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Copper oxide loaded attapulgite catalyst and preparation method and applications thereof

The technology of attapulgite and catalyst is applied in the field of attapulgite-supported copper oxide catalyst, which can solve the problems of high carrier cost and high desulfurization activity temperature, and achieve the effects of high mechanical strength, low operating cost and increased added value.

Inactive Publication Date: 2012-06-20
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These catalysts have high desulfurization activity, but their industrial application is limited due to carrier cost and high desulfurization activity temperature (>300°C).

Method used

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  • Copper oxide loaded attapulgite catalyst and preparation method and applications thereof
  • Copper oxide loaded attapulgite catalyst and preparation method and applications thereof
  • Copper oxide loaded attapulgite catalyst and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: CuO2 / PG

[0034] The preparation of catalyst carrier in the present embodiment:

[0035] Mix 30g of 200-mesh attapulgite powder with 200mL of distilled water, stir to form a suspension, and then dry at 105°C for 12 hours to obtain attapulgite samples; crush and sieve the attapulgite samples to obtain a preparation with a particle size of 20-40 mesh. Supplies: put the spares into a fixed-bed reactor, and heat-treat at 300°C for 2 hours under the atmosphere of nitrogen gas to obtain the catalyst carrier.

[0036] The preparation of catalyst in the present embodiment:

[0037] Take 1g of catalyst carrier, after adding water by equal-volume impregnation method, measure its solid-liquid ratio as 1g: 1.5mL; take Cu(NO 3 ) 2 Solution 1.4mL, containing Cu(NO 3 ) 2 0.97g, dilute to 30mL with distilled water, add evenly to 20g catalyst carrier, let it stand at room temperature for 48 hours, then dry at 70°C for 5h, 110°C for 12 hours, and finally place it in an ai...

Embodiment 2

[0040] Example 2: CuO5 / PG

[0041] The preparation method of the catalyst carrier in this example is the same as that in Example 1.

[0042] The preparation of catalyst in the present embodiment:

[0043] Take 1g of catalyst carrier, after adding water by equal-volume impregnation method, measure its solid-liquid ratio as 1g: 1.5mL; take Cu(NO 3 ) 2 Solution 3.5mL, which contains Cu(NO 3 ) 22.4g, dilute to 30mL with distilled water, add evenly to 20g catalyst carrier, let it stand at room temperature for 48 hours, then dry at 70°C for 5h, 110°C for 12 hours, and finally place it in an air atmosphere and calcinate at 300°C for 3h to obtain Finished CuO5 / PG catalyst.

[0044] Put 3 g of the CuO5 / PG catalyst prepared in this example into a fixed-bed reactor, raise the temperature to 300° C. under a nitrogen atmosphere, pretreat at 300° C. for 1 hour, then lower the temperature to 200° C. Flue gas, simulated flue gas composition is 4380mg / m 3 SO 2 , O 2 4vol%, nitrogen is...

Embodiment 3

[0046] Example 3: CuO12 / PG

[0047] The preparation method of the catalyst carrier in this example is the same as that in Example 1.

[0048] The preparation of catalyst in the present embodiment:

[0049] Take 1g of catalyst carrier, after adding water by equal-volume impregnation method, measure its solid-liquid ratio as 1g: 1.5mL; take Cu(NO 3 ) 2 Solution 8.4mL, which contains Cu(NO 3 ) 2 5.8g, dilute to 30mL with distilled water, add evenly to 20g catalyst carrier, let it stand at room temperature for 48 hours, then dry at 70°C for 5h, 110°C for 12 hours, and finally place it in an air atmosphere and calcinate at 300°C for 3h to obtain CuO12 / PG catalyst finished product.

[0050] Put 3 g of the CuO12 / PG catalyst prepared in this example into a fixed-bed reactor, raise the temperature to 300° C. under a nitrogen atmosphere, pretreat at 300° C. for 1 hour, then lower the temperature to 200° C. Flue gas, simulated flue gas composition is 4380mg / m 3 SO 2 , O 2 4vol%,...

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Abstract

The invention discloses a copper oxide loaded attapulgite catalyst and a preparation method and applications thereof. The copper oxide loaded attapulgite catalyst is a composite which uses the calcined attapulgite as the catalyst carrier and is loaded with copper oxide; and the weight of copper oxide accounts for 2-20% of the weight of the catalyst carrier. The preparation method of the catalyst comprises the following steps: adopting the isovolumetric impregnation method to load a catalyst precursor on the surface of the catalyst carrier, drying and calcining to obtain the copper oxide loaded attapulgite catalyst, wherein the catalyst precursor is Cu(NO3)2. The catalyst disclosed by the invention is used to remove SO2 in the flue gas. The cheap and available attapulgite is used as the catalyst carrier, thus reducing the cost of the catalyst and the environmental load; and attapulgite has better formability and thermal stability, and the catalyst which is loaded with the copper active component has higher sulfur capacity.

Description

1. Technical field [0001] The invention relates to an attapulgite supported copper oxide catalyst, a preparation method and application thereof. 2. Background technology [0002] Environmental pollution is one of the major problems facing mankind today. SO in coal-fired flue gas 2 The pollution of the environment is particularly prominent due to the emission of acid rain, and it is the main factor that constitutes acid rain, so it is imperative to significantly reduce its emission. my country is a large coal-producing and coal-consuming country, and high-sulfur coal is widely distributed. It is estimated that by 2020, coal production will reach 3 billion tons. It is estimated that the environmental capacity for the concentration of sulfur dioxide in my country's atmosphere to meet the national quality secondary standard is 1,200 tons, while the SO2 emitted by coal combustion 2 More than 20 million tons for many consecutive years, resulting in acid rain and SO 2 Pollution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01D53/86B01D53/50
Inventor 张先龙姜伟平吴雪平时博文杨保俊张翠平贾小彬
Owner HEFEI UNIV OF TECH
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