Organic-amine-porous composite material for adsorbing carbon dioxide efficiently
A technology for adsorbing carbon dioxide and composite materials, applied in the field of new mesoporous materials, can solve problems such as poor adsorption effect and inability to cope, and achieve the effects of saving energy, reducing costs, and reducing environmental pollution
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Embodiment 1
[0024] At room temperature, 2g P123(EO 20 PO 70 EO 20) was dissolved in a solution of 60g of 2M HCl and 15g of water, and 4.25g of ethyl orthosilicate was slowly added while stirring at 40°C, and the stirring was continued at 40°C for 24h, and then stood at 100°C for 24h. The white SBA-15 powder obtained by cooling, filtering, washing and drying at room temperature is referred to as SBA(P) sample for short. Take 0.2g of SBA-15 raw powder and add it to 0.2g of tetraethylenepentamine in 10g of ethanol solution, stir and reflux at 80°C for 2h, then evaporate to dryness at 80°C to obtain a sample loaded with 50wt.-% amine. Tetraethylenepentamine-SBA(P) composites with different loads were prepared in the same way. The obtained sample is denoted as SBA(P)-X, and X represents the weight percent content of tetraethylenepentamine in the sample. The obtained samples were analyzed by TG and gas chromatography for CO 2 Adsorption measurements, the adsorption data are listed in Table...
Embodiment 2
[0029] At room temperature, 1g NaOH is dissolved in 45g H 2 After O, 3g SiO 2 Heat to dissolve in this solution; at the same time, dissolve 4.5g of CTAB (cetyltrimethylammonium bromide) in 25g of water to obtain another solution. After mixing the two solutions at 25°C, slowly add 2M hydrochloric acid to adjust the pH to 11 while stirring, continue to stir at 25°C for 6h, and then stand at 100°C for 72h. Cool, filter, wash the white MCM-41 powder obtained by drying at room temperature. A certain amount of MCM-41 raw powder was added to 10 g of tetraethylenepentamine ethanol solution, stirred and refluxed at 80°C for 2 hours, then evaporated to dryness at 80°C to obtain tetraethylenepentamine-MCM-41 composites with different loadings. The obtained sample is denoted as MCM41-X, and X represents the percentage content of tetraethylenepentamine in the sample. The obtained samples were analyzed by TG and gas chromatography for CO 2 Adsorption measurements, and the adsorption dat...
Embodiment 3
[0032] After dissolving 2.4g CTAB (cetyltrimethylammonium bromide) in 50g water and 43g ethanol, add 12mL 30wt-% ammonia water, stir at room temperature for 10min, then add 3.4g TEOS (tetraethyl silicate) and continue stirring After 24 hours, filter and wash to obtain the original powder of MCM-48. Take 0.2g of MCM-48 raw powder and add it to 0.2g of tetraethylenepentamine in 10g of ethanol solution, stir and reflux at 80°C for 2h, evaporate to dryness at 80°C to obtain a sample loaded with 50wt.-% amine, and the obtained sample is designated as MCM48- 50, and analyzed by TG and gas chromatography, CO 2 The adsorption capacity reached 186mg / g.
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