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Desulphurization and denitration catalyst and preparation method thereof

A desulfurization, denitrification and catalyst technology, which is applied in the field of air pollution control, can solve the problems of difficulty in large-scale promotion, unindustrialized catalyst wear resistance, and high operating costs, and achieves the effects of easy acquisition, good desulfurization and denitrification effect, and low cost.

Inactive Publication Date: 2009-09-02
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, it is difficult to promote it on a large scale in China due to its high operating cost, and the existing catalysts (including activated carbon and CuO / γ-Al 2 o 3 ), due to problems in sulfur capacity, catalyst wear resistance, etc., it has not been industrialized so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Measure 100mL of distilled water, place it in an oil bath at 75°C to keep warm, then weigh 20g of aluminum isopropoxide powder and add it slowly, stir at the same time during the addition until the liquid is a white suspension, and then drop in 1mol / L nitric acid The solution was evaporated to the air for 1 hour until the suspension turned into a colorless viscous liquid to obtain a boehmite sol. Measure 2.7mL of 1mol / L copper nitrate solution, and add 0.086g of Na 2 O and CeO 2 powder, add the mixed solution to the prepared boehmite sol, drop in 1mol / L nitric acid solution, and stir until it becomes a paste, age for 20 minutes, and aggregate into a semi-gel; use a dropper to remove the prepared semi-gel Drop it into a gel pool containing ammonia water and liquid paraffin with a diameter of 3mm, and age it for 1 hour to obtain a wet gel. Dry the wet gel in a vacuum oven at 40°C, and then bake it at 350°C for 5 The catalyst was obtained in hours, and the composition of...

Embodiment 2

[0022] Measure 100mL of distilled water, place it in an oil bath at 80°C to keep warm, then weigh 15g of aluminum isopropoxide powder and add it slowly, stir at the same time during the addition until the liquid is a white suspension, and then drop in 1mol / L nitric acid solution until the suspension turned into a colorless viscous liquid, and evaporated in air for 2 hours to obtain a boehmite sol. Measure 5.3mL of 1mol / L copper nitrate solution, and add 0.052g of MnO 2 and CeO 2 Powder, add the mixed solution to the prepared boehmite sol, drop in 1mol / L nitric acid solution, and stir until it becomes a paste, age for 30 minutes, and aggregate into a semi-gel; use a dropper to remove the prepared semi-gel Drop it into a gel pool containing ammonia water and liquid paraffin with a diameter of 4mm, and age for 2 hours to obtain a wet gel. Put the wet gel into a vacuum oven at 60°C to dry, and then bake it at 400°C for 4 Hours to obtain the catalyst, wherein the prepared catalys...

Embodiment 3

[0024] Measure 100mL of distilled water, place it in an oil bath at 85°C to keep warm, then weigh 10g of aluminum isopropoxide powder and add it slowly, stir at the same time during the addition until the liquid is a white suspension, then drop in 1mol / L nitric acid The solution was evaporated to the air for 1 hour until the suspension turned into a colorless viscous liquid to obtain a boehmite sol. Measure 4.5mL of 1mol / L copper nitrate solution, and add 0.040g of V 2 o 5 powder, add the mixed solution to the prepared boehmite sol, drop in 1mol / L nitric acid solution, stir at the same time until it becomes a paste, age for 50 minutes, and aggregate into a semi-gel; use a dropper to remove the prepared semi-gel Drop it into a gel pool containing ammonia water and liquid paraffin with a diameter of 5mm, and age it for 1 hour to obtain a wet gel. Dry the wet gel in a vacuum oven at 80°C, and then bake it at 450°C for 6 The catalyst was obtained in hours, and the composition of...

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Abstract

The invention discloses a desulphurization and denitration catalyst. The catalyst comprises the following components by mass percentage: 4 to 18 percent of CuO, 80 to 95 percent of gamma-Al2O3, and 1 to 2 percent of promoter. A method for preparing the catalyst comprises the following steps: (1) adding aluminum isopropoxide into distilled water, stirring the mixture, adding a nitric acid solution into the mixture dropwise, and carrying out the evaporation in the air to obtain a boehmite sol; (2) adding the promoter into a copper nitrate solution, then adding the mixture into the boehmite sol, then adding the nitric acid solution dropwise, stirring the mixed solution for ageing, and aggregating the mixed solution into a semi-gel; and (3) adding the semi-gel dropwise into a gel pool containing ammonia water and liquid paraffin through a dropper, and obtaining the catalyst after ageing, drying and baking. The prepared catalyst can be used for synchronous desulphurization and denitration, and can be regenerated and used cyclically with low raw material cost. As the byproducts can be reutilized, the catalyst brings about no 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 flue gas 2 and NO X Gas catalyst and its preparation process, wherein NO X Represents the various forms of 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 NO X gas. With the rapid development of my country's national economy, SO 2 and NO X The emission of gas continues to increase, causing serious pollution to the atmospheric environment. Environmental problems have become a key issue affecting the sustainable development of my country's national economy. Therefore, under the condition of limited national strength, it is urgent to vigorously develop low-cost pollution prevention and control technologies. At the same time, the desulfurizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J21/04B01J23/78B01J23/83B01J23/847B01J23/889B01D53/50B01D53/56B01D53/86
Inventor 向军孙路石赵清森胡松王乐乐
Owner HUAZHONG UNIV OF SCI & TECH
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