, the treatment of nitrogen oxides is urgent at present. [0003] Due to the limited space of the ship itself, the traditional SCR occupies a large area, which is not suitable for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J37/08B01D53/94B01D53/90
CPCB01J23/63B01J23/002B01J37/088B01D53/9413B01D53/90B01J2523/00B01D2257/404B01D2258/01B01J2523/31B01J2523/3712B01J2523/48B01J2523/821Y02A50/20
Inventor 李坚颜海樱李双叶樊星
Owner BEIJING UNIV OF TECH
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