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Mixed solvent for trapping carbon dioxide

A mixed solvent and carbon dioxide technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of expensive preparation cost, complicated preparation process, unsuitable for large-scale promotion, etc., to avoid volatilization and loss, increase Absorption capacity and viscosity reduction effect

Active Publication Date: 2012-11-28
SHAOXING UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the raw materials and preparation costs of such ionic liquids are relatively expensive, and the preparation process is relatively complicated, it is not yet suitable for large-scale promotion in industrial processes.

Method used

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  • Mixed solvent for trapping carbon dioxide
  • Mixed solvent for trapping carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-12

[0024] In a glass vial with a diameter of about 1 cm and a volume of about 5 mL, mix the organic base and the alcohol amine ionic liquid in different proportions as above, stir magnetically, control the adsorption temperature to 30 ° C, and then slowly introduce carbon dioxide gas , control the flow rate of carbon dioxide to 50mL / min, the adsorption pressure to 0.1MPa, weigh after adsorption to saturation, and the results of capturing carbon dioxide are shown in Table 1.

[0025] Table 1 The effect of mixed solvents with different component ratios on carbon dioxide capture

[0026]

[0027] In the present invention, mol / mol IL represents the amount of carbon dioxide absorbed per mole of ionic liquid or organic base.

Embodiment 24

[0033] Magnetically stir the mixed solvent in which carbon dioxide is absorbed to saturation in Examples 1-12, and slowly introduce high-purity nitrogen, wherein the flow rate of high-purity nitrogen is 50mL / min, the pressure of high-purity nitrogen is 0.1MPa, and the desorption temperature is controlled at 80°C, the desorption time is about 0.5 hours, and the weighing results show that the carbon dioxide absorbed in the mixed solvent has been completely desorbed.

[0034] The results show that under the same adsorption conditions, the mixed solution of the present invention has a carbon dioxide adsorption capacity much higher than that of a single alcohol ammonia ionic liquid or an organic base, and the desorption only takes about 0.5 hours, and the desorption speed is also very fast, reducing the The loss of solvent can be recycled.

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Abstract

The invention relates to a mixed solvent for trapping carbon dioxide, and belongs to the technical field of separating gas by an adsorption effect. The mixed solvent for trapping the carbon dioxide is prepared by compounding and mixing organic alkali and alcohol amine ionic liquid, wherein the molar ratio of the organic alkali to the alcohol amine ionic liquid is (1: 1)-(3: 1). By compounding the organic alkali with high boiling point and the alcohol amine ionic liquid, the mixed solvent improves the absorptive capacity for the carbon dioxide gas, and reduces the consumption of the solvent in a using process; and the mixed solvent has the advantages of being simple to prepare, high in absorptive capacity and capable of being recycled.

Description

technical field [0001] The invention relates to a mixed solvent for capturing carbon dioxide and belongs to the technical field of gas separation through adsorption. Background technique [0002] In recent years, with the widespread use of fossil fuels such as coal, oil and natural gas, the emission of carbon dioxide has increased year by year, which has exacerbated the greenhouse effect and endangered the ecological environment. Therefore, the control of carbon dioxide emission and the capture of carbon dioxide have attracted widespread attention. At the same time, carbon dioxide is also an important carbon resource that can be converted into important chemical raw materials and intermediates. Therefore, it is of great significance to study the capture, fixation and conversion of carbon dioxide, and has become a hot issue of common concern worldwide. [0003] Solvent (liquid) absorption method is currently the most widely used separation technology for capturing carbon dio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 许映杰
Owner SHAOXING UNIVERSITY
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