Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for absorbing carbon dioxide by using mixed solution containing ionic liquid

An ionic liquid and mixed solution technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as limited practicability, limited carbon dioxide absorption pressure, etc., to improve solubility, improve absorption performance, and improve separation efficiency. Effect

Inactive Publication Date: 2012-07-25
BEIJING UNIV OF CHEM TECH
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are US6579343 (2003), US7527775 (2009), US0266230 (2009), US0251558 (2006), and US0129598 (2005) patents related to ionic liquid absorbing carbon dioxide technology abroad. 2 The absorption process has good industrial application prospects, but there are not many studies on the absorption of carbon dioxide by mixed solutions containing ionic liquids. CN101700454 (2009) reported that an aqueous solution composed of alkaline ionic liquids and organic amines absorbs carbon dioxide, and the absorption pressure is 0.1 atm to 10atm, which limits the absorption pressure of carbon dioxide and has limited practicality

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: Add 40ml of mixed solution containing ionic liquid to piston magnetically stirred window reactor at 40°C, [EMIM] + [BF 4 ] - and [OMIM] + [Tf 2 N] - The mass fractions were 20% and 80%, respectively, and the vacuum was evacuated, and CO was introduced into the reactor using a single-cylinder syringe pump. 2 to 8.65Mpa for absorption, the rotation speed is 400r / min, and the pressure tends to balance after stirring for 2 hours, indicating that the ionic liquid mixed solution absorbs CO 2 Equilibrium has been reached, the stirring is turned off, and the liquid phase analysis is taken, the results show that when the equilibrium pressure is 1.12Mpa, the CO 2 The mole fraction in the ionic liquid mixed solution is 0.2001; when the equilibrium pressure is 3.41Mpa, CO 2 The mole fraction in the ionic liquid mixed solution is 0.5095; when the equilibrium pressure is 5.52Mpa, CO 2 The mole fraction in this ionic liquid mixed solution is 0.6831.

[0010] Change ...

Embodiment 2

[0012] Example 2: Add 40ml of mixed solution containing ionic liquid to piston magnetically stirred window reactor at 40°C, [BMIM] + [BF 4 ] - and [OMIM] + [Tf 2 N] - The mass fractions were 20% and 80%, respectively, and the vacuum was evacuated, and CO was introduced into the reactor using a single-cylinder syringe pump. 2 to 8.90Mpa for absorption, the rotation speed is 400r / min, and the pressure tends to balance after stirring for 2 hours, indicating that the ionic liquid mixed solution absorbs CO 2 Equilibrium has been reached, the stirring is turned off, and the liquid phase analysis is taken. The results show that when the equilibrium pressure is 1.13Mpa, the CO 2 The mole fraction in the ionic liquid mixed solution is 0.2200; when the equilibrium pressure is 3.32Mpa, CO 2 The mole fraction in the ionic liquid mixed solution is 0.5245; when the equilibrium pressure is 5.39Mpa, CO 2 The mole fraction in the ionic liquid mixed solution is 0.6931.

[0013] Change t...

Embodiment 3

[0015]Embodiment 3: Add 40ml of mixed solution containing ionic liquid to piston magnetically stirred window reactor at 60°C, [EMIM] + [BF 4 ] - and [OMIM] + [Tf 2 N] - The mass fractions were 20% and 80%, respectively, and the vacuum was evacuated, and CO was introduced into the reactor using a single-cylinder syringe pump. 2 to 7.32Mpa for absorption, the rotation speed is 400r / min, and the pressure tends to balance after stirring for 2 hours, indicating that the ionic liquid mixed solution absorbs CO 2 Equilibrium has been reached, the stirring is turned off, and the liquid phase analysis is taken. The results show that when the equilibrium pressure is 1.21Mpa, the CO 2 The mole fraction in the ionic liquid mixed solution is 0.1700; when the equilibrium pressure is 4.28Mpa, CO 2 The mole fraction in the ionic liquid mixed solution is 0.4562; when the equilibrium pressure is 5.32Mpa, CO 2 The mole fraction in the ionic liquid mixed solution is 0.5198.

[0016] Change...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for absorbing carbon dioxide by using mixed solution containing ionic liquid, belonging to the technical field of carbon dioxide treatment. The mixed solution is mixed solution of ionic liquid A and ionic liquid B, or mixed solution of ionic liquid A or ionic liquid B and organic solvent C, wherein cations in the ionic liquid A are N, N-dialkyl imidazole cations and anions in the ionic liquid A are tetrafluoroborate radical anions, hexafluorophosphate radical anions or chloride ions; cations in the ionic liquid B are N, N-dialkyl imidazole cations and anions in the ionic liquid B are trifluoromethyl sulfamide anions; and the organic solvent C is methanol or acetone. The method comprises the steps of adding mixed solution containing the ionic liquid into a reaction kettle, vacuum pumping, feeding in CO2, keeping absorbing temperature to be 10-80 DEG C, agitating for absorption, and keeping CO2 balance pressure to be 0.01-10Mpa. The method for absorbing carbon dioxide by using mixed solution containing ionic liquid has the advantages that the solubility and the selectivity are higher and the defects of high volatility and high toxicity caused by a reason that pure organic solvent is used can be overcome at the same time.

Description

technical field [0001] The invention relates to a method for absorbing carbon dioxide by using a mixed solution containing ionic liquid in the chemical industry, and belongs to the technical field of carbon dioxide treatment. Background technique [0002] The increase of greenhouse gases in the atmosphere is the direct cause of climate warming. Among them, a large amount of carbon dioxide produced by fossil fuels is the main source of the greenhouse effect. Therefore, in order to reduce various natural disasters and environmental pollution caused by the increase in carbon dioxide content, it is necessary to absorb and enrich carbon dioxide to become a safe, non-toxic, abundant C resources. Absorption of carbon dioxide is a common problem in the chemical industry. At present, carbon dioxide absorption methods include physical absorption method, membrane absorption method, air separation / exhaust circulation method, chemical absorption method, etc., each method has its own ch...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/62
CPCY02A50/20
Inventor 雷志刚韩敬莉代成娜张本凤乞晓曦陈标华
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com