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Flue gas desulfurization and denitrification adsorbent as well as preparation and usage method thereof

A desulfurization, denitrification, and adsorbent technology, applied in the field of flue gas purification, can solve the problem of less research on adsorbents, and achieve the effects of no secondary pollution, simple equipment operation, and mild synthesis conditions.

Active Publication Date: 2018-02-23
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of less research on adsorbents for simultaneous desulfurization and denitrification in the prior art, and to provide a flue gas desulfurization and denitrification adsorbent and its preparation and use method

Method used

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  • Flue gas desulfurization and denitrification adsorbent as well as preparation and usage method thereof
  • Flue gas desulfurization and denitrification adsorbent as well as preparation and usage method thereof
  • Flue gas desulfurization and denitrification adsorbent as well as preparation and usage method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Take a three-necked flask, put a condensing reflux tube on it, and install a sealed dropping funnel and a stirring device, put tetrabutylammonium bromide and ethylene glycol into the flask, stir, and control the solution temperature at 20±2°C, mix well Obtain tetrabutylammonium bromide-ethylene glycol deep eutectic solvent, the molar ratio of tetrabutylammonium bromide and ethylene glycol is 1:2.

[0039] Take the adsorbent and put it in the bubbling bed reactor, the temperature of the reactor is controlled at 50±2°C, and SO 2 and NO gas are absorbed, and the residence time of the gas in the adsorbent is 2-6s; the adsorbent with absorption equilibrium is placed in a temperature environment of 100±2°C, and the SO 2 and NO desorption experiments. The adsorption equilibrium is reached in 6 minutes, the sulfur capacity S(g) / adsorbent (g) is 0.25, the nitrogen capacity N(g) / adsorbent (g) is 0.026; the equilibrium desorption capacity reaches 90% in 5 minutes.

Embodiment 2

[0041] Take a three-necked flask, put a condensing reflux tube on it, and install a sealed dropping funnel and a stirring device, put tetrabutylammonium bromide and ethylene glycol into the flask, stir, and control the solution temperature at 20±2°C, mix well Obtain tetrabutylammonium bromide-ethylene glycol deep eutectic solvent, the molar ratio of tetrabutylammonium bromide and ethylene glycol is 1:5.

[0042]Take the adsorbent and put it in the bubbling bed reactor, the temperature of the reactor is controlled at 50±2°C, and SO 2 and NO gas are absorbed, and the residence time of the gas in the adsorbent is 2-6s; the adsorbent with absorption balance is placed in a temperature environment of 90-92°C for SO 2 and NO desorption experiments. The adsorption equilibrium is reached in 9 minutes, the sulfur capacity S(g) / adsorbent (g) is 0.3, the nitrogen capacity N(g) / adsorbent (g) is 0.03; the equilibrium desorption capacity reaches 90% in 10 minutes.

Embodiment 3

[0044] Take a three-necked flask, put a condensing reflux tube on it, and install a sealed dropping funnel and a stirring device, put tetrabutylammonium bromide and ethylene glycol into the flask, stir, and control the solution temperature at 20±2°C, mix well Obtain tetrabutylammonium bromide-ethylene glycol deep eutectic solvent, the molar ratio of tetrabutylammonium bromide and ethylene glycol is 1:10.

[0045] Measure the adsorbent and place it in the bubbling bed reactor, the temperature of the reactor is controlled at 50±2°C, and SO 2 and NO gas are absorbed, and the residence time of the gas in the adsorbent is 2-6s; the adsorbent with absorption equilibrium is placed in a temperature environment of 100±2°C, and the SO 2 and NO desorption experiments. The adsorption equilibrium is reached in 15 minutes, the sulfur capacity S(g) / adsorbent (g) is 0.7, the nitrogen capacity N(g) / adsorbent (g) is 0.05; the equilibrium desorption capacity reaches 90% in 20 minutes.

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Abstract

The invention aims at solving the problem that the research on the desulfurization and denitrification adsorbent in the prior art is less, and provides a flue gas desulfurization and denitrification adsorbent and a preparation and usage method thereof. The adsorbent is a deep eutectic solvent generated by reacting tetrabutyl ammonium bromide with ethylene glycol according to the molar ratio of 1:(2-100); furthermore, the adsorbent is an iron-based deep eutectic solvent generated by adding ferrous chloride into the deep eutectic solvent and reacting, the content of the ferrous chloride in the deep eutectic solvent is 0.1-1mol / L. The adsorbent has adsorption selectivity, can simultaneously adsorb SO2 and Nox in flue gas and the adsorption quantity is large, so that the desulfurization and denitrification cost can be lowered, no secondary pollution exists, and the deep eutectic solvent adsorbent can also realize repeated adsorption-desorption cyclic regeneration.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to an efficient and recyclable flue gas desulfurization and denitrification adsorbent and a preparation and use method thereof. Background technique [0002] my country is a country with primary energy resources dominated by coal. Electricity production is dominated by thermal power generation. Coal-fired power plants emit a large amount of SO through flue gas. 2 , NO x , mercury, particles and other trace elements, are the emission of SO 2 , NO x Major industries such as pollutants. Especially in recent years, with the formation and spread of large-scale smog weather across the country, the air pollution caused by coal burning has attracted great attention from the government and the public. [0003] Fuel desulfurization technology has been used in various stages of fuel combustion process, such as pre-combustion desulfurization, in-combustion desulfur...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01J20/34B01D53/02
CPCB01D53/02B01D2257/302B01D2257/40B01D2258/0283B01J20/22B01J20/3425B01J20/3483
Inventor 余江龙窦金孝李华尹丰魁阿加西·塔玛赛比田露张春霞
Owner UNIV OF SCI & TECH LIAONING
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