Method for preparing magnesium oxide modified mesoporous material for adsorbing carbon dioxide

A technology of mesoporous material and carbon dioxide, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problem that the hydrothermal stability is difficult to meet the requirements, and achieve the advantages of industrial production and popularization, good recycling performance, The effect of reducing emissions

Inactive Publication Date: 2010-09-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have found that although mesoporous materials are modified with organic basic groups, although the adsorption capacity is relatively high, the hydrothermal stability is difficult to meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of magnesium oxide-modified mesoporous materials for carbon dioxide adsorption by one-step synthesis method

[0026] 2gP123 and 0.56gMgCl 2 ·6H 2 O in 9mlHCl and 60mlHO 2 Fully dissolve in the hydrochloric acid solution formed by O, add 14ml tetraethyl silicate (TEOS), stir magnetically at 40°C for 24 hours to form a sol, stand at 100°C for 24 hours, dry and calcinate at 550°C for 6 hours to obtain magnesium oxide Modified mesoporous materials.

Embodiment 2

[0027] Example 2: Preparation of magnesium oxide-modified mesoporous materials for carbon dioxide adsorption by one-step synthesis method

[0028] 2gP123 and 1.45gMg(CH 3 COO) 2 In 9mlHCl and 60mlH 2 Fully dissolve in the hydrochloric acid solution formed by O, add 14ml tetraethyl silicate (TEOS), stir magnetically at 40°C for 24 hours to form a sol, stand at 100°C for 24 hours, dry and calcinate at 550°C for 6 hours to obtain magnesium oxide Modified mesoporous materials.

[0029] The magnesium oxide-modified mesoporous material obtained in Examples 1 and 2 above has an adsorption capacity of 34 mg / g.

Embodiment 3

[0030] Example 3: Preparation of magnesium oxide-modified mesoporous materials for carbon dioxide adsorption by post-impregnation modification

[0031] 2gP123 in 9mlHCl and 60mlH 2 Fully dissolve in the hydrochloric acid solution formed by O, add 14ml tetraethyl silicate (TEOS), stir magnetically at 40°C for 24 hours, and stand at 100°C for 24 hours to form a sol, which is dried and calcined at 550°C for 6 hours. The obtained sample is in the MgNO of 1mol / L 3 The magnesium oxide modified mesoporous material was obtained after immersing in the solution for 6 hours at 80° C. and calcining at 500° C. for 6 hours.

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Abstract

The invention provides a method for preparing a magnesium oxide modified mesoporous material for adsorbing carbon dioxide. The material is prepared by using a one-step synthetic method, namely the method comprises the following steps of: dissolving P123 serving as a template agent and MgCl2.6H2O into hydrochloric solution fully, adding tetraethyl silicate, and drying and calcining the mixture to prepare the MgO modified mesoporous material directly; or the material is prepared by using a later-period immersing method, namely the method comprises the following steps of: dissolving the P123 serving as the template agent into the hydrochloric solution fully, adding the tetraethyl silicate, immersing a mesoporous material prepared by drying and calcination in MgNO3 solution, and calcining the mesoporous material to prepare the MgO modified mesoporous material. The material provided by the invention has the high capability of adsorbing carbon dioxide, and simultaneously, the preparation method is simple and easy to control and avoids equipment corrosion in the process of production and use.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide adsorption, in particular to a preparation method of a magnesium oxide modified mesoporous material used for carbon dioxide adsorption. Background technique [0002] Currently, global warming is the greatest threat to the human living environment. Global warming is not simply environmental pollution and ecological disasters. It destroys the climate system of the entire earth and triggers a series of chain reactions. The consequences are irreversible. The "La Nina" phenomenon manifested as large-scale low temperature, rain and snow, and freezing disasters, and the phenomenon of blizzards, floods, and droughts in many parts of the world are not unrelated to the background of global warming. Research in academic circles believes that carbon dioxide, carbon dust, and methane generated by stacking garbage are the main causes of global warming, and the emission of carbon dioxide, which is the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/32C01B31/20C01B32/50
Inventor 刘启明马娟娟
Owner WUHAN UNIV OF TECH
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