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Layered absorbent for trapping CO2 in tail gas

An absorbent and tail gas technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of weak anti-oxidative degradation ability, high regeneration temperature, low decarbonization ability, etc., and achieve fast absorption rate, The effect of low regeneration temperature and low regeneration energy consumption

Inactive Publication Date: 2016-03-23
SINOPEC ENERGY & ENVIRONMENTAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the above solvent patents have their own advantages, their comprehensive decarburization ability is generally low, and they are highly corrosive and easy to foam, especially the desorption energy consumption is high, the regeneration temperature is high, and the ability to resist oxidation and degradation is not strong.

Method used

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  • Layered absorbent for trapping CO2 in tail gas
  • Layered absorbent for trapping CO2 in tail gas
  • Layered absorbent for trapping CO2 in tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare 300L layered absorbent, in which the composition and content of each component are as follows:

[0028] The total content of the basic absorbent is 30wt%, wherein, the content of N-methyldiethanolamine is 20wt%, the content of N,N-dimethylethanolamine is 10wt%; the total content of the activator is 3wt%, wherein, two The content of ethanolamine is 2wt%, the content of diisopropanolamine is 1wt%; 0.5wt%; the total content of organic solvent is 30wt%, wherein, the content of methanol is 20wt%, the content of isopropyl acetate is 10wt%; the content of water is 35.5wt%.

[0029] The testing process is: see figure 1 , the temperature is 40 °C, the gas phase CO 2 The partial pressure is 0.2MPa, the volume fraction is 30% containing CO 2 , O 2 and N 2The mixed gas (simulated exhaust gas of coal chemical plant) is input into the 500Nm gas filled with the above layered absorbent 3 / dCO 2 Pilot test device for capture continuous test, in which the absorption tower ...

Embodiment 2

[0033] Prepare 300L layered absorbent, in which the composition and content of each component are as follows:

[0034] The total content of the basic absorbent is 30wt%, wherein, the content of N-methyldiethanolamine is 20wt%, the content of N,N-dimethylcyclohexylamine is 10wt%; the total content of the activator is 3wt%, wherein , the content of diethanolamine is 2wt%, the content of diglycolamine is 1wt%; The content is 0.5wt%; the total content of organic solvent is 30wt%, wherein, the content of methanol is 20wt%, the content of n-propanol is 10wt%; the content of water is 35.5wt%.

[0035] The test process is the same as in Example 1, and the relevant data results are shown in Table 2.

[0036] Table 2 Layered absorbent absorption and desorption test results

[0037]

Embodiment 3

[0039] Prepare 300L layered absorbent, in which the composition and content of each component are as follows:

[0040] The total content of the basic absorbent is 30wt%, wherein, the content of N-methyldiethanolamine is 20wt%, the content of 1,4-diaminobutane is 10wt%; the total content of the activator is 3wt%, wherein, two The content of glycol amine is 2wt%, the content of triethylene glycol amine is 1wt%; 0.5wt%; the total content of organic solvent is 30wt%, wherein, the content of methanol is 20wt%, the content of phenylethyl alcohol is 10wt%; the content of water is 35.5wt%.

[0041] In addition to CO in the mixed gas 2 Except that the partial pressure is 0.4MPa, the test process is the same as in Example 1, and the relevant data results are shown in Table 3.

[0042] Table 3 Layered absorbent absorption and desorption test results

[0043]

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Abstract

The present invention provides a layered absorbent for trapping CO2 in tail gas. The absorbent comprises a basic absorbent, an activation agent, a boiling point increasing agent, water and an organic solvent; the basic absorbent is selected from one or more of N,N-dimethylethanolamine, N,N- diethyl ethylene diamine, N,N-dimethyl cyclohexyl amine, N-methyldiethanolamine, 1,4-diaminobutane, 1,5-diaminopentane, bis(2-ethylhexyl)amine, octodrine, di-n-propylamine, tripropylamine and paranitroaniline; the activation agent is selected from one or more of diisopropanolamine, diethanol amine, diglycolamine, triethylene glycol amine, and morpholine; the boiling point increasing agent is selected from one or more of dimethylformamide, dimethylacetamide, ethylene glycol monomethyl ether, and oxalic acid; and the organic solvent is selected from one or more of methanol, ethanol, benzyl alcohol, phenylethanol, n-propyl alcohol, and isopropyl acetate. The layered absorbent for trapping CO2 in the tail gas is high in absorbing ability, fast in absorption rate, low in regeneration temperature, and low in regeneration energy consumption.

Description

technical field [0001] The invention belongs to the technical field of gas separation, in particular to a method for capturing CO in tail gas 2 layered absorbent. Background technique [0002] With the rapid development of the economy, the demand for energy in countries around the world is increasing, and fossil fuels occupy an important position in the energy structure. The consumption of fossil fuels is one of the main causes of global environmental degradation and the largest source of emissions of greenhouse gases, CO 2 It is the most important greenhouse gas that causes the global greenhouse effect and causes climate change. Coal-fired power plants, gas-fired power plants, and refineries are the largest contributors to China's CO2 emissions. 2 In recent years, chemical fertilizer plants, synthetic ammonia plants, nitrogen fertilizer plants, methanol plants, and coal chemical plants have also become major sources of CO emissions. 2 main source. The current chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 陆诗建张建李清方刘海丽张启阳祝威尚明华张媛媛陆胤君文海力
Owner SINOPEC ENERGY & ENVIRONMENTAL ENG CO LTD
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