Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of denitration catalyst

A technology of denitrification catalyst and carbon black powder, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of affecting the mechanical strength of the catalyst coating and the difficulty of taking into account the preparation technology, so as to achieve enhanced strength , prolong life, improve the effect of activity

Active Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, further increasing the number of macropores in the coating can improve the reaction space of the catalyst and the ability to resist fly ash and salt poisoning, and the increase in the number of macropores will inevitably affect the mechanical strength of the catalyst coating. It can be seen that the macropores There is an insoluble contradiction between the quantity and the mechanical strength of the coating, and it is difficult for conventional preparation techniques to balance these two problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of denitration catalyst
  • Preparation method of denitration catalyst
  • Preparation method of denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Cordierite pretreatment: completely immerse cordierite honeycomb ceramics in 5wt% nitric acid solution for 1 hour, rinse with deionized water for 3 times after taking it out, put it in an oven at 120°C, and dry it for 10 hours to obtain Surface activated cordierite honeycomb ceramic support.

[0034] The preparation process of the aluminum sol is as follows: 20 grams of pseudoboehmite is added to 150 mL of deionized water, and 7 grams of concentrated nitric acid is added dropwise while stirring. After stirring for a certain period of time, heat to 80°C, add nitric acid dropwise until completely peptized, control the pH value of the solution at 2-5, and age for 24 hours to obtain a transparent aluminum sol with a content of 8wt% based on alumina.

[0035]Preparation of the active component liquid: add 40 g of manganese nitrate and 10 g of ferric nitrate into 200 ml of deionized water, stir until completely dissolved, and obtain the active component liquid.

[0036] (1) ...

Embodiment 2

[0041] Cordierite pretreatment: with embodiment 1.

[0042] Aluminum sol is commercially available (15% solid content).

[0043] Preparation of the active component liquid: add 50 g of manganese nitrate and 10 g of ferric nitrate to 200 ml of deionized water and stir until completely dissolved to obtain the active component liquid.

[0044] (1) Add the carbon black powder to the ethanol solution containing tetraethyl orthosilicate (where the solid-liquid mass ratio is 1:8, and the tetraethyl orthosilicate is SiO 2 The mass ratio of meter to carbon black powder is 3:1), under the condition of ultrasonic dispersion (the energy density of ultrasonic dispersion is 0.8kW / L, the temperature of ultrasonic dispersion is 45°C, and the time of ultrasonic dispersion is 1 hour), mix well, filter, The solid phase was dried at 50° C. for 2 hours, and then dried to obtain silicon source-modified carbon black powder;

[0045] (2) Mix the carbon black powder and aluminum sol obtained in step...

Embodiment 3

[0049] Cordierite pretreatment: with embodiment 1.

[0050] Aluminum sol preparation: same as embodiment 1.

[0051] Preparation of the active component liquid: add 60 g of manganese nitrate and 10 g of ferric nitrate into 200 ml of deionized water, stir until completely dissolved, and obtain the active component liquid.

[0052] (1) Add the carbon black powder to the ethanol solution containing tetraethyl orthosilicate (the solid-to-liquid mass ratio is 1:20, and the tetraethyl orthosilicate is SiO 2 The mass ratio of meter to carbon black powder is 4:1), under the conditions of ultrasonic dispersion (the energy density of ultrasonic dispersion is 2kW / L, the temperature of ultrasonic dispersion is 30°C, and the time of ultrasonic dispersion is 1 hour), mix evenly, filter, and solidify Dry at 60°C for 2 hours, and dry to obtain silicon source-modified carbon black powder;

[0053] (2) Mix the carbon black powder and aluminum sol obtained in step (1) evenly according to a mas...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a denitration catalyst. The preparation method comprises the following steps: (1) adding carbon black powder into an ethanol solution containing a silicon source, performing even dispersing under ultrasonic dispersion conditions, performing solid-liquid separation, and performing drying treatment on the solid phase, so as to obtain silicon-source-modified carbon black powder; (2) uniformly mixing the carbon black powder obtained in the step (1) with an aluminum sol to obtain a coating slurry; (3) dipping a pretreated cordierite honeycomb ceramicsubstrate into the coating slurry for treatment, taking out the treated matrix, blowing away residual slurry, performing drying, and then performing high-temperature treatment in an oxygen-free atmosphere to obtain a coated cordierite honeycomb ceramic matrix; and (4) dipping the carrier obtained in the step (3) in an impregnation solution containing active components, performing drying, and performing roasting, so as to obtain a final product. The denitration catalyst coating prepared by the method of the invention contains more macropores while ensuring certain mechanical strength, the denitration catalyst has good denitration activity, stability and anti-toxicity performance, and the preparation process is simple and is suitable for industrial application.

Description

technical field [0001] The invention relates to a preparation method of a denitration catalyst. Background technique [0002] NO x It is the main pollutant that forms acid rain, photochemical smog and atmospheric ozone layer destruction. During the "Twelfth Five-Year Plan" period, it has been clearly requested that NO x Realize total control. The "Emission Standards of Air Pollutants for Thermal Power Plants" implemented in 2012 requires NO x Emission limit is 100mg / m 3 . Therefore, how to effectively remove nitrogen oxides in flue gas has become an urgent problem to be solved. In the current denitrification technology, selective catalytic reduction (SCR) uses reducing agents such as ammonia to selectively reduce NO in exhaust gas through the action of catalysts. x Reductive conversion to N that is harmless to the atmosphere 2 and H 2 O, with the characteristics of good selectivity and high efficiency, has become the most widely used flue gas denitrification technol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J21/16B01J23/889B01J37/02B01D53/86B01D53/90B01D53/56
Inventor 刘淑鹤王学海程明珠王宽岭陈高升
Owner CHINA PETROLEUM & CHEM CORP