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Preparation method of magnesium oxide-mesoporous carbon composite material

A composite material and mesoporous carbon technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of poor recycling performance, high energy consumption, and low adsorption capacity, and achieve excellent performance, high specific surface area, and reduced Effect of regenerative energy consumption

Inactive Publication Date: 2016-06-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditionally prepared MgO and its composites exist in CO 2 The problems of low adsorption capacity, poor recycling performance, and high energy consumption need to be solved urgently.

Method used

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  • Preparation method of magnesium oxide-mesoporous carbon composite material
  • Preparation method of magnesium oxide-mesoporous carbon composite material
  • Preparation method of magnesium oxide-mesoporous carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, see figure 1 and figure 2 , a preparation method of magnesium oxide-mesoporous carbon composite material MgO / C-1-500, comprising the steps of:

[0029] a. According to the formula mass ratio: F127 / resol / TEOS / EtOH / HCl / H2O=1.6:1.0:2.08:12:7.3×10 -3 : 1.0, prepare mesoporous carbon material, adopt nitric acid as oxidant, nitric acid is dissolved in water, make the nitric acid modifier solution that concentration is 5mol / l, then at 40 ℃, 1.0g mesoporous carbon material is immersed in the nitric acid of 20g In the modifier solution, stir for 4 hours to oxidize the surface of the mesoporous carbon material; then repeatedly wash and filter the oxidized mesoporous carbon material until the pH value of the filtrate is neutral, and the mesoporous carbon material is completed. preprocessing;

[0030] b. The mesoporous carbon material that has been pretreated in the above step a is subjected to vacuum desorption in a vacuum oven for 6 hours at a drying tempera...

Embodiment 2

[0034] This embodiment is basically the same as Embodiment 1, especially in that:

[0035] In this example, see figure 1 and figure 2 , a preparation method of magnesium oxide-mesoporous carbon composite material MgO / C-2-500, comprising the steps of:

[0036] a. This step is the same as in Embodiment 1;

[0037] b. This step is identical with embodiment one;

[0038]c. The volume ratio of the mixed components of water and ethanol is mixed in the ratio of 1:1, the mixed solution of water-ethanol system, then 1.45gMg(NO 3 ) 2 ·6H 2 O is fully dissolved in 10g of water-ethanol mixed solution to prepare a magnesium nitrate solution, and then the magnesium nitrate solution is added dropwise on the dry mesoporous carbon material, and then left to stand at room temperature for 24 hours, so that the magnesium nitrate solution is fully impregnated into the mesoporous carbon material. The surface of the porous carbon material is then placed in an oven at 80° C. for drying for 6...

Embodiment 3

[0041] This embodiment is basically the same as the previous embodiment, and the special features are:

[0042] In this example, see figure 1 and figure 2 , a preparation method of magnesium oxide-mesoporous carbon composite material MgO / C-3-500, comprising the steps of:

[0043] a. This step is the same as in Embodiment 1;

[0044] b. This step is identical with embodiment one;

[0045] c. The volume ratio of the mixed components of water and ethanol is mixed in the ratio of 1:1, the mixed solution of water-ethanol system, then 2.15gMg(NO 3 ) 2 ·6H 2 O is fully dissolved in 10g of water-ethanol mixed solution to prepare a magnesium nitrate solution, and then the magnesium nitrate solution is added dropwise on the dry mesoporous carbon material, and then left to stand at room temperature for 24 hours, so that the magnesium nitrate solution is fully impregnated into the mesoporous carbon material. The surface of the porous carbon material is then placed in an oven at 8...

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Abstract

The invention discloses a method for preparing a magnesium oxide-mesoporous carbon composite material. The mesoporous carbon is used as a carrier, and the carbon material is oxidized on the surface to make the material more likely to absorb a metal salt solution; the pore is removed in a vacuum oven. Moisture impurities, so that the pores are fully open; then the magnesium nitrate solution is added to the carbon material to make it completely absorbed; after the solution is completely volatilized, it is roasted under an inert gas to decompose the magnesium nitrate into magnesium oxide remaining in the mesoporous carbon. Inside the tunnel. The magnesium oxide / mesoporous carbon composite material prepared by the present invention has a high specific surface area and a high loading capacity of magnesium oxide, and exhibits good performance in carbon dioxide adsorption at a relatively high temperature: at 50-80°C, 0.1-0.2Mpa , the CO2 adsorption capacity is 2.0~2.5mmol / g, and the adsorbent can be reduced and regenerated at a temperature of 350°C-500°C. It is a CO2 adsorption material with application prospects.

Description

Technical field [0001] The present invention involves a method of adsorbing materials, especially the preparation method of carbon composite adsorbing materials, which is used in the field of carbon dioxide absorption and separation technology. Background technique [0002] Due to global industrialization, carbon dioxide emissions generated by artificially increased year by year, by 2012, the CO discharged from human activities in 2012 2 It has reached 9.7 billion tons.As a result, it exacerbates global warming, causing natural disasters such as the melting of the polar glaciers and the empty ozone layer.And this kind of human emission CO 2 It mainly comes from burning fossil fuel.Therefore, how to capture CO from the coal power plant 2 Become the focus of attention to the whole society. [0003] The alcohol absorption method has become the main industrial carbon dioxide absorption and capture technology because it has high capacity and high selectivity for acid gas absorption.Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/32
Inventor 李鉴远孙俭王慧张丽君
Owner SHANGHAI UNIV
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