Nitrogen oxide absorbent

A nitrogen oxide and adsorbent technology, applied in the direction of alkali metal oxide/hydroxide, alkali metal compound, inorganic chemistry, etc., can solve the problem of low feasibility, low nitrogen oxide purification efficiency, investment, operation and maintenance The problem of high cost can achieve the effect of good treatment effect, ideal effect and convenient industrial production.

Inactive Publication Date: 2017-05-31
ZHENGZHOU BEIDOU COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the treatment method of industrial furnaces and kilns for nitrogen oxides is mainly based on selective catalytic reduction. This method has high investment, operation and maintenance costs, and is suitable for the treatment of nitrogen oxides in furnace flue gas with large volume and continuous emission.
For the treatment of intermittent and high-concentration nitrogen oxides, the feasibility of using this method is not high, and the dry adsorption process with small investment, stable operation, and low maintenance and operation costs shows its advantages
In the prior art, nano attapulgite is compounded with other raw materials with the same effect. Although the pure nano attapulgite adsorption and other physical adsorption methods have very low purification efficiency for nitrogen oxides

Method used

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  • Nitrogen oxide absorbent

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Effect test

Embodiment 1

[0016] In the embodiment of the present invention, a nitrogen oxide adsorbent is composed of the following raw materials in parts by weight: 26 parts of nano-attapulgite, 9 parts of catechin, 5 parts of malondialdehyde, and 1 part of triethanolamine.

[0017] Mix malondialdehyde with 3.2 times the mass of ethanol to prepare a malondialdehyde solution; mix catechin with 8.3 times its mass in deionized water to prepare a catechin solution. Mix and grind nano-attapulgite and triethanolamine, add catechin solution, heat to 88°C and seal and stir at this temperature for 86 minutes, then add malondialdehyde solution, cool to 66°C and stir at this temperature for 52 minutes , and then lowered to 60°C and ultrasonically treated at this temperature for 33min with an ultrasonic power of 1000W, then stirred at a temperature of 98°C until dry, and then calcined in a muffle furnace at 430°C for 3.2h to obtain the adsorbent.

Embodiment 2

[0019] In the embodiment of the present invention, a nitrogen oxide adsorbent is composed of the following raw materials in parts by weight: 34 parts of nano-attapulgite, 17 parts of catechin, 13 parts of malondialdehyde, and 5 parts of triethanolamine.

[0020] Mix malondialdehyde with 3.2 times the mass of ethanol to prepare a malondialdehyde solution; mix catechin with 8.3 times its mass in deionized water to prepare a catechin solution. Mix and grind nano-attapulgite and triethanolamine, add catechin solution, heat to 88°C and seal and stir at this temperature for 86 minutes, then add malondialdehyde solution, cool to 66°C and stir at this temperature for 52 minutes , and then lowered to 60°C and ultrasonically treated at this temperature for 33min with an ultrasonic power of 1000W, then stirred at a temperature of 100°C until dry, and then calcined in a muffle furnace at 430°C for 3.2h to obtain the adsorbent.

Embodiment 3

[0022] In the embodiment of the present invention, a nitrogen oxide adsorbent is composed of the following raw materials in parts by weight: 28 parts of nano-attapulgite, 11 parts of catechin, 7 parts of malondialdehyde, and 2 parts of triethanolamine.

[0023] Mix malondialdehyde with 3.2 times the mass of ethanol to prepare a malondialdehyde solution; mix catechin with 8.3 times its mass in deionized water to prepare a catechin solution. Mix and grind nano-attapulgite and triethanolamine, add catechin solution, heat to 88°C and seal and stir at this temperature for 86 minutes, then add malondialdehyde solution, cool to 66°C and stir at this temperature for 52 minutes , and then lowered to 60°C and ultrasonically treated at this temperature for 33min with an ultrasonic power of 1000W, then stirred at a temperature of 99°C until dry, and then calcined in a muffle furnace at 430°C for 3.2h to obtain the adsorbent.

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Abstract

The invention discloses nitrogen oxide absorbent. The nitrogen oxide absorbent comprises, by weight, 26-34 parts of nano attapulgite, 9-17 parts of catechin, 5-13 parts of malonaldehyde and 1-5 parts of triethanolamine. The nitrogen oxide absorbent has the advantages that the nitrogen oxide absorbent prepared by mixing and grinding the nano attapulgite and the triethanolamine, processing with the catechin and the malonaldehyde and performing ultrasonic treatment is high in mechanical strength, the service life of the absorbent is prolonged, and the replacing frequency of the absorbent is lowered; the absorbent is high in treatment efficiency on high-concentration nitrogen oxide, fast in purification, good in treatment effect, large in absorption capacity, long in replacement cycle, and the like; the nitrogen oxide absorbent nonhazardous and non-corrosive to human, stable in performance and simple to operate, does not need special equipment and cannot cause secondary pollution during treatment; a preparation process of the nitrogen oxide absorbent is simple, easy to operate, low in cost, efficient, environmentally friendly and convenient for industrial production.

Description

technical field [0001] The invention relates to the technical field of adsorbents, in particular to a nitrogen oxide adsorbent. Background technique [0002] There are many types of nitrogen oxides (nitrogen oxides), common ones include nitrous oxide (N 2 O), nitric oxide (NO), nitrogen dioxide (NO 2 ), nitrogen trioxide (N 2 o 3 ), dinitrogen tetroxide (N 2 o 4 ) and dinitrogen pentoxide (N 2 o 5 ), and nitric oxide dimer (N 2 o 2 ), nitrosyl azide (N 4 O), nitrogen trioxide (NO 3 ), but mostly NO and NO 2 , which are common air pollutants. At present, the treatment method for nitrogen oxides in industrial furnaces is mainly based on selective catalytic reduction. This method has high investment, operation and maintenance costs, and is suitable for the treatment of nitrogen oxides in furnace flue gas with large volume and continuous emission. For the treatment of intermittent and high-concentration nitrogen oxides, the feasibility of using this method is not hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02
CPCB01J20/165B01D53/02B01D2257/40B01D2258/02B01J20/22B01J20/28007
Inventor 不公告发明人
Owner ZHENGZHOU BEIDOU COMM TECH
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