CN105854524A - Absorbent for gathering carbon dioxide in exhaust gas - Google Patents

Absorbent for gathering carbon dioxide in exhaust gas Download PDF

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Publication number
CN105854524A
CN105854524A CN201610370732.9A CN201610370732A CN105854524A CN 105854524 A CN105854524 A CN 105854524A CN 201610370732 A CN201610370732 A CN 201610370732A CN 105854524 A CN105854524 A CN 105854524A
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CN
China
Prior art keywords
absorbent
carbon dioxide
fuel gas
collecting carbon
feature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610370732.9A
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Chinese (zh)
Inventor
汪志和
崔广才
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Yineng Kangsheng Environmental Protection Technology Co Ltd
Original Assignee
Sichuan Yineng Kangsheng Environmental Protection Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sichuan Yineng Kangsheng Environmental Protection Technology Co Ltd filed Critical Sichuan Yineng Kangsheng Environmental Protection Technology Co Ltd
Priority to CN201610370732.9A priority Critical patent/CN105854524A/en
Publication of CN105854524A publication Critical patent/CN105854524A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1475—Removing carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1425—Regeneration of liquid absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/204—Amines
    • B01D2252/20478—Alkanolamines
    • B01D2252/20484—Alkanolamines with one hydroxyl group
    • 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
    • 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

Abstract

The invention provides an absorbent for gathering carbon dioxide in exhaust gas. The absorbent comprises the following components by mass part: 20-50 parts of main component, 1-5 parts of activating agent, 0.1-1 part of antioxidant and the balance of water. The absorbent can absorb CO2 in the gas mixture under low temperature at 20-60 DEG C and can resolve the CO2 under high temperature at 85-120 DEG C; the CO2 by-product in the concentration more than or equal to 99% (dry basis) can be generated; the absorbent can be regenerated and recycled.

