Cu/ETS-10 supported SCR catalyst synthesis method

A SCR catalyst and supported technology, which is applied in the synthesis field of supported SCR catalyst Cu/ETS-10, can solve the problems of difficult control of the content and high alkali metal content, and achieve the characteristics of regular micropore structure, simple preparation process and low preparation conditions easily controlled effects

Active Publication Date: 2013-09-04
北京方信立华科技有限公司
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Problems solved by technology

This method prepares molecular sieve supported catalyst Cu / ETS-10, which overcomes the disadvantages of high alkali metal content and difficult control of the content in the traditional method.

Method used

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  • Cu/ETS-10 supported SCR catalyst synthesis method
  • Cu/ETS-10 supported SCR catalyst synthesis method
  • Cu/ETS-10 supported SCR catalyst synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 107 g of ammonium nitrate in 1300 ml of deionized H 2 O, stirred until completely dissolved, then added 20g of ETS-10 powder, and stirred in an oil bath at 85°C for 10h. After standing to cool, suction filter and dry to obtain 1# carrier ETS-10.

[0022] Using copper acetate solution as raw material, by impregnation method, the mass ratio of deionized water: 1# carrier ETS-10 is 5:1, and the solvent is evaporated in a water bath at 70°C to prepare a catalyst loaded with 5.0wt.% Cu / ETS-10. After drying at 120°C for 12 hours and calcining at 500°C for 4 hours, the catalyst prepared by the impregnation method is marked as 1#M, and its Langmuir specific surface is 536m 2 / g.

Embodiment 2

[0024] Dissolve 64.2 g of ammonium nitrate in 780 ml of deionized H 2 O, stir until completely dissolved, add 12g of 1# carrier ETS-10, and stir in an oil bath at 85°C for 10h. After standing to cool, suction filter and dry to obtain 2# carrier ETS-10.

[0025] Using copper acetate solution as raw material, by impregnation method, the mass ratio of deionized water: 2# carrier ETS-10 is 5:1, and the solvent is evaporated in a water bath at 70°C to prepare a catalyst loaded with 5.0wt.% Cu / ETS-10. After drying at 120°C for 12 hours and calcination at 500°C for 4 hours, the catalyst prepared by the impregnation method was marked as 2#M, and its Langmuir specific surface was 512m 2 / g.

Embodiment 3

[0027] Dissolve 42.8 g of ammonium nitrate in 520 ml of deionized H 2 O, stirred until completely dissolved, then added 8g of 2# carrier ETS-10, and stirred in an oil bath at 85°C for 10h. After standing to cool, suction filter and dry to obtain 3# carrier ETS-10.

[0028]Using copper acetate solution as raw material, the mass ratio of deionized water: 3# carrier ETS-10 is 5:1, and the solvent is evaporated under the condition of 70 ℃ water bath by dipping method to prepare the supported 5.0wt.% Cu / ETS-10 catalyst, After drying at 120℃ for 12h and calcining at 500℃ for 4h, the catalyst prepared by impregnation method was marked as 3#M, and its Langmuir specific surface was 514m 2 / g.

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Abstract

A novel Cu/ETS-10 supported SCR catalyst synthesis method belongs to the technical field of molecular sieve type SCR catalysts. The method comprises the following steps: carrying out different-time ion exchange of a support ETS-10 by a 0.05-1mol/L aqueous solution of ammonium salt to prepare ETS-10 having different contents of alkali metals (Na and K); and preparing an aqueous solution containing a certain amount of copper acetate or copper nitrate, adopting a traditional dipping process, and calcining at 450-550DEG C for 2-5h to prepare the supported Cu/ETS-10 catalyst. The catalyst prepared in the invention has the advantages of cheap and easily available raw materials, simple preparation process, mild reaction condition, high specific surface area and good catalytic activity.

Description

technical field [0001] The invention relates to a synthesis method of a supported SCR catalyst Cu / ETS-10, belonging to the technical field of molecular sieve SCR catalysts. Background technique [0002] With the acceleration of urbanization and industrialization, it is greatly facilitating people's social production and life. It also brings a series of environmental and ecological problems. The most prominent one is the serious pollution of the environment. For example, the number of days of urban smog continues to increase, which seriously affects people's normal life and work. At present, automobile exhaust and industrial emissions have become the main sources of air pollution control, and nitrogen oxides (NOx) are one of the main pollutants. The treatment of NOx is an important issue in current environmental governance. Based on this, the state put forward plans and requirements for controlling nitrogen oxide emissions in the "Twelfth Five-Year Plan". How to achieve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89
Inventor 何洪宋丽云张桂臻
Owner 北京方信立华科技有限公司
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