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Preparation method of iron or copper oxide pillared layered manganese oxide low-temperature denitration catalyst

A layered manganese oxide and low-temperature denitrification technology, applied in the field of denitrification catalysts, can solve the problems of poor thermal stability, limitation, and small specific surface area, and achieve high sulfur resistance, good low-temperature denitrification activity, and large specific surface area.

Active Publication Date: 2018-05-25
海南中盛旭鑫低碳科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its poor thermal stability and small specific surface area, the application of layered manganese oxide in many fields such as adsorbents and catalysts is limited.

Method used

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  • Preparation method of iron or copper oxide pillared layered manganese oxide low-temperature denitration catalyst
  • Preparation method of iron or copper oxide pillared layered manganese oxide low-temperature denitration catalyst
  • Preparation method of iron or copper oxide pillared layered manganese oxide low-temperature denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Preparation of hydroxide:

[0055] Dissolve manganese acetate and ferric nitrate in deionized water to prepare a mixed aqueous solution of manganese and iron, and then add 1 part of the mixed aqueous solution of manganese and iron dropwise to 1 part of aqueous potassium hydroxide in parts by volume. With stirring, an aqueous solution of mixed hydroxides of manganese and iron was obtained; wherein, 1.43 g of ferric nitrate, 4.92 g of manganese acetate, and 30 ml of deionized water. The potassium hydroxide molar concentration of potassium hydroxide aqueous solution is 8mol / L, and the rate of addition is 2ml / min;

[0056] (2) Oxidation of hydroxide:

[0057] In parts by volume, add 1.7 parts of 10g / L potassium permanganate aqueous solution dropwise at a rate of 2ml / min to 1 part of manganese and iron mixed hydroxide aqueous solution obtained in step (1), at 40°C under stirring conditions Oxidation reaction 72h;

[0058] (3) Suction filtration and washing:

[0059] ...

Embodiment 2

[0065] The steps and conditions of the preparation method of this embodiment are basically the same as those of Example 1, except that the ferric nitrate is 0.9 g, the manganese acetate is 4.92 g, and the deionized water is 30 ml. Finally, the iron oxide pillared layered manganese oxide low-temperature denitrification catalyst is obtained, which is denoted as Fe 0.1 mn 0.9 (IN)-300.

Embodiment 3

[0067] The steps and conditions of the preparation method of this embodiment are basically the same as those of Example 1, except that the ferric nitrate is 0.43 g, the manganese acetate is 4.92 g, and the deionized water is 30 ml. Finally, the iron oxide pillared layered manganese oxide low-temperature denitrification catalyst is obtained, which is denoted as Fe 0.05 mn 0.95 (IN)-300.

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Abstract

The invention provides a preparation method of an iron or copper oxide pillared layered manganese oxide low-temperature denitration catalyst. The method mainly uses a shared precursor method. Throughhydroxide preparation, hydroxide oxidization, suction filtration and washing, drying and roasting preparation, the iron or copper oxide pillared layered manganese oxide low-temperature denitration catalyst is obtained. The low-temperature denitration catalyst has the advantages that the active temperature window is low; the denitration efficiency is high; the method is applicable to the SCR (selective catalytic reduction) method low-temperature denitration technology.

Description

technical field [0001] The invention belongs to the technical field of denitrification catalysts, and relates to a preparation method of iron or copper oxide pillared layered manganese oxide low temperature denitrification catalyst, especially iron or copper oxide pillared layered oxidation for coke oven flue gas SCR low temperature denitrification technology A preparation method of a manganese low-temperature denitrification catalyst. Background technique [0002] With the increasing demands of modern environmental protection and people's awareness of environmental protection, the coking industry is beginning to face more and more pressure and rigid constraints of environmental protection standards. The combustion of gas in the coking production process will generate many pollutants harmful to the environment and human health, nitrogen oxides (NO X ) is one of them. Since coking enterprises are NO X One of the main sources of emissions, the new "Coking Chemical Industry ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/10B01J35/02B01D53/86B01D53/56B01J35/00
CPCB01D53/8628B01J23/002B01J23/8892B01D2258/0283B01J35/60B01J35/61
Inventor 李建军刘安琪刘勇军郭家秀李盼宋
Owner 海南中盛旭鑫低碳科技有限公司
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