Description

A kind of absorbent for collecting carbon dioxide from fuel gas
Technical field
The present invention relates to environmental protection and chemical gases separation field, particularly relate to a kind of for trapping flue gas The compound amine solvent formula of middle carbon dioxide.
Background technology
At present, along with energy demand is continued to increase by the mankind, the fossil fuel such as great Liang Mei, oil is opened Adopt utilization, increasing CO2Being discharged in air, the air pollution thus caused and greenhouse effects are just The environment that the mankind depend on for existence in serious threat.Therefore, CO2Trapping, utilize and become complete with sealing up for safekeeping " focus " problem that ball is paid close attention to.
CO2Trapping technique include solvent absorption, absorption method, low temperature processing, membrane separation process etc.. Wherein, monoethanolamine (MEA) solvent absorption is the CO being most widely used2Capture method, but Reclaim CO2During, MEA is easily and O2、CO2And sulfide etc. occurs chemical degradation, the most easily there is heat drop Solve.MEA degradation problem is always MEA process and reclaims CO2The insoluble technical barrier existed.For These problems, abroad develop a series of amine resist technology, such as the gas/mark FT-1 skill of DOW chemical company Art and FS-1 solvent, to some extent solve the problem such as equipment corrosion and energy consumption height.
But nonetheless, MEA technique presently, there are that process energy consumption is high, equipment corrosion serious, absorbing liquid Rate of deterioration is fast, high volatility causes the problems such as absorbent loss.Therefore, significantly more efficient, ring is developed Border traps CO with open arms2Method and separate material be current problem demanding prompt solution.
Summary of the invention
Present invention aim to address that part is asked present in the absorption techniques of existing carbon dioxide in flue gas Topic, it is provided that a kind of serotonin absorbent for collecting carbon dioxide from fuel gas.This absorbent is by specific Hydroxyethyl diamine be main body, add a small amount of activator, antioxidant composition the aqueous solution.
It is an object of the invention to be achieved through the following technical solutions:
A kind of absorbent for collecting carbon dioxide from fuel gas, as follows including component and mass fraction:
Bulk composition: 20-50 part；Activator: 1-5 part；Antioxidant: 0.1-1 part.
Preferably, described bulk composition is hydroxyethyl diamine.
Preferably, described hydroxyethyl diamine is selected from N-hydroxyethyl piperazine, N-hydroxyethyl imidazole, N-hydroxyl second One or more in base ethylenediamine, N-ethoxy propane diamine, N-ethoxy hexamethylene diamine.
Preferably, described activator is secondary amine and alkyl alcoholamine.
Preferably, described secondary amine selected from piperazine, imidazoles, 2-methylimidazole one or more.
Preferably, described alkyl alcoholamine selected from diethanol amine (DEA), tert-butylamine base ethanol (TBE) or 2-amino-2-methyl-1-propanol (AMP).
Preferably, described antioxidant is hydroquinones, N, double (3-(3, the 5-di-t-butyl-4-hydroxyls of N- Base phenyl) propionyl) one or both in hexamethylene diamine.
Preferably, water is also comprised.
Preferably, the mass fraction of described water is 45-70 part.
Beneficial effects of the present invention: the present invention provide Regeneratable absorbent based on hydroxyethyl diamine, Add a small amount of activator and antioxidant, there is CO2Absorbability is big, energy consumption is low, arresting efficiency is high, The features such as solution degradation rate is low, preferably solve the shortcoming that existing trapping technique exists.
This absorbent absorbs the CO in gaseous mixture at low temperature 20-60 DEG C2Gas, high temperature 85-120 DEG C Lower parsed, produced the concentration CO more than 99% (butt)2Byproduct, absorbent obtains again Raw, recycle.
Accompanying drawing explanation
Fig. 1 is CO in the flue gas employed in embodiment2Trapping process chart.
Detailed description of the invention
In order to the present invention is better described, below in conjunction with the accompanying drawing in the embodiment of the present invention, real to the present invention The technical scheme executed in example is clearly and completely described.
Certain NGCC power plant, is intended to Combined cycle gas-steam turbine thermal power plant unit waste heat boiler tail flue gas construction A set of trapping system, there is no similar industrialized unit in view of the most domestic, determines to build a set of 5t/d CO2 Trapping experimental verification device, uses inventive formulation solvent and traditional MEA solvent to carry out contrast experiment, Use such as the technological process of accompanying drawing 1:
Boiler smoke initially enters water scrubber 1 dedusting cooling, is re-fed into absorption tower 2, the CO in flue gas2 Being absorbed by absorbent, exit gas is vented.Absorb CO2After rich solution entered lean by the bottom of tower through rich solution pump 3 Rich solution heat exchanger 4, enters regenerator 5 top after reclaiming heat.The CO desorbed2Together with steam through cold After condenser 9 cooling, it is separated off moisture through gas-liquid separator 10, obtains the product SO of purity 99.5%2 Gas, Song Xia workshop section uses.The condensed water separated that is condensed in regeneration gas is delivered to by reflux pump 11 again Raw tower 5 top.Rich solution enters from regenerator top, by stripping desorption part CO2, subsequently into again Boiling device 6 so that it is in CO2Desorption further.Desorption CO2After lean solution by regenerator 5 end flow out, warp After lean pump 7, poor rich liquid heat exchanger 4, enter top, absorption tower 2 through lean solution cooler 8.Absorbent Cyclic constitutes continuous absorption and desorption CO2Technical process.
The absorbent of the application consists of: N-hydroxyethyl piperazine 22% (weight), 2 one amino-2 one first Base-1-propyl alcohol (AMP)+piperazine 5% (weight), hydroquinones 0.1% (weight), remaining composition are water.
The MEA absorbent component of contrast is: monoethanolamine (MEA) 22% (weight), patent activator 5% (weight), patent antioxidant 0.1% (weight), remaining composition are water.
Contrast on effect is as shown in the table:
Comparing result shows, utilizes the absorbent of the application, under same solution internal circulating load, and CO2Trapping Rate is higher, and heat consumption reduces about 20%, and solvent consumption reduces about 90%, and energy conservation and consumption reduction effects is obvious. The absorbent that the present invention provides in use, uses low temperature absorption, thermal regeneration, simultaneously by-product high concentration CO2, can be as producing liquid CO2Deng the good raw material of product, reduce greenhouse gas emission.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not Being confined to this, any those familiar with the art, can in the technical scope of present disclosure The change readily occurred in or replacement, all should contain within protection scope of the present invention.Therefore, this Bright protection domain should be as the criterion with the protection domain of claims.

