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Preparation method of catalyst for simultaneously removing NO and fine particles in coal-fired flue gas

A coal-burning flue gas and fine particle technology, which is applied in the field of catalyst preparation, can solve the problems of rare glass fibers and lack of porosity, and achieve the effects of reduced wear and poisoning, simple operation, and excellent sulfur resistance

Inactive Publication Date: 2013-12-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] To sum up, in recent years, there have been many domestic and foreign invention patents on the preparation of new catalysts for catalytic reduction (SCR) NOx removal, but few use glass fibers without porosity as catalyst carriers.

Method used

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  • Preparation method of catalyst for simultaneously removing NO and fine particles in coal-fired flue gas
  • Preparation method of catalyst for simultaneously removing NO and fine particles in coal-fired flue gas

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Embodiment

[0033] The preparation process of the catalyst for simultaneous removal of NO and fine particles in coal-fired flue gas is as follows:

[0034] Step 1): Modified alkali-free glass fiber cloth: Soak the alkali-free glass fiber cloth (Shanghai Yaohong Glass Fiber Co., Ltd., EW25) in soapy water (prepared by soaking ordinary soap in water for 20 minutes at room temperature) for 20 minutes to wash Dry, then soak in 2mol / L hydrochloric acid for 30min at 50℃, wash, dry, and set aside after mild corrosion;

[0035] Step 2): Support catalyst: use Mn(NO 3 ) 2 And Ce(NO 3 ) 3 Of the mixed solution impregnation step 1) prepared alkali-free glass fiber cloth, Mn (NO 3 ) 2 And Ce(NO 3 ) 3 The mixing concentration of the mixed solution is 0.02mol / L, and the molar ratio of Mn to Ce is 1:5;

[0036] The specific method of impregnation is as follows: firstly soak the alkali-free glass fiber cloth prepared in step 1) in Mn(NO 3 ) 2 And Ce(NO 3 ) 3 In the mixed solution for 24 hours, then soak at 50°C ...

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Abstract

The invention discloses a preparation method of a catalyst for simultaneously removing NO and fine particles in coal-fired flue gas. The preparation method of the catalyst for simultaneously removing NO and fine particles in coal-fired flue gas is characterized by comprising the concrete steps of firstly, soaking alkali-free glass fiber cloth by using soap water for 20min, washing and airing, then, soaking the alkali-free glass fiber cloth into hydrochloric acid with the concentration of 2mol / L at the temperature of 50 DEG C for 30min, slightly corroding the alkali-free glass fiber cloth, and then, washing and airing for later use; next, steeping the alkali-free glass fiber cloth by using Mn(NO3)2 and Ce(NO3)3 solutions; and finally, decomposing the alkali-free glass fiber cloth in an air environment of 200 DEG C for 4h to obtain CeO2 and MnOx. The preparation method can be used for realizing the low-temperature (150 DEG C) simultaneous removal of NO and fine particles in coal-fired flue gas, and is convenient in catalyst recovery, strong in sulfur resistance, greatly reduced in operation cost and remarkable in environment benefit.

Description

Technical field [0001] The invention belongs to the field of purification of coal-fired flue gas, and particularly relates to a preparation method of a catalyst that simultaneously removes NO and fine particles in coal-fired flue gas. Background technique [0002] The problem of NO pollution in energy utilization is becoming more and more serious. Countries all over the world have established strict environmental standards for NOx emissions to control NO emissions. Almost 95% of NOx in coal-fired flue gas is in the form of NO. Therefore, how to effectively eliminate NO in the flue gas of power plants has become an important topic in environmental protection. Among many NO control technologies, the SCR method is widely used in various countries around the world due to its mature and reliable, high denitrification efficiency, good selectivity, and high cost performance. Take NH 3 The SCR method as a reducing agent is an effective method to remove NO in the flue gas of a power pla...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J32/00B01J35/10B01D53/90B01D53/56B01D46/02
Inventor 刁永发李乐刘鑫李攀
Owner DONGHUA UNIV