CN103566731B - A kind of continuous absorption and the method separating carbon dioxide - Google Patents
A kind of continuous absorption and the method separating carbon dioxide Download PDFInfo
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- CN103566731B CN103566731B CN201210258431.9A CN201210258431A CN103566731B CN 103566731 B CN103566731 B CN 103566731B CN 201210258431 A CN201210258431 A CN 201210258431A CN 103566731 B CN103566731 B CN 103566731B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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Abstract
The invention discloses a kind of continuous absorption and the method separating carbon dioxide, it is characterized in that, alcamine compound and liquid alcohol compounds mix according to mass ratio 0.005～0.2:1, pour carbon-dioxide absorbent bulk solution into, one layer 2～organic liquid film of 10 mm of thickness is formed on bulk solution surface, under uniform temperature and pressure, gas phase to be absorbed continues through liquid film with certain flow velocity, solution is left with crystal form after carbon dioxide absorption is saturated, remove crystal, backflow and supplementary absorbent bulk solution, realize continuous absorption and the separation of carbon dioxide.The method can continuous absorption and separate carbon dioxide efficiently, and realize the recycling of carbon dioxide.<!--1-->
Description
Technical field
The present invention relates to absorption and the Application way of a kind of gas, particularly relate to the absorption and separation of a kind of carbon dioxide and the method for utilization.
Background technology
Development along with human industry's civilization, the particularly substantial amounts of use of Fossil fuel, in making to produce and live, discharge amount of exhaust gas is increasing, the total carbon dioxide capacity that the whole world is discharged every year in air at present reaches nearly 30,000,000,000 tons, substantial amounts of CO2 emission to air, in cause the trend of global warming.Various countries and tissue all successively take limit row's greenhouse gases measure, and gradually start to enforce.Carbon dioxide has concurrently and pollutes and the duality of resource, can apply to multiple field such as food processing, agricultural production.Therefore absorb with realizing high-efficiency carbon dioxide and be used or be stored up, being that suppression greenhouse effect develops further, and then affect the effective way of environment for human survival and sustainable development.
The separation and recovery technology of carbon dioxide is broadly divided into absorption process (Physical Absorption method and chemical absorption method), physisorphtion, low temperature processing and membrane separation process etc. at present.Wherein the technique such as physisorphtion, low temperature processing and membrane separation process is relatively costly, and operation complexity, the application in engineering is less.Relatively common is absorption process, and what wherein technology was more ripe is chemical absorption method, is to utilize CO2With the chemical reaction between adsorption liquid is by CO2The method of separation and recovery from aerofluxus.Typical chemical absorbent has an ethanol ammonia (MEA), diethanolamine (DEA) and methyl diethanolamine (MDEA) etc..The feature of chemical absorption method is that infiltration rate is very fast, but it is big to there is also solvent-oil ratio, and desorbing difficulty is big to equipment corrosion, affects equipment life, it is impossible to the shortcoming realizing continuous absorption.And physisorphtion utilizes water, methanol, inorganic salt solution etc. as absorbent, can carry out under cryogenic high pressure, absorbability is big, and the amount of absorbing is few, and absorbent regeneration need not heating, little to equipment corrosion, but is also only applicable to CO2The condition that partial pressure is higher, and CO2Clearance relatively low.Therefore combining the feature of physics absorption process and chemical absorption method, exploitation new type of continuous absorbs and the technique of separation carbon dioxide has important more practical value.
In sum, it is desirable to provide a kind of efficient carbon dioxide continuous absorption and the method for separation, to realize the continuous absorption of carbon dioxide and to recycle.
Summary of the invention
The present invention is directed to deficiencies of the prior art, it is provided that a kind of continuous absorption and the method separating carbon dioxide, the absorption rate of the method carbon dioxide is fast, and solvent-oil ratio is little, little to equipment corrosion, and method for absorbing and separating is simple simultaneously, facilitate penetration and promotion.
In order to realize foregoing invention purpose, the invention provides a kind of continuous absorption and the method separating carbon dioxide, concrete steps include: after alcohols organic liquid mixes with alcamines carrier, cover on the surface of carbon-dioxide absorbent bulk solution, form one layer of organic liquid film strengthening absorbing carbon dioxide with carrier, gas phase to be absorbed continues through the surface of absorbent bulk solution, and be fully contacted with the liquid film of solution surface, carbon dioxide is passed to absorbent bulk solution by liquid film, after bulk solution absorption is saturated, form carbonate or bicarbonate crystal, remove reflux solution while crystal, and supplementary fresh solution, realize continuous absorption and the separation of carbon dioxide.
