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Preparation and modification methods for solid material Zr-CN for adsorbing CO2

A solid material and modification technology, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of small adsorption capacity, high adsorption-desorption temperature, and low energy consumption

Inactive Publication Date: 2015-06-10
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, using hydrotalcite and metal oxides for CO 2 When adsorbed, it has a larger adsorption capacity, but the adsorption-desorption temperature is higher
CO using activated carbon, zeolites, or metal-organic frameworks (MOFs) materials 2 During adsorption, the adsorption-desorption temperature is lower and the energy consumption is lower. However, since the adsorption process is physical adsorption, the adsorption amount is small

Method used

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  • Preparation and modification methods for solid material Zr-CN for adsorbing CO2
  • Preparation and modification methods for solid material Zr-CN for adsorbing CO2

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0024] a. Dissolve 8mmol potassium ferrocyanide in 80ml deionized water to form solution A1;

[0025] b. Add 4 mmol of zirconium oxychloride octahydrate to the A1 solution, and stir at 30° C. for 3 h to obtain the first solid product;

[0026] c. washing the obtained first solid product with deionized water until the solution is neutral;

[0027] d. The washed first solid product was dried at 30° C. for 12 hours, and then dried in a vacuum oven at 80° C. for 6 hours to obtain the solid material Zr-CN.

[0028] According to the obtained solid material Zr-CN of embodiment 1 to CO 2 The curve of the adsorption capacity with time is shown in the appendix figure 1 As shown, it can be seen from the figure that the Zr-CN to CO 2 The adsorption increases with time, and the maximum adsorption capacity is 2.35mmol·g -1 .

preparation example 2

[0030] a. Dissolve 8mmol potassium ferrocyanide in 80ml deionized water to form solution A1;

[0031] b. Add 8 mmol of zirconium oxychloride octahydrate to the A1 solution, and stir at 30°C for 4 hours to obtain the first solid product;

[0032] c. washing the obtained first solid product with deionized water until the solution is neutral;

[0033] d. The washed first solid product was dried at 40° C. for 18 hours, and then dried in a vacuum oven at 80° C. for 7 hours to obtain the solid material Zr-CN.

preparation example 3

[0035] a. Dissolve 8mmol potassium ferrocyanide in 80ml deionized water to form solution A1;

[0036] b. Add 12 mmol of zirconium oxychloride octahydrate to the A1 solution, and stir at 30° C. for 5 h to obtain the first solid product;

[0037] c. washing the obtained first solid product with deionized water until the solution is neutral;

[0038] d. The washed first solid product was dried at 50° C. for 24 hours, and then dried in a vacuum oven at 80° C. for 8 hours to obtain the solid material Zr-CN.

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Abstract

The invention provides a preparation method for a solid material Zr-CN for adsorbing CO2. The preparation method comprises the following steps: dissolving a metal salt A into 80ml of de-ionized water to form a solution A1; adding a metal salt B into the solution A1, and stirring at 30-50 DEG C for 3-5 hours to obtain a first solid product; washing the first solid product with the de-ionized water until the first solid product is neutral; drying the washed first solid product at 30-50 DEG C for 12-24 hours; and putting the product in a vacuum drying box at 80-100 DEG C and drying for 6-8 hours to obtain the solid material Zr-CN. The material has a good adsorption amount to the CO2 under a relatively low temperature and a relatively low CO2 pressure environment.

Description

【Technical field】 [0001] The present invention relates to CO 2 Adsorption materials, specifically related to a kind of high-efficiency adsorption of CO in a lower temperature and lower pressure environment 2 The preparation method of the solid material Zr-CN and its modification. 【Background technique】 [0002] At present, the emission of industrial waste gas has caused atmospheric CO 2 Concentration increases sharply, thereby intensifying the greenhouse effect. Therefore, CO 2 Capture technology has been highly concerned by various countries. [0003] CO 2 In the capture technology, the use of ammonia and CO 2 A chemical reaction can greatly absorb CO 2 To achieve efficient capture of CO 2 the goal of. However, this method consumes a lot of energy, and the ammonia water used is relatively corrosive to the equipment, so the requirements for the equipment are high and the cost is high. In recent years, the use of various solid adsorbents for CO 2 Adsorption proceed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCY02C20/40
Inventor 尹双凤杨泛明刘英陈浪
Owner HUNAN UNIV
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