Method for catching carbon dioxide by adopting alcohol amine type ion liquid

A technology of carbon dioxide and ionic liquids, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as easy oxidation of absorbents, high volatility of alcohol amines, and decreased energy output, so as to improve chemical stability, Enhanced anti-oxidation performance and reduced electronegativity

Inactive Publication Date: 2012-05-02
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the traditional industrial carbon dioxide capture method is mainly the alcohol amine aqueous solution absorption method, which has the advantages of low production cost, fast absorption speed, and large absorption capacity, but there are also some limitations: such as solvents are volatile, equipment is easy to corrode, absorption According to statistics, if thermal power plants use this method to separate and capture carbon dioxide, their total energy output will drop by a

Method used

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  • Method for catching carbon dioxide by adopting alcohol amine type ion liquid
  • Method for catching carbon dioxide by adopting alcohol amine type ion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In a 5ml glass vessel with an inner diameter of 1cm, add the ionic liquid diethoxyethylenediamine lithium bistrifluorosulfonimide ([Li(DOBA)][Tf 2 N]) 0.87g (0.02mol), then slowly feed carbon dioxide gas, flow 60ml / min, pressure 0.1MPa, control the absorption temperature to be 60°C, control the absorption time to be 0.5 hours, and weigh to show the absorption of carbon dioxide in the ionic liquid The capacity is 0.89 mol / mol ionic liquid.

Embodiment 2-7

[0018] Similar to Example 1, the carbon dioxide gas pressure is controlled to be 0.1MPa, the absorption temperature is 60° C., and the type of ionic liquid is changed. The results of carbon dioxide absorption are as follows (Table 1):

[0019] Table 1 Effect of different ionic liquid types on carbon dioxide capture

[0020] serial number

[0021] (h)

Embodiment 8-16

[0023] Similar to Example 1, using diethoxyethylenediamine lithium bistrifluorosulfonimide as absorbent, absorbing carbon dioxide gas, changing conditions such as absorption temperature, gas pressure and absorption time, the absorption results are as follows (Table 2 ):

[0024] Table 2 Effect of different absorption conditions on carbon dioxide absorption

[0025]

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Abstract

The invention relates to a method for catching carbon dioxide by adopting alcohol amine type ion liquid, which is used for catching carbon dioxide gas by using alcohol amine type ion liquid based on metallic cation chelate as absorbing agents. The absorption pressure is 0.0001 to 0.2MPa, the absorption temperature is 30 DEG C to 120 DEG C, the absorption time is 0.1 to 2 hours, the desorption temperature is between 80 DEG C and 150 DEG C, and the desorption time is between 0.1 hours and 3 hours. The method has the advantages that the ion liquid is easy to prepare, the stability is good, the absorption capacity is high, the desorption is easy, and the like. The method belongs to a carbon dioxide catching method with the industrial application potential.

Description

technical field [0001] The invention relates to an alcohol amine-type ionic liquid based on metal cation chelation, which is applied to the chemical capture of carbon dioxide, realizes high-capacity, low-energy consumption, and recyclable capture of carbon dioxide, and provides an effective method for the industrial capture of carbon dioxide. potential method. Background technique [0002] With the rapid development of human society, climate change brought about by the greenhouse effect has increasingly become a major problem faced by human beings, seriously affecting the living environment of 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. The research on its capture, storage and utilization technology has attracted extensive attention of scientists at home and abroad. In addition, carbon dioxide is a very important carbon-raw material, which can be converted i...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCY02C10/06Y02C20/40
Inventor 王从敏李浩然戴胜
Owner ZHEJIANG UNIV
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