Modified montmorillonite carbon dioxide adsorption material and preparation method thereof

A carbon dioxide and adsorption material technology, applied in the field of modified montmorillonite carbon dioxide adsorption material and its preparation, can solve the problems of low carbon dioxide gas adsorption capacity, poor thermal stability, low selectivity, etc., and achieve easy large-scale production, thermal Good stability and the effect of improving the adsorption capacity

Inactive Publication Date: 2015-04-08
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the above materials have low adsorption capacity for carbon dioxide gas, low selectivity, and high cost
Some organic amine-loaded mesoporous carbon dioxide adsorption materials have the advantages of high adsorption capacity and good selectivity, but they also have problems such as poor thermal stability and high cost.

Method used

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  • Modified montmorillonite carbon dioxide adsorption material and preparation method thereof
  • Modified montmorillonite carbon dioxide adsorption material and preparation method thereof
  • Modified montmorillonite carbon dioxide adsorption material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Add 0.06mol titanium isopropoxide to 90mL 2mol / L hydrochloric acid solution to obtain titanium sol, continue to stir for 6 hours until the solution becomes clear, and obtain TiO 2 Intercalant;

[0032] (2) Ethyl orthosilicate, hydrochloric acid and ethanol are mixed uniformly according to the following ratio: 35g of ethyl orthosilicate, 8mL of 2mol / L hydrochloric acid, 16mL of ethanol, obtain SiO 2 Intercalant;

[0033] (3) Mix the intercalation agent prepared in steps (1) and (2), the mixing ratio is TiO 2 : SiO 2 =1:8, stirred at room temperature for 1 hour to obtain TiO 2 -SiO 2 Composite intercalation agent;

[0034] (4) Disperse 10g of montmorillonite in 1000g of pure water, then add the TiO described in (3) above 2 -SiO 2 Composite intercalation agent, the mixing ratio of composite intercalation agent and calcium carbonate equivalent of montmorillonite is 20:1; the mixed solution was stirred at 50°C for 3 hours, then centrifuged, washed and dried at roo...

Embodiment 2

[0036] (1) Add 0.03mol titanium isopropoxide to 150mL 1mol / L hydrochloric acid solution to obtain titanium sol, continue stirring for 3 hours until the solution becomes clear, and obtain TiO 2 Intercalant;

[0037] (2) Mix ethyl orthosilicate, hydrochloric acid and ethanol in the following proportions: 45 g of ethyl orthosilicate, 12 mL of 2mol / L hydrochloric acid, and 16 mL of ethanol to obtain SiO 2 Intercalant;

[0038] (3) Mix the intercalation agent prepared by the above (1) and (2), the mixing ratio is TiO 2 : SiO 2 =1:12. Stirring at room temperature for 3 hours yielded TiO 2 -SiO2 Composite intercalation agent;

[0039] (4) Disperse 20g of montmorillonite in 2000g of pure water, then add the TiO described in (3) above 2 -SiO 2 Composite intercalation agent, the mixing ratio of composite intercalation agent and calcium carbonate equivalent of montmorillonite is 30:1; the mixed solution was stirred at 50°C for 3 hours, then centrifuged, washed and dried at room te...

Embodiment 3

[0041] (1) Add 0.05mol titanium isopropoxide to 125mL 2mol / L hydrochloric acid solution to obtain titanium sol, continue stirring for 4 hours until the solution becomes clear, and obtain TiO 2 Intercalant;

[0042] (2) Mix ethyl orthosilicate, hydrochloric acid and ethanol in the following proportions: 45 g of ethyl orthosilicate, 10 mL of 2mol / L hydrochloric acid, and 16 mL of ethanol to obtain SiO 2 Intercalant;

[0043] (3) Mix the intercalation agent prepared by the above (1) and (2), the mixing ratio is TiO 2 : SiO 2 =1:12. Stirring at room temperature for 1 hour yielded TiO 2 -SiO 2 Composite intercalation agent;

[0044] (4) Disperse 20g of montmorillonite in 1500g of pure water, then add the TiO described in (3) above 2 -SiO 2 Composite intercalation agent, the mixing ratio of composite intercalation agent and calcium carbonate equivalent of montmorillonite is 25:1; the mixed solution was stirred at 80°C for 3 hours, then centrifuged, washed and dried at room t...

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Abstract

The invention discloses a modified montmorillonite carbon dioxide adsorption material and a preparation method thereof. According to the preparation method, a inorganic intercalation agent is used for intercalation so as to insert an inorganic substance into montmorillonite crystal layers, and increase the specific surface area of montmorillonite. The preparation method comprises following steps: preparation of TiO2 intercalation agent; preparation of SiO2 intercalation agent; preparation of TiO2-SiO2 composite intercalation agent; and preparation of the modified montmorillonite carbon dioxide adsorption material. The preparation method is simple; the specific surface area of the obtained modified montmorillonite carbon dioxide adsorption material ranges from 450 to 500m<2>/g; pore volume ranges from 0.28 to 0.32cm<3>/g; pore diameter ranges from 3 to 5nm; the modified montmorillonite carbon dioxide adsorption material possesses excellent absorption capacity on carbon dioxide; cycling stability is excellent; and compared with other modified molecular sieve porous materials, cost is reduced greatly, the modified montmorillonite carbon dioxide adsorption material is of no toxicity and is harmless, and is capable of satisfying industrial processes, especially carbon dioxide removing on absorption materials.

Description

technical field [0001] The invention belongs to the field of carbon dioxide capture and storage, in particular to a carbon dioxide adsorption material, in particular to a modified montmorillonite carbon dioxide adsorption material and a preparation method thereof. Background technique [0002] In recent years, the "greenhouse effect" has become one of the most significant environmental problems in the world today. A large number of studies have shown that the main cause of the greenhouse effect is directly related to the massive emission of greenhouse gases. There are more than 30 kinds of greenhouse gases, such as carbon dioxide, chlorofluoroalkane, methane, nitrous oxide, ozone, etc. Among them, carbon dioxide has the greatest impact on global climate change, and the contribution value of its concentration increase to the greenhouse effect is about 55%. When people use fossil fuels (such as coal, oil, etc.) in large quantities to generate energy or deforestation and burn ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30B01D53/02
CPCB01D53/02B01D2253/106B01J20/10B01J20/28054Y02C20/40
Inventor 闫新龙胡晓燕
Owner CHINA UNIV OF MINING & TECH
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