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Ceramic membrane denitration and dioxin removal catalyst taking sludge and steel slag as raw materials and preparation method thereof

A catalyst and ceramic membrane technology, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem that particulate matter easily blocks catalyst pores, hinders the development and application of simultaneous denitration and dedioxin catalysts, etc. Achieve excellent redox performance, excellent oxygen storage and release performance, and efficient catalytic removal.

Active Publication Date: 2020-10-09
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of this type of catalyst is honeycomb. During use, particles can easily block the pores of the catalyst, which hinders the further development and application of simultaneous denitrification and dedioxin catalysts.

Method used

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  • Ceramic membrane denitration and dioxin removal catalyst taking sludge and steel slag as raw materials and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Raw material crushing

[0033] The steel slag and the metatitanic acid powder are respectively pulverized by a ball mill, passed through a 100-mesh standard sieve and homogenized for later use;

[0034] (2) Ingredients and granulation

[0035] Weigh 20g of steel slag powder and 50g of metatitanic acid powder and stir evenly, then weigh 20g of domestic sludge and 10g of polyvinyl alcohol solution and mix with the above powder for grinding and granulation;

[0036] (3) Molding and calcination

[0037] Weigh 10 g of the granulated mud and add it to the mold, pressurize to 4 MPa, take out the sample after holding the pressure for 2 minutes, and repeat the molding of the green body 10 times to obtain 10 ceramic membrane green bodies with a diameter of 25 mm. Placed in a muffle furnace and kept at 1000°C for 4 hours for calcination to obtain a ceramic membrane carrier;

[0038] (4) Preparation of active component and cocatalyst precursor composite solution

[0039] We...

Embodiment 2

[0045] (1) Raw material crushing

[0046] The steel slag and the metatitanic acid powder are respectively pulverized by a ball mill, passed through a 100-mesh standard sieve and homogenized for later use;

[0047] (2) Ingredients and granulation

[0048] Weigh 10g of steel slag powder and 60g of metatitanic acid powder and stir evenly, then weigh 20g of domestic sludge and 10g of polyvinyl alcohol solution and mix with the above powder for grinding and granulation;

[0049] (3) Molding and calcination

[0050] Weigh 10 g of the granulated mud and add it to the mold, pressurize to 6 MPa, take out the sample after holding the pressure for 2 minutes, and repeat the green body molding 10 times to obtain 10 ceramic membrane green bodies with a diameter of 25 mm. Placed in a muffle furnace and kept at 1200°C for 4 hours for calcination to obtain a ceramic membrane carrier;

[0051] (4) Preparation of active component and co-catalyst precursor composite solution

[0052] Weigh 24...

Embodiment 3

[0058] (1) Raw material crushing

[0059] The steel slag and the metatitanic acid powder are respectively pulverized by a ball mill, passed through a 100-mesh standard sieve and homogenized for later use;

[0060] (2) Ingredients and granulation

[0061] Weigh 20g of steel slag powder and 60g of metatitanic acid powder and stir evenly, then weigh 10g of domestic sludge and 10g of polyvinyl alcohol solution and mix with the above powder for grinding and granulation;

[0062] (3) Molding and calcination

[0063] Weigh 10 g of the granulated mud and add it to the mold, pressurize to 6 MPa, take out the sample after holding the pressure for 2 minutes, and repeat the green body molding 10 times to obtain 10 ceramic membrane green bodies with a diameter of 25 mm. Placed in a muffle furnace and kept at 1000°C for 4 hours for calcination to obtain a ceramic membrane carrier;

[0064] (4) Preparation of active component and co-catalyst precursor composite solution

[0065] Weigh 9....

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Abstract

The invention discloses a ceramic membrane denitration and dioxin removal catalyst taking sludge and steel slag as raw materials and a preparation method thereof, and belongs to the field of waste product resource utilization and environment-friendly catalysis. According to the catalyst, a ceramic membrane prepared from polluting steel slag discharged from the steelmaking industry, domestic sludgeof urban sewage treatment plants, titanium source powder and a forming agent solution is used as a carrier, a tungsten-zirconium composite oxide is used as a catalytic active component, and a nickel-cobalt composite oxide is used as a cocatalyst. The ceramic membrane catalyst not only can realize resource utilization of industrial waste slag steel slag and domestic sludge of residents, but also is environment-friendly, and can realize denitration and dioxin removal at the same time.

Description

technical field [0001] The invention relates to providing a ceramic membrane denitration and dedioxin catalyst using sludge and steel slag as raw materials and a preparation method thereof, which belongs to the field of resource utilization of waste products and environmental protection catalysis. Background technique [0002] Steel slag is waste slag produced in the metallurgical industry, and its production rate is 8% to 15% of crude steel production. In 2012, the amount of steel slag discharged in the world was about 180 million tons. The amount of steel slag produced in China is increasing rapidly with the rapid development of the iron and steel industry. Therefore, the treatment and resource utilization of waste slag in iron and steel enterprises have also been paid more and more attention. The national "Eleventh Five-Year" development plan pointed out that the comprehensive utilization rate of steel slag should reach more than 86%, and basically realize "zero emission"...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J35/02B01D53/86B01D53/56B01D53/70
CPCB01J23/002B01J23/888B01J37/0018B01D53/8628B01D53/8662B01J2523/00B01J35/00B01J35/30B01J2523/48B01J2523/69B01J2523/847Y02W30/91
Inventor 沈岳松金奇杰
Owner NANJING UNIV OF TECH
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