The present invention provides a kind of continuous absorption and the method separating carbon dioxide, it is characterized in that, alcamine compound and liquid alcohol compounds mix according to mass ratio 0.005～0.2:1, pour carbon-dioxide absorbent bulk solution into, one layer 2～organic liquid film of 10 mm of thickness is formed on bulk solution surface, under uniform temperature and pressure, gas phase to be absorbed continues through liquid film with certain flow velocity, solution is left with crystal form after carbon dioxide absorption is saturated, remove crystal, backflow and supplementary absorbent bulk solution, it is achieved the continuous absorption of carbon dioxide and separation.
The described alcohol compound as liquid film is the one in butanol, isooctanol or a combination thereof.
The described alcamine compound as carrier is the one in monoethanolamine, diethanolamine, diisopropanolamine (DIPA), methyl diethanolamine or a combination thereof.
Described absorbent bulk solution is sodium carbonate (Na2CO3), or calcium chloride (CaCl2) saturated solution.
Described operation pressure is for being not less than 5kPa, and operation temperature is 283K～353K, and carbon dioxide flow rate is 0.5L/hr～10L/hr.
According to operating condition and equipment situation, can suitably adjust pressure and flow velocity, in order to preferably absorbing carbon dioxide.
The method that the present invention provides, in conjunction with physics absorption process and the feature of chemical absorption method, at one layer of alcohol compound of the surface of carbon-dioxide absorbent bulk solution covering as liquid film, and adds the alcamine compound absorption as carrier strengthening carbon dioxide in liquid film.Due to the facilitation of carrier, contribute to forming high-caliber chemical potential mutually at liquid film, thus accelerate the absorption to carbon dioxide.Alcamine compound as carrier can react with carbon dioxide, gas-liquid interface is formed complex, and diffuse to rapidly liquid-liquid interface, on liquid-liquid interface, complex decomposes rapidly, the carbon dioxide absorbed passes to carbon-dioxide absorbent bulk solution, and carrier carrier under the driving of concentration returns gas-liquid interface and absorbs, carbon-dioxide absorbent bulk solution is formed bottom carbonate crystal deposition vessel after carbon dioxide absorption is saturated, removes make-up solution while crystal.Liquid film and carrier act on jointly in the method, improve the absorption efficiency of carbon dioxide, and carbon dioxide is settlement separate with crystal form, it is not necessary to thermal regeneration, and energy consumption is low, and the corrosion to equipment is little.The method can continuous absorption and separate carbon dioxide efficiently, and realize the recycling of carbon dioxide.
Detailed description of the invention
Below embodiments of the invention are elaborated: the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1:
First weighing butanol that weight ratio is 95:5 and diethanolamine directly mixes, prepare the liquid film of complex carrier, wherein butanol, the percetage by weight of diethanolamine are respectively as follows: 95%, and 5%, this organic facies is imported saturated calcium chloride solution surface, forms 5mm thickness liquid film.Then it is 298K in temperature, under conditions of pressure carbon dioxide is 10kPa, makes carbon dioxide continue through the absorbent bulk solution being coated with carrier strengthening liquid film with the speed of 2L/hr, and be fully contacted with the liquid film of solution surface.
Obtain the average absorption ratio of carbon dioxide after testing more than 90%.
Embodiment 2:
First weighing butanol that weight ratio is 98:2 and triethanolamine directly mixes, prepare the liquid film of complex carrier, wherein butanol, the percetage by weight of diethanolamine are respectively as follows: 98%, and 2%, this organic facies is imported saturated calcium chloride solution surface, forms 5mm thickness liquid film.Then it is 298K in temperature, under conditions of pressure carbon dioxide is 10kPa, makes carbon dioxide continue through the absorbent bulk solution being coated with carrier strengthening liquid film with the speed of 3L/hr, and be fully contacted with the liquid film of solution surface.
Obtain the average absorption ratio of carbon dioxide after testing more than 90%.
Embodiment 3:
First weigh isooctanol that weight ratio is 95:5 and diisopropanolamine (DIPA) directly mixes, preparing the liquid film of complex carrier, wherein isooctanol, the percetage by weight of diisopropanolamine (DIPA) are respectively as follows: 98%, and 2%, this organic facies is imported saturated sodium carbonate solution surface, forms 5mm thickness liquid film.Then it is 298K in temperature, under conditions of pressure carbon dioxide is 10kPa, makes carbon dioxide continue through the absorbent bulk solution being coated with carrier strengthening liquid film with the speed of 3L/hr, and be fully contacted with the liquid film of solution surface.
