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Basic catalyst and preparation method and application thereof

A technology of catalysts and co-catalysts, applied in chemical instruments and methods, chemical elements of heterogeneous catalysts, physical/chemical process catalysts, etc., can solve the problems of occupying land resources, polluting the environment, reducing the life of catalysts, etc., and achieve a higher ratio Surface area, overcoming secondary pollution, and improving the effect of catalytic effect

Active Publication Date: 2021-11-05
NANJING UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of by-products are still mainly stacked in the open air, which not only occupies land resources, but also causes secondary pollution to the environment
In addition, the by-products of desulfurization are not effectively utilized, which will cause waste of resources
Conventional denitrification technology uses NH 3 As a reducing agent, it has the characteristics of high reaction efficiency and good selectivity, but NH 3 High cost, NH 3 Contaminate the environment after escaping
In the conventional denitrification SCR technology, the alkali metal in the fuel can volatilize during the combustion process, form submicron aerosol particles and react with the catalyst, which will cause catalyst poisoning and deactivation, reduce the life of the catalyst, and increase the cost of the SCR system

Method used

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  • Basic catalyst and preparation method and application thereof
  • Basic catalyst and preparation method and application thereof
  • Basic catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a, 20.18g MgCl 2 ·6H 2 O and 4.04g C 12 h 12 o 11 respectively dissolved in 150mL and 25mLH 2 In O, the sucrose solution was slowly added dropwise to the MgCl 2 ·6H 2 O solution and mix well to obtain the mixed solution 1.

[0027] b. Add 0.40gCe(NO 3 ) 3 ·6H 2 O, 0.10gEu(NO 3 ) 3 ·6H 2 O, 0.01g KNO 3 , 0.06g Ca(NO 3 ) 4 4H 2 O was dissolved in 25ml of water and slowly added to the mixed solution 1, placed in a magnetic stirrer at 80°C and stirred at a constant speed for 4 hours to obtain the mixed solution 2;

[0028] c. Add 25ml of ammonia water to the mixed solution 2, place it in a magnetic stirrer at 80°C and stir for 2h at a constant speed, then place it in a blast drying oven at 100°C for heat preservation and drying, then place it in a muffle furnace for 4 hours of roasting at 600°C in an air atmosphere Prepared catalyst, wherein based on the carrier mass, the mass fraction of the active component is 5%, the mass fraction of the promoter is 0.5%...

Embodiment 2

[0031] a, 20.18g MgCl 2 ·6H 2 O and 5.05g C 12 h 12 o 11 respectively dissolved in 150mL and 25mLH 2 In O, the sucrose solution was slowly added dropwise to the MgCl 2 ·6H 2 O solution and mix well to obtain the mixed solution 1.

[0032] b. Add 0.66g Ce(NO 3 ) 3 ·6H 2 O, 0.33gEu(NO 3 ) 3 ·6H 2 O, 0.02g KNO 3 , 0.13g Ca(NO 3 ) 4 4H 2 O was dissolved in 25ml of water and slowly added to the mixed solution 1, placed in a magnetic stirrer at 75°C and stirred at a constant speed for 6 hours to obtain the mixed solution 2;

[0033] c. Add 25ml of ammonia water to the mixed solution 2, place it in a magnetic stirrer at 80°C for 4h at a constant speed, then place it in a blast drying oven at 120°C for heat preservation and drying, and then place it in a muffle furnace for 4h roasting at 550°C in an air atmosphere. Obtain catalyst, wherein take carrier mass as benchmark, the massfraction of active component is 10%, the massfraction of cocatalyst is 1%, the component m...

Embodiment 3

[0036] a, 20.18g MgCl 2 ·6H 2 O and 4.04g C 12 h 12 o 11 respectively dissolved in 150mL and 25mLH 2 In O, the sucrose solution was slowly added dropwise to the MgCl 2 ·6H 2 O solution and mix well to obtain the mixed solution 1.

[0037] b. Add 0.33g CeCl 3 ·6H 2 O, 0.08g EuCl 3 ·6H 2 O, 0.01g KCl, 0.03g CaCl 2 Dissolved in 25ml of water, slowly added to mixed solution 1, placed in a magnetic stirrer at 80°C and stirred at a constant speed for 4 hours to obtain mixed solution 2;

[0038] c. Add 25ml of ammonia water to the mixed solution 2, place it in a magnetic stirrer at 80°C and stir for 2h at a constant speed, then place it in a blast drying oven at 100°C for heat preservation and drying, then place it in a muffle furnace for 4 hours of roasting at 600°C in an air atmosphere Prepared catalyst, wherein based on the carrier mass, the mass fraction of the active component is 5%, the mass fraction of the promoter is 0.5%, and the component mass ratio of cerium ox...

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Abstract

The invention provides a basic catalyst for simultaneously removing CO, NO and SO2 and a preparation method thereof. Magnesium oxide prepared by a precipitation method is used as a carrier, a cerium-europium-loaded composite oxide is used as an active component, and a potassium-calcium composite oxide is added as a cocatalyst component. The catalyst is good in reaction activity and high in alkalinity, NO and SO2 can be adsorbed on the surface of the catalyst at the same time, and CO2, N2 and elementary substance S are generated through CO catalytic reduction of NO and SO2. The problem of alkali poisoning of a conventional SCR denitration catalyst is solved, the byproduct sulfur generated in the reaction is recycled through the solvent CS2, the CS2 solvent is recycled through a distillation process, the cost is low, secondary pollution is avoided, the sulfur recycling rate is high, and the current situation that the sulfur yield is low in China at present is solved.

Description

technical field [0001] The invention relates to the field of air purification, in particular to an alkaline catalyst and its preparation method and application. Background technique [0002] my country is a big energy producing country. At the same time, based on the population base, it has also led to my country becoming a big energy consumer. At present, my country's energy structure is still dominated by coal. Due to the rapid development of my country's economy, especially the rapid development of the electric power and steel industries, Total annual coal consumption has also risen sharply. The combustion of coal produces a large amount of SO 2 and NO X Harmful gases such as harmful gases are the main source of air pollution in our country, and also the main cause of acid rain in our country, which seriously endangers human health and ecological environment. [0003] At present, my country's conventional desulfurization process can be divided into wet, dry and semi-dry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01D53/86B01D53/56B01D53/50B01D53/62
CPCB01J23/10B01J23/002B01D53/8637B01D53/865B01J2523/00B01D2257/302B01D2257/404B01D2257/502B01D2258/0283B01J2523/13B01J2523/22B01J2523/23B01J2523/3712B01J2523/3743Y02A50/20
Inventor 徐海涛计雯钰徐慕涛金奇杰李明波宋静徐梦
Owner NANJING UNIV OF TECH
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