Adsorbent for separating NO in smoke and application thereof

An adsorbent and flue gas technology, applied in the field of flue gas purification, can solve the problems of adsorption capacity, selectivity, stability, energy consumption and economy. It can solve the problems of complex clusters, etc., and achieve the effects of good thermal stability and regeneration performance, easy industrial production, and simple preparation process.

Inactive Publication Date: 2016-09-21
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic porous materials, such as zeolite and activated carbon, are often used as solid-phase adsorbents. The adsorption capacity of these adsorbents is relatively high. However, the surface groups of these materials are complex and easy to react with nitrogen oxides, and the adsorbed nitrogen oxides occur. Chemical changes are not easy to desorb
Some metal oxide materials can also adsorb nitrogen oxides, but the adsorption capacity is relatively small, and the selectivity and stability are not yet clear.
If the above materials are used as NO x Adsorbents are insufficient in terms of adsorption capacity, selectivity, stability, energy consumption and economy, and complex chemical groups on the surface.

Method used

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  • Adsorbent for separating NO in smoke and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, the adsorbent of this example is made by the following method, the amount of other substances is calculated according to the amount of 1 mmol of formic acid used, 1 mmol of formic acid and 12 mmol of acrylamide are placed in the reactor, and 10 ml of acetonitrile is added, Sonicate for 12 minutes, and let the formic acid and acrylamide fully act for 1 hour; then add 25mmol of trimethylolpropane trimethacrylic ester and 0.35mmol of azobisisobutyronitrile, and ultrasonically degas for 10 minutes , filled with nitrogen at a flow rate of 100ml / min for 15 minutes, and sealed the reactor after the nitrogen replaced all the air. The reactor was placed at room temperature under UV light to initiate polymerization for 24 hours. The polymerization reaction product was ground and passed through a 100-mesh sieve, then placed in a Soxhlet extractor, and washed repeatedly for 24 hours with 150ml of a mixture of methanol with a volume ratio of 5:1 and 20% hydrochloric acid ...

Embodiment 2

[0022] Example 2, the adsorbent of this example is made by the following method, the consumption of other substances is calculated according to the consumption of 1 mmol of acetic acid, 1 mmol of acetic acid and 8 mmol of acrylamide are placed in the reactor, and 16 ml of acetonitrile, After 4ml of toluene, sonicate for 15 minutes, and let it stand for 1.2 hours to make the acetic acid and acrylamide fully act; then add 18mmol of divinylbenzene and 0.35mmol of azobisisobutyronitrile, and after ultrasonic degassing for 8 minutes, The flow rate of 120ml / min was filled with nitrogen for 13 minutes, and the nitrogen replaced all the air to seal the reactor. The reactor was placed in a constant temperature water bath at 55°C, and the polymerization reaction was initiated for 36 hours. The polymerization reaction product was ground and placed in a Soxhlet extractor after passing through a 100 mesh sieve, and washed repeatedly for 30 hours with a mixture of 8:1 methanol and 20% hydro...

Embodiment 3

[0023]Example 3, the adsorbent of this example is made by the following method, and the dosage of other substances is calculated according to the dosage of 1 mmol of oxalic acid, 1 mmol of oxalic acid and 10 mmol of acrylamide are placed in the reactor, and After 15ml of acetonitrile, sonicate for 11 minutes, and let stand for 1 hour to make oxalic acid and acrylamide fully act; then add 20mmol of divinylbenzene and 0.4mmol of azobisisoheptanonitrile, and ultrasonically degas for 8 minutes Afterwards, nitrogen gas was charged at a flow rate of 140 ml / min for 11 minutes, and the reactor was sealed after the nitrogen gas completely replaced the air. The reactor was placed in a constant temperature water bath at 60°C, and the polymerization reaction was initiated for 48 hours. The product is ground and placed in a Soxhlet extractor after being crossed through a 100 mesh sieve, and washed repeatedly for 28 hours with a mixture of methanol and 20% hydrochloric acid at a volume rati...

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Abstract

The invention discloses an adsorbent for separating NO in smoke. The adsorbent is prepared from, by mass, 1 part of template molecule, 2-20 parts of functional monomer and 10-25 parts of crosslinking agent wherein the temperate molecule is one of formic acid, acetic acid and oxalic acid, the functional monomer is one or more of acrylic acid, methylacrylic acid, acrylamide and 2,6-pyridinediamine, and the crosslinking agent is one or more of ethylene glycol dimethacrylate, N,N'-methylenediacrylamide and divinyl benzene. The adsorbent is prepared with the molecular imprinting technique, and has the advantages of being large in adsorption capacity and high in selectivity when being used for adsorbing NO in smoke; in addition, the adsorbent is low in recycling energy consumption and suitable for separating NO in smoke through a fixed-bed variable-temperature adsorption / desorption NO separation device.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to an adsorbent for separating NO in flue gas and its application. Background technique [0002] NO emissions from coal-fired power plants x Among them, NO accounts for more than 90%. NO is a colorless, inert gas with no pungent odor. Using a reducing agent to reduce nitrogen oxides to harmless nitrogen and discharge it into the atmosphere is the main research direction of current denitrification technology, among which NH 3 - Selective catalytic reduction (NH 3 -SCR) method is the most mature denitrification method used in coal-fired power plants. However NH 3 -The main problems in the practical application of SCR are the high temperature required for the catalytic reaction, other components in the coal-fired flue gas will poison the catalyst, the cost of the transition metal catalyst is high, and the waste catalyst is toxic and will cause environmental damage Secondary p...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/26B01D53/02
CPCB01J20/268B01D53/02B01D2257/404B01D2258/0283
Inventor 赵毅王涵
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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