Obtain the average absorption ratio of carbon dioxide after testing more than 90%.
Embodiment 4:
First weigh isooctanol that weight ratio is 95:5 and methyl diethanolamine directly mixes, preparing the liquid film of complex carrier, wherein isooctanol, the percetage by weight of methyl diethanolamine are respectively as follows: 98%, and 2%, this organic facies is imported saturated calcium chloride solution surface, forms 5mm thickness liquid film.Then it is 298K in temperature, under conditions of pressure carbon dioxide is 10kPa, makes carbon dioxide continue through the absorbent bulk solution being coated with carrier strengthening liquid film with the speed of 3L/hr, and be fully contacted with the liquid film of solution surface.
Obtain the average absorption ratio of carbon dioxide after testing more than 90%.
Embodiment 5:
First weigh isooctanol that weight ratio is 98:2 and diisopropanolamine (DIPA) directly mixes, preparing the liquid film of complex carrier, wherein isooctanol, the percetage by weight of diisopropanolamine (DIPA) are respectively as follows: 98%, and 2%, this organic facies is imported saturated sodium carbonate solution surface, forms 3mm thickness liquid film.Then it is 298K in temperature, under conditions of pressure carbon dioxide is 10kPa, makes carbon dioxide continue through the absorbent bulk solution being coated with carrier strengthening liquid film with the speed of 2L/hr, and be fully contacted with the liquid film of solution surface.
Obtain the average absorption ratio of carbon dioxide after testing more than 90%.
Claims (1)
1. a continuous absorption and the method for separation carbon dioxide, it is characterized in that, alcamine compound and liquid alcohol compounds mix according to mass ratio 0.005～0.2:1, pour carbon-dioxide absorbent bulk solution into, one layer 2～organic liquid film of 10 mm of thickness is formed on bulk solution surface, under uniform temperature and pressure, gas phase to be absorbed continues through liquid film with certain flow velocity, solution is left with crystal form after carbon dioxide absorption is saturated, remove crystal, backflow and supplementary absorbent bulk solution, it is achieved the continuous absorption of carbon dioxide and separation；
Described alcohol compound is the one in butanol, isooctanol or a combination thereof；
Described alcamine compound is the one in monoethanolamine, diethanolamine, diisopropanolamine (DIPA), methyl diethanolamine or a combination thereof；
Described absorbent bulk solution is sodium carbonate (Na2CO3), or calcium chloride (CaCl2) saturated solution；
Described operation pressure is for being not less than 5kPa, and operation temperature is 283K～353K, and carbon dioxide flow rate is 0.5L/hr～10L/hr.
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| CN201210258431.9A CN103566731B (en) | 2012-07-24 | 2012-07-24 | A kind of continuous absorption and the method separating carbon dioxide |
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| CN201210258431.9A CN103566731B (en) | 2012-07-24 | 2012-07-24 | A kind of continuous absorption and the method separating carbon dioxide |
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| CN103566731B true CN103566731B (en) | 2016-08-03 |
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| CN104190236B (en) * | 2014-08-27 | 2016-09-07 | 浙江大学 | The carbon dioxide capture of a kind of bionical thing calcification and method for releasing and special solution thereof |
| CN110947288B (en) * | 2020-01-17 | 2021-09-28 | 南京大学 | Preparation method of composite decarbonizing liquid suitable for low-pressure and low-heat working conditions |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004023784A1 (en) * | 2004-02-19 | 2006-03-02 | Faber, Matthias, Dipl.-Ing. | Scrubbing solution for oxidatively decomposing dioxin impurities, containing perchloric acid, hydrogen peroxide, potassium permanganate, methanol or ethanol and sodium hydroxide solution |
| CN102170955A (en) * | 2008-07-31 | 2011-08-31 | 诺维信公司 | Modular reactor and process for carbon dioxide extraction |
| CN102186559A (en) * | 2008-10-13 | 2011-09-14 | 胡亮 | Methods and systems for deacidizing gaseous mixtures |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004023784A1 (en) * | 2004-02-19 | 2006-03-02 | Faber, Matthias, Dipl.-Ing. | Scrubbing solution for oxidatively decomposing dioxin impurities, containing perchloric acid, hydrogen peroxide, potassium permanganate, methanol or ethanol and sodium hydroxide solution |
| CN102170955A (en) * | 2008-07-31 | 2011-08-31 | 诺维信公司 | Modular reactor and process for carbon dioxide extraction |
| CN102186559A (en) * | 2008-10-13 | 2011-09-14 | 胡亮 | Methods and systems for deacidizing gaseous mixtures |
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