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Desulfuration and denitration catalyst and preparation method thereof

A desulfurization, denitrification and catalyst technology, which is applied in the field of catalysts for SO2 and NOx gases, can solve the problems of unindustrialized catalyst wear resistance and high operating costs, and achieve good desulfurization and denitrification effects, low cost and strong activity.

Inactive Publication Date: 2010-08-11
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

[0023] Weigh 5gCuO, 3gNiO and 2gNa 2 O, fully ground into powder, add 80g of alumina active agent, 10g of diatomite binder and 5g of sawdust pore-forming agent to mix, send it into the mixer / bonding machine, slowly add water, and stir until the mixture is added into a paste. Put the mixture into the mold of the molding machine to form Raschig rings. The shaped mixture was then dried in an oven at 105°C for 4 hours, and finally sent to a muffle furnace for calcination at 450°C for 3 hours to activate the Raschig ring catalyst. The outer dimensions are 14mm outer diameter, 3mm inner diameter, 14mm long, the bulk density is 0.8g / mL, the wear rate is less than 0.4%, and the mechanical strength is more than 80N / cm 2 .

Embodiment 2

[0025] Weigh 15gCuO, 2gNiO, 2gNa 2 O, 1g ZnO, fully ground into powder, add 70g of alumina active agent, 10g of diatomite binder, 5g of sawdust pore-forming agent and mix, send it into the mixing / bonding machine, slowly add water, and stir while adding until the mixture becomes a paste. Put the mixture into the mold of the molding machine and shape it into a cylindrical catalyst of Φ16mm×16mm. The formed mixture was then dried in an oven at 105°C for 4 hours, and finally sent to a muffle furnace for 5 hours at 550°C to be activated to form a cylindrical catalyst.

Embodiment 3

[0027] Weigh 10gCuO, 1gNiO, 1gNa 2 O, 1g ZnO, fully ground into powder, add 75g of alumina active agent, 10g of diatomite binder, 5g of sawdust pore-forming agent, mix it, send it into the mixing / bonding machine, slowly add water, and stir while adding until the mixture becomes a paste. Put the mixture into the mold of the molding machine and shape it into a cylindrical catalyst of Φ16mm×16mm. The shaped mixture was then dried in an oven at 105°C for 4 hours, and finally sent to a muffle furnace for calcination at 600°C for 4 hours to activate and form a cylindrical catalyst.

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Abstract

The invention discloses a desulfuration and denitration catalyst, which comprises the following components in percentage by weight: 5-15% of CuO, 80-90% of gamma-Al2O3 and 2-5% of catalyst promoter (Na2O, NiO or ZnO). The preparation method of the catalyst comprises the following steps: (1) mixing main catalyst CuO, catalyst promoter, carrier Al2O3, kieselguhr adhesive and wood-dust pore forming agent, adding water, and completely stirring into paste; (2) molding into cylindrical bodies, spherical bodies or Raschig ring bodies; and (3) drying, calcining, and activating to prepare into the catalyst. The prepared catalyst can realize the desulfuration and the denitration simultaneously, is low in the material cost, and can be recycled. Besides, the byproducts can be recycled, thereby being free of the 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 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. 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 desulfurization and denitrification technology has huge economic advantages, and is...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/80B01D53/86B01D53/60
Inventor 向军孙路石胡松苏胜谢天曹蕃
Owner HUAZHONG UNIV OF SCI & TECH
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