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A method to enhance amino-functionalized carbon capture using steric synergy

An amino-functionalized and synergistic technology, applied in the field of high-efficiency carbon capture of amino-functionalized ionic liquids, can solve the problems of easy corrosion of equipment, easy oxidation of absorbents, easy volatilization of solvents, etc., and achieve the effect of improving the use efficiency.

Inactive Publication Date: 2018-05-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main method of traditional industrial capture of carbon dioxide is the alcohol amine aqueous solution absorption method, which has the advantages of low raw material cost, fast absorption speed, and large absorption capacity, but there are also some limitations: such as the solvent is volatile and the equipment is easy to corrode , the absorbent is easy to oxidize, and the regeneration energy consumption is high. According to statistics, if a thermal power plant adopts this method to capture carbon dioxide, it needs to consume about 30% of the energy of the power plant

Method used

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  • A method to enhance amino-functionalized carbon capture using steric synergy
  • A method to enhance amino-functionalized carbon capture using steric synergy
  • A method to enhance amino-functionalized carbon capture using steric synergy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a 5ml glass vessel with an inner diameter of 1cm, add the ionic liquid tetradecyltrihexylphosphine 5 aminomethyltetrazole ([P 66614 ][MA-Tetra]) 0.50g (0.008mol), and then placed in a sealed tank with a carbon dioxide pressure of 0.1MPa, the absorption temperature was controlled to be 30°C, and the absorption time was controlled to be 3 hours. The weighing showed that the absorption of carbon dioxide in the ionic liquid The capacity is 1.13 mol / mol ionic liquid.

Embodiment 2-5

[0020] Similar to Example 1, the carbon dioxide gas pressure is controlled to be 0.1MPa, the absorption temperature is 30° C., and the type of ionic liquid is changed. The results of carbon dioxide absorption are as follows (Table 1):

[0021] Table 1 Effect of different ionic liquid types on carbon dioxide capture

[0022]

Embodiment 7-13

[0027] Similar to Example 1, adopt tetradecyl trihexylphosphine 5 aminomethyl tetrazole as absorbent, absorb carbon dioxide gas, change conditions such as absorption temperature and absorption time, absorption result is as follows table (table 2):

[0028] Table 2 Effect of different absorption conditions on carbon dioxide absorption

[0029]

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Abstract

The invention mainly discloses a method for improving amino functional carbon capture through spatial synergistic effect.With functionalized ion liquid, which can form amino anions of a dihydrogen bond structure in molecules, being absorbent, carbon dioxide is absorbed, wherein absorbing pressure is 0.0001-0.2 MPa, absorbing temperature is 20-100 DEG C, absorbing time is 01-3 hours, absorbed carbon dioxide is quite easy to desorb, desorption temperature is 60-120 DEG C, and desorption time is 0.1-3 hours.Compared with a traditional amino functional capturing agent, through designing amino functionalized ion liquid of different spatial structures, through intramolecular hydrogen bond action between anions and formed carbamic acid, monomolecular amino and dimolecular carbon dioxide can act, in this way, the using efficiency of amino is greatly improved, and 1.43 moles of carbon dioxide can be captured to the maximum per mole of amino.

Description

technical field [0001] The invention mainly relates to a method for high-efficiency carbon capture by amino-functionalized ionic liquids, specifically, a method for realizing high-capacity carbon capture by amino-functionalized ionic liquids by using spatial synergy effects. Background technique [0002] The massive emissions of greenhouse carbon dioxide affect ecology, the environment and human health. The development of efficient, economical and energy-saving carbon capture technology has aroused extensive attention of researchers at home and abroad. Amino-functionalized materials have the advantages of high capacity and high selectivity, and are currently considered to have the most potential for industrialization of new carbon capture. How to improve the utilization rate of amino groups and achieve high-capacity capture of carbon dioxide is the key issue in the current carbon capture technology of amino-functional materials. [0003] At present, the main method of trad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D2252/20Y02A50/20Y02C20/40
Inventor 王从敏罗小燕李浩然
Owner ZHEJIANG UNIV