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High-performance CO2 adsorption material and preparation method thereof

An adsorption material, CO2 technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problem of low adsorption capacity, and achieve the effects of high adsorption performance, easy product availability, and simple synthesis conditions.

Active Publication Date: 2016-01-06
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although studies have shown that modified magnesium oxide can increase its CO 2 adsorption capacity, but the adsorption capacity is still low and becomes a limiting factor in practical applications

Method used

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  • High-performance CO2 adsorption material and preparation method thereof

Examples

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Effect test

example 1

[0019] Example 1. Preparation of M%Li x Na y K z NO 3 / Light MgO

[0020]Dissolve a certain amount of lithium nitrate, sodium nitrate, and potassium nitrate in a certain amount of deionized water, mix well and put them in a beaker. A certain amount of light MgO powder was gradually added to the above aqueous solution to make Li x Na y K z NO 3 The molar ratio to light MgO is M%, and it becomes viscous after stirring continuously for 1h. The mixture was dried in an oven at 120°C for 12h, then the dried powder was ground into a powder in a mortar, and calcined at a certain temperature (such as 450°C) for 4h to obtain M%Li x Na y K z NO 3 / light MgO.

example 2

[0021] Example 2.CO 2 Test method for adsorption performance

[0022] Take about 10 mg of the prepared M%Li x Na y K z NO 3 / light MgO adsorption material, its CO was tested by thermogravimetric analyzer 2 Adsorption properties. In a thermogravimetric analyzer, the sample is first 2 The calcination temperature T for the preparation of adsorbent materials in the environment 1 Keep it at low temperature (such as 450°C) for 1h, then cool down (or heat up) to the adsorption temperature T 2 (eg 300°C) for 40 minutes. At this point into the CO 2 Start to adsorb, and the adsorption time lasts for 4h. Calculate the corresponding calcination temperature T through the change of adsorbent mass 1 and adsorption temperature T 2 the amount of adsorption.

example 3

[0023] Example 3. Alkali metal nitrate loading vs. Li 0.3 Na 0.18 K 0.52 NO 3 / CO of light MgO adsorbent material 2 Effect of adsorption performance

[0024] This example adopts the method of example 1 to prepare different Li 0.3 Na 0.18 K 0.52 NO 3 / light MgO adsorption material (calcination temperature 450°C), and test its CO at 300°C by the method described in Example 2 2 Adsorption properties. Table 1 summarizes the Li 0.3 Na 0.18 K 0.52 NO 3 / Li in light MgO adsorbent material 0.3 Na 0.18 K 0.52 NO 3 loading of CO 2 effect on adsorption performance. When Li 0.3 Na 0.18 K 0.52 NO 3 When the loading amount is 5, 10, 15, 20, 25mol% (that is, when M=5, 10, 15, 20, 25), its CO 2 The adsorption amounts were 10.97, 12.34, 11.93, 10.61, and 8.54 mmol / g, respectively. The results of this example show that CO 2 The adsorption performance of Li x Na y K z NO 3 The effect of load is significant.

[0025] Table 1 Alkali metal nitrate loading vs. Li 0.3 ...

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Abstract

The invention provides a high-performance CO2 adsorption material and a preparation method thereof. The high-performance CO2 adsorption material is prepared from M% of LixNayKzNO3 / light MgO, wherein M% is the mole percentage of LixNayKzNO3 and light MgO, M is larger than 1 and smaller than 40, the sum of x, y and z is 1, and none of x, y and z is zero. The high-performance CO2 adsorption material is characterized in that three types of alkali metal nitrates including LiNO3, NaNO3 and KNO3 are evenly loaded on the surfaces of light MgO at the same time. The preparation method of the alkali metal nitrites includes the steps of dissolving a certain amount of LiNO3, NaNO3 and KNO3 in water, weighing an appropriate amount of light MgO powder to be dispersed in the aqueous solution, sufficiently and evenly stirring the mixture, and obtaining the target adsorption material after drying and specific calcining are conducted. The high-performance CO2 adsorption material has excellent CO2 adsorption performance within the temperature range of 200 DEG C to 400 DEG C. The synthesis conditions required by the preparation method are simple, the preparation cost is low, industrialized production can be easily achieved, and the high-performance CO2 adsorption material prepared through the method has important application prospects in the field of CO2 capture.

Description

technical field [0001] This patent relates to a high performance CO 2 Adsorbent material M%Li x Na y K z NO 3 / light MgO (M% is Li x Na y K z NO 3 Mole percentage with light MgO, 1<M<40; x+y+z=1, and x, y, z are all not 0) and its preparation method. Background technique [0002] Global warming has become an international hot topic. Climate change has caused a series of problems such as melting glaciers, rising sea levels, and drought, which seriously threaten the survival and development of human beings. while CO 2 As one of the main components of greenhouse gases that cause global warming, it has attracted widespread attention. CO 2 Emission reduction has been the focus of international attention in recent years. Since most of the CO 2 Emissions come from the combustion of fossil fuels. Although many current studies are devoted to exploring renewable clean energy, the structure of fossil fuels (such as coal, oil, and natural gas) as the most important ...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/30B01D53/02
CPCY02C20/40
Inventor 王强王君雅乔亚倩
Owner BEIJING FORESTRY UNIVERSITY