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Honeycomb type low-temperature denitrification catalyst and preparation method thereof

A low-temperature denitration and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of unsatisfactory catalytic activity, insufficient service life, and decreased catalyst activity, so as to improve the anti-SO2 ability. , reduce the dosage, the effect of uniform distribution

Inactive Publication Date: 2019-06-28
青岛瑞克尔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of these catalysts involves the mixing of various oxides. The difference in mixing methods and preparation processes leads to uneven distribution of catalyst active components, so the catalytic activity is not ideal. Some powder catalysts have NOx conversion rates up to More than 90%, while the activity of the catalyst after molding will decline to a certain extent, and the catalyst is prone to poisoning for unknown reasons, resulting in a short service life, and no out-of-stock catalyst suitable for industrial scale-up production has been developed.

Method used

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  • Honeycomb type low-temperature denitrification catalyst and preparation method thereof
  • Honeycomb type low-temperature denitrification catalyst and preparation method thereof
  • Honeycomb type low-temperature denitrification catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A method for preparing a honeycomb low-temperature denitration catalyst, comprising the steps of:

[0035] 1) Treatment of carbon nanotubes: Weigh 100g of single-walled carbon nanotubes with a diameter of 20-40nm and a length of 1-2μm purchased by Shenzhen Nanoport Co., Ltd., add 500ml of 3mol / L permanganate to it, and heat to 120°C Under reflux for 8 hours, cooled to room temperature, centrifuged, washed with clear water until neutral, to obtain acidified carbon nanotubes; adding 50 g of acidified carbon nanotubes to 500 ml of sodium lignosulfonate aqueous solution with a concentration of 10 g / L, first Place it in a 20Hz sonicator for 1 hour, and then place it in a 50°C water bath for 10 hours under stirring conditions. After the reaction, centrifuge to remove unreacted sodium lignosulfonate, and obtain carbon nanotubes with negative charges on the surface;

[0036] 2) Preparation of LDHs: Using manganese nitrate, copper nitrate and aluminum nitrate as raw materials, a...

Embodiment 2

[0041] A method for preparing a honeycomb low-temperature denitration catalyst, comprising the steps of:

[0042] 1) Treatment of carbon nanotubes: Weigh 100g of multi-walled carbon nanotubes with a diameter of 20-40nm and a length of 1-2μm purchased by Shenzhen Nanoport Co., Ltd., add 500ml of 3mol / L nitric acid to it, and heat to 130°C for reflux After 5 hours, cool down to room temperature, centrifuge, wash with water until neutral to obtain acidified carbon nanotubes; weigh 50 g of acidified carbon nanotubes and add to 500 ml of polystyrene sodium sulfonate (PSS for short) with a concentration of 6 g / L In the aqueous solution, first place it in a 20Hz sonicator for 2 hours, and then place it in a water bath at 60°C under stirring conditions for 7 hours. After the reaction, centrifuge to remove unreacted PSS, and obtain carbon nanotubes with negative charges on the surface;

[0043] 2) Preparation of LDHs: Using water-soluble manganese chloride, copper chloride and aluminum...

Embodiment 3

[0048] A method for preparing a honeycomb low-temperature denitration catalyst, comprising the steps of:

[0049] 1) Treatment of carbon nanotubes: Weigh 100g of multi-walled carbon nanotubes with a diameter of 20-40nm and a length of 1-2μm purchased by Shenzhen Nanoport Co., Ltd., add 500ml of 5mol / L sulfuric acid to it, heat to 140°C and reflux After 3 hours, cool down to room temperature, centrifuge, wash with water until neutral to obtain acidified carbon nanotubes; weigh 50 g of the obtained acidified carbon nanotubes and add to 500 ml of sodium dodecylbenzenesulfonate with a concentration of 1 g / L In the aqueous solution, first place it in a 20Hz sonicator for 1 hour, and then place it in a 70°C water bath for 4 hours under stirring conditions. After the reaction, centrifuge to remove unreacted sodium dodecylbenzenesulfonate, and obtain negatively charged carbon nanotubes;

[0050] 2) Preparation of LDHs: Using manganese sulfate, copper sulfate and aluminum sulfate as r...

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Abstract

The invention discloses a honeycomb type low-temperature denitrification catalyst and a preparation method thereof. Through carbon nanotube obtained by an ion exchange method and hydrotalcite intercalated with metavanadate, Mn and Cu atoms on a laminated plate are distributed regularly and uniformly, and the active components of the catalyst are uniformly distributed and closely combined with a carrier. Under the influence of the dual electronic effect of the 'carrier' and the laminated plate, the catalyst has a catalytic effect that an ordinary supported catalyst cannot achieve.

Description

technical field [0001] The invention relates to a denitration catalyst, in particular to a honeycomb low-temperature denitration catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique [0002] Nitrogen oxides (NO X ) is one of the main pollutants in the atmospheric environment and the main substance that forms acid rain and photochemical smog, which has brought serious harm to the ecological environment and human life on a global scale. Among them, the nitrogen oxides (NOx) emitted from the flue gas of thermal power plants X ) accounted for the vast majority. [0003] For flue gas denitrification technology, selective catalytic reduction (selective catalytic reduction, SCR) method has been widely used because of its low reaction temperature, high purification efficiency, reliable operation and low secondary pollution. The catalyst is the core of the SCR flue gas denitrification system, and its performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/56B01D53/86
Inventor 薛冰叶现军陈泽秋
Owner 青岛瑞克尔新材料科技有限公司
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