Method for obviously improving carbon capture performance by utilizing multipoint synergistic effect

A synergistic, multi-site technology, applied in separation methods, chemical instruments and methods, carbon compounds, etc., can solve the problems of small absorption capacity, large absorption energy, easy corrosion of equipment, etc., to improve absorption capacity and reduce absorption energy. , the effect of speeding up

Inactive Publication Date: 2013-02-13
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the traditional industrial method of capturing carbon dioxide is the 30% alcohol amine aqueous solution absorption method, which has the advantages of low cost, fast absorption, large capacity, etc., but There are also some obvious limitations: such as the solvent is volatile, the equipment is easy to corrode, the absorbent is easy to oxidize, and the regeneration energy consumption is high.
At present, the main problem of capturing carbon dioxide by ionic liquids is that although the absorption energy of physical absorption is small, the absorption capacity is too small; while the chemical absorption capacity is close to 1.0 mole per mole, and the absorption energy is relatively large, generally greater than 60kJ mol-1

Method used

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  • Method for obviously improving carbon capture performance by utilizing multipoint synergistic effect
  • Method for obviously improving carbon capture performance by utilizing multipoint synergistic effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 5ml glass container with an inner diameter of 1cm, add the ionic liquid tetradecyl trihexylphosphorus triazole ([P 66614 ][2-Hyp]) 1.2g (0.02mol), then slowly introduce carbon dioxide gas, the flow rate is 60ml / min, the pressure is 0.1MPa, the absorption temperature is controlled at 20°C, and the absorption time is controlled at 1.0 hours. The weighing shows that the ionic liquid The absorption capacity of carbon dioxide in the medium is 1.58 moles per mole of ionic liquid. The absorption energy of the ionic liquid is -33kJ mol -1 .

[0023]

Embodiment 2-8

[0025] Similar to Example 1, the carbon dioxide gas pressure was controlled to 0.1 MPa, the absorption temperature was 20°C, and the type of ionic liquid was changed. The results of carbon dioxide absorption are shown in the following table (Table 1):

[0026] Table 1 Effect of different ionic liquids on carbon dioxide capture

[0027]

Embodiment 9-20

[0029] Similar to Example 1, tetradecyltrihexylphosphine 2-hydroxypyridine was used as the absorbent to absorb carbon dioxide gas, and the absorption temperature, gas pressure, and absorption time were changed. The absorption results are shown in the following table (Table 2):

[0030] Table 2 Effect of different absorption conditions on carbon dioxide absorption

[0031] serial number Pressure (MPa) temperature (°C) time (h) Carbon dioxide absorption (mol / mol IL) 8 0.1 30 1.0 1.42 9 0.1 40 1.0 1.39 10 0.1 50 1.0 1.22 11 0.1 60 0.5 1.13 12 0.1 70 0.5 0.93 13 0.1 80 0.5 0.71 14 0.1 100 0.5 0.49 15 0.1 120 0.5 0.37 16 0.05 20 2.0 1.49 17 0.01 20 2.0 1.32 18 0.01 40 1.5 1.05 19 0.01 60 1.0 0.72 20 0.01 100 0.5 0.31

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Abstract

The invention relates to a method for obviously improving carbon capture performance by utilizing multipoint synergistic effect. The method utilizes an alkalescent functionalized ion liquid containing a plurality of acting sites as an absorbent to absorb carbon dioxide gas, absorption pressure is 0.0001-0.2MPa, absorption temperature is 10 DEG C to 100 DEG C, and absorption time is 0.1 hour to 2 hours. Desorption temperature is between 80 DEG C and 150 DEG C, and desorption time is between 0.1 hour and 3 hours. The method has the advantages of being good in ion liquid stability, high in absorption capacity, easy in desorption and the like, thereby having large industrial application potentiality.

Description

technical field [0001] The invention relates to an alkaline ionic liquid containing multiple action sites, which is applied to the chemical capture of carbon dioxide, and utilizes the multi-site synergistic effect to realize a high-capacity, low-energy-consumption, and recyclable capture method for carbon dioxide. Industrial capture of carbon dioxide offers a promising approach. [0002] Background technique [0003] With the rapid development of human society and the improvement of people's living standards, climate change brought about by the greenhouse effect has increasingly become a major environmental problem faced by human beings. In recent years, as a major greenhouse gas, the emission of carbon dioxide has increased year by year, which has exacerbated the greenhouse effect and seriously affected human survival and the ecological environment. Its capture, storage and utilization have attracted widespread attention at home and abroad . In addition, carbon dioxide c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/62C01B31/20C01B32/50
CPCY02A50/20Y02P20/151
Inventor 王从敏郭燕崔国凯李浩然
Owner ZHEJIANG UNIV
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