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Cu-Fe composite catalyst sulfonated by H2SO4 and application thereof

A catalyst and catalyst carrier technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems affecting ecological environment and life and health, achieve low cost, promote denitration efficiency, and broaden activity The effect of window temperature

Inactive Publication Date: 2019-10-15
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

NO x It will cause environmental problems such as acid rain and photochemical smog, seriously affecting the ecological environment and life and health

Method used

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  • Cu-Fe composite catalyst sulfonated by H2SO4 and application thereof
  • Cu-Fe composite catalyst sulfonated by H2SO4 and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Cu 3 -Fe 1 / Sn 0.33 Ti 0.67 o 2 Catalyst preparation.

[0012] 5.855g of SnCl 4 ·5H 2 O and 8.016g of Ti(SO 4 ) 2 Dissolve in 250mL of hydrochloric acid solution (0.1mol / L), record the above mixed solution as solution A, use 15.5wt.% ammonia water as precipitant, add solution A and ammonia water drop by drop under vigorous stirring until the pH is 8 In the phosphate buffer solution, control the drop rate of solution A to be less than 3mL / min, and maintain the pH at around 9. The suspension after the reaction was centrifuged and washed with deionized water and ethanol until it was washed with Ag(NO 3 ) 3 No white precipitate was detected. The resulting solid was dried at 100°C, calcined at 400°C, and ground to obtain Sn 0.33 Ti 0.67 o 2 Composite oxide powder. 3.986g of Cu(NO 3 ) 2 ·3H 2 O and 4.444g of Fe(NO 3 ) 3 9H 2 O was dissolved in 30 mL of deionized water, and 1 g of Sn was added to the above mixed solution 0.33 Ti 0.67 o 2 Comp...

Embodiment 2

[0013] Example 2: Cu 3 -Fe 1 / 0.2SO 4 2- -Sn 0.33 Ti 0.67 o 2 Catalyst preparation.

[0014] With the Sn prepared in embodiment 1 0.33 Ti 0.67 o 2 Composite oxides, impregnated with 0.2mol / L sulfuric acid, control 1.0g Sn 0.33 Ti 0.67 o 2 Composite oxide / 1.5mL impregnating solution, stand at room temperature for 12h, dry at 100°C for 1h, and finally roast at 300°C for 2h, and grind to obtain sulfonated 0.2SO 4 2- -Sn 0.33 Ti 0.67 o 2 Catalyst carrier. 3.986g of Cu(NO 3 ) 2 ·3H 2 O and 4.444g of Fe(NO 3 ) 3 9H 2 O was dissolved in 30 mL of deionized water, and 1 g of 0.2 SO was added to the above mixed solution 4 2- -Sn 0.33 Ti 0.67 o 2 Carrier, the total weight of the active component is controlled to be 10% of the carrier (with CuO, Fe 2 o 3 (meter), sonicated for 1h, dried at 100°C, then heated to 400°C at 3°C / min for calcination, kept for 2h, and ground to obtain Cu 3 -Fe 1 / 0.2SO 4 2- -Sn 0.33 Ti 0.67 o 2 catalyst.

Embodiment 3

[0015] Example 3: Cu 3 -Fe 1 / 0.4SO 4 2- -Sn 0.33 Ti 0.67 o 2 Catalyst preparation.

[0016] With the Sn prepared in embodiment 1 0.33 Ti 0.67 o 2 Composite oxides, impregnated with 0.4mol / L sulfuric acid, control 1.0g Sn 0.33 Ti 0.67 o 2 Composite oxide / 1.5mL impregnating solution, stand at room temperature for 12h, dry at 100°C for 1h, and finally roast at 300°C for 2h, and grind to obtain sulfonated 0.4SO 4 2- -Sn 0.33 Ti 0.67 o 2 Catalyst carrier. 3.986g of Cu(NO 3 ) 2 ·3H 2 O and 4.444g of Fe(NO 3 ) 39H 2 O was dissolved in 30 mL of deionized water, and 1 g of 0.4SO was added to the above mixed solution 4 2- -Sn 0.33 Ti 0.67 o 2 Carrier, the total weight of the active component is controlled to be 10% of the carrier (with CuO, Fe 2 o 3 (meter), sonicated for 1h, dried at 100°C, then heated to 400°C at 3°C / min for calcination, kept for 2h, and ground to obtain Cu 3 -Fe 1 / 0.4SO 4 2- -Sn 0.33 Ti 0.67 o 2 catalyst.

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Abstract

The invention discloses a Cu-Fe composite catalyst sulfonated by H2SO4 and application thereof. The method comprises the following steps: preparing a ySO4<2->-Sn0.33Ti0.67O2 supporter with different sulfuric acid sulfonation concentrations by adopting an impregnation method, supporting Cu3-Fe1 on the supporter, and finally roasting the supporter to obtain the composite catalyst. The invention alsoresearches the influence of the obtained catalyst on the conversion rate of NOx and the anti-sulfur activity. The result shows that the Cu3-Fe1 / 0.6SO4<2->-Sn0.33Ti0.67O2 catalyst shows the optimal denitration activity and the better sulfur resistance. The conversion rate of NOx of the Cu3-Fe1 / 0.6SO4<2->-Sn0.33Ti0.67O2 catalyst at 300 DEG C is as high as 93.2%, so that the active window temperature of the catalyst is widened.

Description

technical field [0001] The invention relates to the technical field of low-temperature flue gas denitrification, in particular to a sulfuric acid sulfonated carrier Sn 0.33 Ti 0.67 o 2 It also supports Cu-Fe bimetallic low-temperature denitrification catalyst and its application in the direction of ammonia selective catalytic reduction of nitrogen oxides. Background technique [0002] NO x It is one of the main air pollutants, which mainly comes from coal mine combustion, industrial waste gas and vehicle exhaust emissions. NO x It will cause environmental problems such as acid rain and photochemical smog, which will seriously affect the ecological environment and life and health. How to scientifically and effectively reduce NO x It has become an important research direction in the field of environmental protection. Currently NH 3 -SCR is to remove NO x the most effective way. Cu has a strong redox ability, and Fe has a good ability to resist sulfur dioxide. The res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/055B01D53/86B01D53/56
CPCB01D53/8628B01D2251/2062B01J27/055
Inventor 田蒙奎张婷孙琦张云飞范丽
Owner GUIZHOU UNIV