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Application of ionic liquid composite metal framework material to NO capture

A metal frame material and ionic liquid technology, applied in the fields of new materials, resources and the environment, can solve the problems of few applications and difficult implementation, and achieve the effects of simple operation process, improved absorption effect, and convenient preparation

Pending Publication Date: 2021-09-24
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires less investment in equipment and lower operating costs, but because the absorbent itself is an aqueous solution, it is difficult to implement in many places with high humidity requirements or places with harsh working conditions
[0005] The metal frame material of single metal Cr has been applied in gas separation, and the basic ionic liquid has also been used in gas adsorption, but it is basically only used in CO 2 , CO, NH 3 Absorption and separation of other gases, but less application in NO gas absorption

Method used

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  • Application of ionic liquid composite metal framework material to NO capture
  • Application of ionic liquid composite metal framework material to NO capture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of MIL-101-Cr: CrCl 3 ·6H 2 O (2.66 g, 0.01 mol), terephthalic acid (1.66 g, 0.01 mol), 1-butyl-3-methylimidazole hydrochloride (0.1 g) and 80 mL of high-purity water were added to 100 mL of The sealed reactor was placed in a 200 °C oven for 10 h in a polytetrafluoroethylene liner. After the solution was naturally cooled to room temperature, it was washed with high-purity water and absolute ethanol three times, and finally vacuum-dried at 100 °C. After drying in the oven for 2 h, 3.0 g of a light green powder sample was obtained, which was named MIL-101-Cr.

[0021] Preparation of IL-MIL-101-Cr: Add 1.0 g of MIL-101-Cr obtained in the previous step, 1.0 g of tetraethylenepentamine, and 30 g of toluene to the reactor in sequence, and stir for 2 h at normal temperature and pressure Afterwards, the temperature was programmed at a rate of 1 °C / min, and the temperature was raised to a constant temperature of 80 °C and continued to stir for 8 h, then naturally c...

Embodiment 2

[0023] Preparation of IL-MIL-101-Cr: Add 1.0 g of MIL-101-Cr obtained in Example 1, 1.0 g of triethylenetetramine, and 25 g of toluene to the reaction kettle in sequence, and stir for 2 h at normal temperature and pressure. Carry out the temperature program, the heating rate is 1 ℃ / min, the temperature is raised to 80 ℃ and the constant temperature is continued to stir for 8 h, and then it is naturally cooled to room temperature under the condition of stirring, and the equimolar amount of guaiacol and triethylenetetramine is added, and then the program is controlled. Heat up at a rate of 0.5 °C / min, slowly increase the temperature to 80 °C, continue to stir at a constant temperature for 15 h, then stop stirring and naturally cool to room temperature overnight. Vacuum drying at 60 °C for 2 h yielded 1.35 g of off-white composite material IL-MIL-101-Cr. Therefore, it can be calculated that the loading of ionic liquid IL is 35% of the mass of MIL-101-Cr as the metal frame material...

Embodiment 3

[0025] Preparation of IL-MIL-101-Cr: 1.0 g of MIL-101-Cr obtained in Example 1, 0.5 g of tetraethylenepentamine, 0.5 g of triethylenetetramine, and 30 g of toluene were added to the reaction kettle in sequence, and the After stirring for 2 h under normal pressure, the temperature was programmed at a rate of 1 °C / min. The temperature was raised to a constant temperature of 80 °C and continued to stir for 8 h. Then, it was naturally cooled to room temperature under stirring conditions, and guaiac wood and polyamine were added. phenol, then proceed to program-controlled temperature rise at a rate of 0.5 °C / min, slowly increase the temperature to 80 °C, continue to stir at a constant temperature for 15 h, then stop stirring and naturally cool to room temperature overnight. Water was washed three times respectively, and vacuum-dried at 60 °C for 2 h to obtain 1.43 g off-white composite material IL-MIL-101-Cr, so it can be calculated that the loading capacity of ionic liquid IL is MI...

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Abstract

The invention discloses application of an ionic liquid composite metal framework material to NO capture. The composite material IL-MIL-101-Cr obtained by combining an ionic liquid IL and a metal frame material MIL-101-Cr is used for capturing NO. Compared with the prior art, the method has the advantages that (1) raw materials are easy to obtain, the operation process is simple, and the requirement on equipment is not high; (2) compared with other publicly reported NO gas adsorption materials, the prepared IL-MIL-101-Cr composite material has a remarkable progress in effect, and can be applied to the fields of aerospace, aviation, navigation, deep sea operation and the like; (3) the composite material is convenient to recycle, can be repeatedly used, is environment-friendly and is easy to industrially amplify.

Description

technical field [0001] The invention relates to a composite material based on a metal frame material of single metal Cr and an ionic liquid, and an application method for capturing and absorbing NO gas under natural temperature conditions, belonging to the fields of resources and environment and new materials. Background technique [0002] Nitric oxide (NO) is a colorless, odorless gas that is insoluble in water. Because NO has free radicals, its chemical properties are very active. When it reacts with oxygen, it can form corrosive Gas - Nitrogen Dioxide (NO 2 ), NO 2 It can react with water to form nitric acid to form acid mist and acid rain; NO has strong oxidizing properties, and it is easy to catch fire when it comes into contact with flammables and organic matter, and it will emit brown-yellow mist with acidic oxidizing properties when it comes into contact with air; in addition, NO, NO 2 Nitrogen oxides (NOx) contained in nitrogen can cause damage to the respiratory ...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/02
CPCB01D53/1456B01D53/1493B01D53/02B01D2252/30B01D2253/204B01D2257/404
Inventor 郑文涛巫先坤孙世新徐国栋方东
Owner YANCHENG TEACHERS UNIV
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