Preparation method of magnesium oxide-mesoporous carbon composite material

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

Inactive Publication Date: 2014-09-03
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, dissolve nitric acid in water, make the nitric acid modifier solution that concentration is 5 mol / l, then at 40 ℃, 1.0g mesoporous carbon material is immersed in 20g of In the nitric acid 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. material pretreatment;

[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 tempe...

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 identical with embodiment one;

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

[0038] c. With the mixed component volume ratio of water and ethanol is mixed in the ratio of 1:1, the mixed solution of water-ethanol system, then 1.45g Mg(NO 3 ) 2 ·6H 2 O was fully dissolved in 10 g of water-ethanol mixed solution to prepare a magnesium nitrate solution, then added the magnesium nitrate solution to the dry mesoporous carbon material drop by drop, and then stood at room temperature for 24 hours to fully impregnate the magnesium nitrate solution The surface of the mesoporous carbon material is then put into an oven at 80° C. to dry for 6 hours, so that the water and ethanol solvent of the magne...

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 identical with embodiment one;

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

[0045] c. With the mixed component volume ratio of water and ethanol is mixed in the ratio of 1:1, the mixed solution of water-ethanol system, then 2.15g Mg(NO 3 ) 2 ·6H 2 O was fully dissolved in 10 g of water-ethanol mixed solution to prepare a magnesium nitrate solution, then added the magnesium nitrate solution to the dry mesoporous carbon material drop by drop, and then stood at room temperature for 24 hours to fully impregnate the magnesium nitrate solution The surface of the mesoporous carbon material is then put into an oven at 80° C. to dry for 6 hours, so that the water and ethan...

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Abstract

The invention discloses a preparation method of a magnesium oxide-mesoporous carbon composite material. The method is characterized by comprising the following steps: oxidizing the surface of a carbon material by adopting mesoporous carbon as a carrier, so that the carbon material is more likely to adsorb a metal salt solution; eliminating water impurities in pores in a vacuum drying box, so that the pores are adequately opened; adding a magnesium nitride solution onto the carbon material to be completely absorbed; and roasting the carbon material under the inert gas after the solution is completely volatized, so that the magnesium nitride is decomposed into magnesium oxide to be remained in the pores of the mesoporous carbon. The magnesium oxide-mesoporous carbon composite material prepared by the method is high in specific surface area and high in magnesium oxide loading capacity; when being applied to the carbon dioxide adsorption at a high temperature, the magnesium oxide-mesoporous carbon composite material has the following good properties: the adsorption capacity of CO2 at the temperature of 50 to 80 DEG C and the pressure of 0.1MPa to 0.2MPa is 2.0 to 2.5 mmol/g, the adsorption agent can be reduced and regenerated at the temperature of 350 to 500 DEG C, and the magnesium oxide-mesoporous carbon composite material is a CO2 adsorption material with a promising application prospect.

Description

technical field [0001] The invention relates to a preparation method of an adsorption material, in particular to a preparation method of a carbon composite adsorption material, which is applied in the technical field of carbon dioxide absorption, capture and separation. Background technique [0002] Due to global industrialization, man-made carbon dioxide emissions are increasing year by year. By 2012, the global CO2 emissions due to human activities 2 It has reached 9.7 billion tons. The result is exacerbating global warming, causing natural disasters such as the melting of polar glaciers and the hole in the ozone layer. And this anthropogenic CO 2 Mainly from burning fossil fuels. So, how to capture CO from coal power plants 2 become the focus of attention of the whole society. [0003] The alcohol amine absorption method has become the main carbon dioxide absorption and capture technology in the industry because of its high capacity and high selectivity for acid gas...

Claims

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Application Information

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Patent Type & Authority Applications(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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