Low-temperature anti-sulfur denitration catalyst by taking organic porous material as carrier and preparation method thereof

A catalyst and denitrification technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor stability, poor modification, and large skeleton flexibility, and achieve Good low-temperature activity, low density, and the effect of solving easy poisoning

Inactive Publication Date: 2017-08-11
江苏万德环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their composition and bonding method determine that each has corresponding advantages and disadvantages: inorganic porous materials, strong skeleton, good stability, but poor modification; inor...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 10g of carrier PAF-1 and disperse it in 10mL of 0.12mol / L manganese nitrate or manganese acetate or manganese acetate aqueous solution, mechanically stir for 1-2 hours at room temperature to make it evenly mixed, after standing for 1 hour, after filtering After being dried in an oven at 100°C for 4 hours, then baked at 300°C for 3 hours in a nitrogen / argon atmosphere, and after natural cooling, a precursor of manganese oxide loaded on POFs was obtained, wherein the manganese loading amount was 1 wt.%. Take 0.5 g of the above sample and place it in a quartz reactor. Firstly, Ar was passed into it for purging to remove the air and moisture in the reactor, and then switched to H 2 , activated at 200°C for 2h under a hydrogen atmosphere, and then passed through 10vol.%SiH 4 / H 2 The temperature of the mixed gas was programmed to rise to 250°C for silicide reaction for 10 minutes, and then cooled to room temperature under an inert atmosphere to obtain manganese sili...

Embodiment 2

[0035] Mix 42mL of 0.1mol / L manganese nitrate aqueous solution with 21mL of 0.1mol / L cobalt nitrate aqueous solution and stir evenly, weigh 10g of carrier PAF-1 and place it in the above manganese-cobalt mixed aqueous solution, and mechanically stir for 1 to 2 hours to make it Mix evenly, let stand for 2 hours, filter and dry in an oven at 110°C for 4 hours, then bake at 400°C for 4 hours in a nitrogen / argon atmosphere, and after natural cooling, POFs loaded manganese can be obtained A precursor of cobalt oxide, wherein the loading of manganese and cobalt is 5wt.%, and the molar ratio of Mn to Co is 2:1. Take 0.5 g of the above sample and place it in a quartz reactor. Firstly, Ar was passed into it for purging to remove the air and moisture in the reactor, and then switched to H 2 , activated at 200°C for 2h under a hydrogen atmosphere, and then passed through 10vol.%SiH 4 / H 2 The temperature of the mixed gas was programmed to rise to 300°C for silicide reaction for 30 min...

Embodiment 3

[0038] Mix 26 mL of 0.1 mol / L manganese acetate aqueous solution with 52 mL of 0.1 mol / L cerium cerium acetate aqueous solution and stir evenly, weigh 10 g of carrier PAF-1 and place it in the above manganese cerium mixed aqueous solution, and mechanically stir for 1 to 2 hours to make Mix it evenly, let it stand for 2 hours, filter and dry it in an oven at 110°C for 4 hours, then bake it at 400°C in a nitrogen / argon atmosphere for 4 hours, and after natural cooling, the POFs-supported A precursor of manganese-cerium oxide, wherein the loading of manganese-cerium is 10wt.%, and the molar ratio of Mn to Ce is 1:2. Take 0.5 g of the above sample and place it in a quartz reactor. Firstly, Ar was passed into it for purging to remove the air and moisture in the reactor, and then switched to H 2 , activated at 200°C for 2h under a hydrogen atmosphere, and then passed through 10vol.%SiH 4 / H 2 The temperature of the mixed gas was programmed to rise to 500°C for silicification reac...

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PUM

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Abstract

The invention provides a low-temperature anti-sulfur SCR denitration catalyst by taking an organic porous material as a carrier and a preparation method thereof. The method is characterized in that an immersion method is employed, one or more than two of metal element oxides of Mn, Fe, Cu, Co, Ce, and Zr can be loaded on the organic porous material, the material is subjected to silicatization, and the operating temperature of the catalyst is 120-250 DEG C. The catalyst takes the organic porous material with large specific surface area as the carrier, disperse optimization of the active components and catalysis cooperation among the components are realized, so that good low temperature denitration activity can be obtained, after silicatization, active site contact of SO2 and the catalyst can be effectively isolated, problem of easy SO2 poisoning of the low temperature denitration catalyst can be effectively solved, and the method has good prospect in denitration industrialization application of low temperature sulfur-containing flue gas.

Description

technical field [0001] The invention relates to a preparation method of a low-temperature selective catalytic reduction (Selective Catalytic Reduction, SCR) denitrification catalyst using organic porous materials (Porous organic frameworks, POFs) as a carrier, and belongs to the field of air pollution control technology and environmental protection catalytic materials. Background technique [0002] Nitrogen oxides not only cause environmental problems such as acid rain and photochemical smog, but also have adverse effects on human health. Therefore, the emission reduction and treatment of nitrogen oxides is an urgent issue. Take NH 3 Selective catalytic reduction technology as a reducing agent is currently the most effective method for removing NOx from stationary sources in industry. [0003] At present, the most widely used SCR denitration catalysts in industry are vanadium-titanium catalysts, such catalysts are based on TiO 2 as the carrier, V 2 o 5 As an active ingr...

Claims

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Application Information

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IPC IPC(8): B01J31/32B01J31/38B01D53/86B01D53/56
CPCB01J31/32B01D53/8628B01D2258/0283B01J31/38
Inventor 徐晓亮王文选华攀龙
Owner 江苏万德环保科技有限公司
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