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Novel method for capturing and separating carbon dioxide

A technology of carbon dioxide and a new method, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc., to achieve the effects of environmental friendliness, low energy consumption, and small space occupation

Active Publication Date: 2012-07-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the use of supergravity technology and the use of ionic liquids as absorbents for carbon dioxide removal at room temperature have not been reported at home and abroad.

Method used

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  • Novel method for capturing and separating carbon dioxide
  • Novel method for capturing and separating carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Raw material gas composition: nitrogen: 89.9%, carbon dioxide: 10.0% and the balance is inert gas.

[0022] The absorbent is [Proline Hydroxycholine Salt] ([Choline][Pro]). Adjust the temperature of the system to 20°C, adjust the pressure to 0.1Mpa, start the supergravity rotating bed reactor, adjust the rotor speed to 2825r / m, and then open the control valve of the liquid inlet of the reactor, and the absorbent is distributed by the liquid through the liquid phase inlet pipe 1 The device is sprayed to the inner edge of the supergravity rotating bed rotor 4, and the flow rate of the regulating liquid is 2.65L / h. 2 The mixed gas enters the high-gravity rotating bed reactor through the gas phase inlet pipe 2, and countercurrently contacts with the absorption liquid in the rotor of the high-gravity rotating bed, and performs CO under high-gravity conditions. 2 The trap is then discharged from the gas phase outlet 5 and enters the subsequent section. The gas flow rate is ...

Embodiment 2-19

[0024] Process flow and step are with embodiment 1, and the flow rate of temperature, pressure, gas-liquid, rotor speed and test result of each embodiment are shown in Table 1.

[0025] The absorbent is ionic liquid [proline hydroxycholine salt] ([Choline][Pro]), [1-(3-propylamino)-3-butylimidazole tetrafluoroborate] ([Apbim][ BF 4 ]), [1-(3-propylamino)-3-butylimidazolium hexafluorophosphate] ([Apbim][PF 6 ]) and other ionic liquids with amino groups as functional groups or mixtures thereof.

[0026] The volume flow ratio of the absorbent to the mixed gas is 50-500:1.

[0027]Table 1 Process conditions and experimental results of each embodiment

[0028]

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Abstract

The invention discloses a novel method for capturing and separating carbon dioxide, which is applicable to capturing and separating CO2 from tail gas in gas purification, emission reduction of greenhouse gas and process industry and from oil field gas. According to the method, with a high-gravity rotating bed as a rotator and ionic liquid as an absorbent, the absorbent and a mixed gas containing CO2 are in countercurrent or cross-current contact in the high-gravity rotating bed to capture CO2, and the volume-flow ratio of gas to liquid is (50-500):1; the rotating speed of the high-gravity rotating bed is 100-400 rpm; the absorbent is the ionic liquid including amino functional groups or mixture thereof; the pressure in absorption is 0.1-4.0 MPa and the temperature is 15-60 DEG C; and the removal rate of CO2 in raw gas can reach more than 95% (volume). The novel method disclosed by the invention has the advantages of low investment of equipment, small occupied area, low energy consumption, environment friendliness and no corrosion to equipment and the like.

Description

technical field [0001] The invention relates to an ionic liquid as an absorbent and a high-gravity rotating bed as a reactor to capture and separate CO in a mixed gas 2 new method. The method can be used for gas purification and greenhouse gas emission reduction. Suitable for CO in process industry tail gas and oilfield associated gas 2 capture separation. Background technique [0002] Carbon dioxide is the main greenhouse gas that causes the greenhouse effect. Statistics show that the carbon dioxide emitted to the atmosphere from the tail gas due to the burning of fossil fuels in the process industry accounts for about three-quarters of the total carbon dioxide emissions. In addition, the associated gas in the process of oil extraction is also an important source of carbon dioxide. Controlling greenhouse gas emissions and mitigating climate change has become an important part of my country's sustainable development strategy. Carbon dioxide capture and purification met...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/18C01B31/20C01B32/50
CPCY02C10/06Y02A50/20Y02C20/40Y02P20/151
Inventor 陈建峰张亮亮王洁欣
Owner BEIJING UNIV OF CHEM TECH
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