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Desulphurization and denitration catalyst and preparation method thereof

A technology of desulfurization, denitrification, and catalyst, which is applied in the field of air pollution control, can solve the problems of high operating costs, catalyst wear resistance and unrealized industrialization, and achieve low cost, good desulfurization and denitrification effects, and reduce water consumption.

Inactive Publication Date: 2012-05-23
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the electron beam method has been industrialized, due to its high operating costs, it is difficult to promote it on a large scale in China. Problems that have not yet been industrialized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 55-60g activated alumina particles (such as γ-Al 2 o 3 ), put it into a muffle furnace at 200°C and dry overnight to remove crystal water, weigh 50 g after taking it out, and put it into the evaporating flask of a rotary evaporator. Configure metal salt solution, weigh Cu(NO 3 ) 2 ·3H 2 O crystal 12.10g, Fe(NO 3 ) 3 ·3H 2 O crystal 20.20g, (CH 3 COO) 2 Mn 4H 2 O crystal 11.26g, after mixing, add water and stir evenly to make impregnating solution. Pour the prepared impregnating solution into the evaporating bottle and mix it with activated alumina particles, rotate and impregnate for a certain period of time, then heat, reduce pressure, and rotate to evaporate water until there is no obvious water mark on the surface of the alumina particles. The impregnated alumina solid was dried overnight in an oven at 120°C, and then sent to a muffle furnace for calcination at 500°C for 4 hours to obtain the desired catalyst. Catalyst particle diameter Φ3~5mm, specif...

Embodiment 2

[0026] Take 55-60g activated alumina particles (such as γ-Al 2 o 3 ), put it into a muffle furnace at 200°C and dry overnight to remove crystal water, weigh 50 g after taking it out, and put it into the evaporating flask of a rotary evaporator. Configure metal salt solution, weigh Cu(NO 3 ) 2 ·3H 2 O crystal 6.05g, Fe(NO 3 ) 3 ·3H 2 O crystal 10.10g, (CH 3 COO) 2 Mn 4H 2 O crystal 5.63g, after mixing, add water and stir evenly to make impregnating solution. Pour the prepared impregnating solution into the evaporating bottle and mix it with activated alumina particles, rotate and impregnate for a certain period of time, then heat, reduce pressure, and rotate to evaporate water until there is no obvious water mark on the surface of the alumina particles. The impregnated alumina solid was dried overnight in an oven at 120°C, and then sent to a muffle furnace for calcination at 600°C for 3 hours to obtain the desired catalyst. Catalyst particle diameter Φ3~5mm, specific...

Embodiment 3

[0028] Take 55-60g activated alumina particles (such as γ-Al 2 o 3 ), put it into a muffle furnace at 200°C and dry overnight to remove crystal water, weigh 50 g after taking it out, and put it into the evaporating flask of a rotary evaporator. Configure metal salt solution, weigh Cu(NO 3 ) 2 ·3H 2 O crystal 12.10g, Fe(NO 3 ) 3 ·3H 2 O crystal 10.10g, (CH 3 COO) 2 Mn 4H 2 O crystal 11.26g, after mixing, add water and stir evenly to make impregnating solution. Pour the prepared impregnating solution into the evaporating bottle and mix it with activated alumina particles, rotate and impregnate for a certain period of time, then heat, reduce pressure, and rotate to evaporate water until there is no obvious water mark on the surface of the alumina particles. The impregnated alumina solid was dried overnight in an oven at 120°C, and then sent to a muffle furnace for calcination at 450°C for 5 hours to obtain the desired catalyst. Catalyst particle diameter Φ3~5mm, specif...

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Abstract

The invention discloses a low-temperature high-activity desulphurization and denitration catalyst, which comprises the following components in percentage by weight: 5-10% of CuO, 5-10% of Fe2O3, 5-10% of MnO2 and 70-80% of Al2O3. The preparation method of the catalyst comprises the following steps: (1) taking appropriate 95 wt% of Al2O3 particles, drying the particles in a muffle furnace to remove crystal water; (2) preparing copper nitrate, ferric nitrate and manganese acetate impregnating solutions; (3) mixing a carrier and the impregnating solutions, impregnating, heating, decompressing, rotating for evaporation and removing moisture in the mixture; and (4) preparing the carrier via drying, calcination and activation. The prepared catalyst has good activity at low temperature, can desulfurize and denitrate simultaneously, has low material cost and can be recycled, and by-products can be recycled without secondary pollution.

Description

technical field [0001] The invention relates to the field of air pollution control, in particular to a method for simultaneously removing SO in the flue gas under the low temperature condition at the end of the flue gas pipeline of a coal-fired power plant. 2 A catalyst for NOx gas and its preparation process, wherein NOx represents nitrogen oxides. Background technique [0002] The flue gas released by burning fossil fuels (coal, oil, natural gas, etc.) in energy, chemical industry, metallurgy, transportation and other industries contains a large amount of SO 2 and NOx, causing serious air pollution. With the rapid development of my country's national economy, SO 2 and NOx emissions are increasing, and environmental issues have become the key issues affecting the sustainable development of my country's national economy. In recent years, the Chinese government has paid great attention to environmental issues. my country's Environmental Protection Law has clearly stipulate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01D53/60B01D53/86
Inventor 向军孙路石胡松苏胜谢天曹蕃
Owner HUAZHONG UNIV OF SCI & TECH