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Preparation method and slurry of denitration integral type catalyst

A monolithic catalyst, catalyst technology, applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve problems such as increasing production cost and environmental pollution, achieve suitable for large-scale production, reduce production cost, shorten The effect of the preparation process

Inactive Publication Date: 2011-08-17
广州市威格林环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to make the coating have better adhesion and uniformity in the slurry preparation of traditional monolithic catalysts, a large amount of organic solvents are generally used, which will not only greatly increase the production cost, but also easily cause environmental pollution during the production process

Method used

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  • Preparation method and slurry of denitration integral type catalyst
  • Preparation method and slurry of denitration integral type catalyst
  • Preparation method and slurry of denitration integral type catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The fired cordierite honeycomb ceramics were weighed. Catalyst V 2 o 5 / WO 3 / TiO 2 After grinding, 8 grams were dispersed in a solution made of 4 grams of water and 8 grams of 20% silica gel, and stirred for 0.5 hour to prepare a slurry with a catalyst content of 40%. Immerse the carrier cordierite honeycomb ceramics in the above slurry, take it out slowly after 5 minutes, dry the residual liquid with an ear washing ball, age at room temperature for 8 hours, dry at 110°C for 4 hours, and then put it in a muffle furnace at 2°C / min The temperature was raised to 550° C. for 2 hours and calcined to obtain a monolithic catalyst for denitration, which was weighed to determine the coating amount.

Embodiment 2

[0021] The fired cordierite honeycomb ceramics were weighed. Catalyst V 2 o 5 / WO 3 / TiO 2 After grinding, 8 grams were dispersed in a solution made of 8 grams of water and 8 grams of 20% silica gel, and stirred for 1.5 hours to prepare a slurry with a catalyst content of 33.3%. Immerse the carrier cordierite honeycomb ceramics in the above slurry, take it out slowly after 5 minutes, dry the residual liquid with an ear washing ball, age at room temperature for 8 hours, dry at 110°C for 4 hours, and then put it in a muffle furnace at 2°C / min The temperature was raised to 550° C. for 2 hours and calcined to obtain a monolithic catalyst for denitration, which was weighed to determine the coating amount.

Embodiment 3

[0023] The fired cordierite honeycomb ceramics were weighed. Catalyst V 2 o 5 / WO 3 / TiO 2 After grinding, 6.4 g was dispersed in a solution made of 8 g of water and 8 g of 20% silica gel, and stirred for 1.5 hours to prepare a slurry with a catalyst content of 28.6%. Immerse the carrier cordierite honeycomb ceramics in the above slurry, take it out slowly after 5 minutes, dry the residual liquid with an ear washing ball, age at room temperature for 8 hours, dry at 110°C for 4 hours, and then put it in a muffle furnace at 2°C / min The temperature was raised to 550° C. for 2 hours and calcined to obtain a monolithic catalyst for denitration, which was weighed to determine the coating amount.

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PUM

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Abstract

The invention provides slurry for preparing a denitration integral type catalyst, which comprises a catalyst, silica gel and water. The invention also provides a method for preparing the denitration integral type catalyst by using a dipping method. Compared with the prior art, the slurry of the invention does not include any organic solvent, is simple and environmental-friendly and can reduce theproduction cost. The prepared integral type catalyst has higher denitration activity and wider temperature window, the coating amount of the catalyst can be realized by adjusting the concentration ofthe catalyst in the slurry liquor and the target coating amount can be obtained by only one-time coating so that the preparation process is greatly shortened, the production cost is greatly reduced and large-scale production can be carried out.

Description

technical field [0001] The invention relates to the field of catalytic materials for nitrogen oxide reduction, in particular to a method for preparing a monolithic catalyst for denitrification and its simple and environmentally friendly slurry. Background technique [0002] In recent years, diesel engines have been favored for their excellent fuel economy and power performance, but one of the biggest problems of diesel engines is the serious emission of nitrogen oxides. Nitrogen oxides include NO, NO 2 , N 2 O, N 2 o 3 , N 2 o 4 and N 2 o 5 etc., the NO produced during the combustion of various fuels x Mainly NO, accounting for about 90% to 95%, NO 2 5% to 10%, N 2 O only accounts for about 1%, NO and NO 2 Collectively referred to as NO x . Nitrogen oxides (NO x ) pollution of the atmosphere is a worldwide environmental problem, and its impact is mainly manifested in the formation of acid rain, photochemical smog, near-surface atmospheric ozone pollution, green...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J37/02B01J32/00B01J35/04B01D53/94B01D53/56
Inventor 萧剑鸣赵向云韩晖汪加林刘定学计美香范群
Owner 广州市威格林环保科技有限公司
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