Claims (9)

1. the absorbent for collecting carbon dioxide from fuel gas, it is characterised in that include component and Mass fraction is as follows:
Bulk composition: 20-50 part；Activator: 1-5 part；Antioxidant: 0.1-1 part.
Absorbent for collecting carbon dioxide from fuel gas the most according to claim 1, its feature Being, described bulk composition is hydroxyethyl diamine.
Absorbent for collecting carbon dioxide from fuel gas the most according to claim 2, its feature Being, described hydroxyethyl diamine is selected from N-hydroxyethyl piperazine, N-hydroxyethyl imidazole, N-ethoxy second two One or more in amine, N-ethoxy propane diamine, N-ethoxy hexamethylene diamine.
Absorbent for collecting carbon dioxide from fuel gas the most according to claim 1, its feature Being, described activator is secondary amine and alkyl alcoholamine.
Absorbent for collecting carbon dioxide from fuel gas the most according to claim 4, its feature Be, described secondary amine selected from piperazine, imidazoles, 2-methylimidazole one or more.
Absorbent for collecting carbon dioxide from fuel gas the most according to claim 4, its feature Being, described alkyl alcoholamine is selected from diethanol amine, tert-butylamine base ethanol or 2-amino-2-methyl-1-third Alcohol.
Absorbent for collecting carbon dioxide from fuel gas the most according to claim 1, its feature Being, described antioxidant is hydroquinones, N, the double (3-(3,5-di-tert-butyl-hydroxy phenyl) of N- Propionyl) one or both in hexamethylene diamine.
8. according to the arbitrary described absorbent for collecting carbon dioxide from fuel gas of claim 1-7, It is characterized in that, also comprise water.
Absorbent for collecting carbon dioxide from fuel gas the most according to claim 8, its feature Being, the mass fraction of described water is 45-70 part.
CN201610370732.9A 2016-05-27 2016-05-27 Absorbent for gathering carbon dioxide in exhaust gas Pending CN105854524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
CN105854524A true CN105854524A (en) 2016-08-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731511A (en) * 2017-03-15 2017-05-31 四川益能康生环保科技有限公司 A kind of composite absorber for removing hydrogen sulfide in oxygen-containing waste gas
CN109012090A (en) * 2018-07-30 2018-12-18 大连理工大学 It is a kind of can oxidation resistant non-aqueous decarbonizing solution for trap carbon dioxide in gas mixture
CN111603894A (en) * 2020-05-29 2020-09-01 中国华电科工集团有限公司 CO based on eutectic solvent2Absorption liquid and preparation method and application thereof
CN115138178A (en) * 2022-07-07 2022-10-04 武汉工程大学 Polyamine-based organic amine and ionic liquid composite CO 2 Absorbent, preparation method and application thereof
CN116603369A (en) * 2023-04-28 2023-08-18 成都益志科技有限责任公司 Absorbent capable of efficiently absorbing sulfur dioxide

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JPS57135024A (en) * 1981-02-13 1982-08-20 Matsushita Electric Ind Co Ltd Apparatus for removing carbon dioxide and oxygen
CN101091864A (en) * 2007-05-15 2007-12-26 大连理工大学 Compound decarburization solution for recovering carbon dioxide in gas mixture
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WO2013079816A1 (en) * 2011-11-30 2013-06-06 IFP Energies Nouvelles Method for eliminating acid compounds from a gaseous effluent with an absorbent solution made from bis(amino-3-propyl)ethers or (amino-2-ethyl)-(amino-3-propyl)ethers

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CN101091864A (en) * 2007-05-15 2007-12-26 大连理工大学 Compound decarburization solution for recovering carbon dioxide in gas mixture
US20130055895A1 (en) * 2010-01-05 2013-03-07 Thyssenkrupp Uhde Gmbh Removal of co2 from gases of low co2 partial pressures by means of 1,2 diaminopropane
CN101920159A (en) * 2010-09-10 2010-12-22 北京金源化学集团有限公司 Method for removing and reclaiming sulfur dioxide from gas by low power consumption renewable absorbent
WO2013079816A1 (en) * 2011-11-30 2013-06-06 IFP Energies Nouvelles Method for eliminating acid compounds from a gaseous effluent with an absorbent solution made from bis(amino-3-propyl)ethers or (amino-2-ethyl)-(amino-3-propyl)ethers

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731511A (en) * 2017-03-15 2017-05-31 四川益能康生环保科技有限公司 A kind of composite absorber for removing hydrogen sulfide in oxygen-containing waste gas
CN106731511B (en) * 2017-03-15 2020-02-11 四川益能康生环保科技有限公司 Composite absorbent for removing hydrogen sulfide in oxygen-containing waste gas
CN109012090A (en) * 2018-07-30 2018-12-18 大连理工大学 It is a kind of can oxidation resistant non-aqueous decarbonizing solution for trap carbon dioxide in gas mixture
CN111603894A (en) * 2020-05-29 2020-09-01 中国华电科工集团有限公司 CO based on eutectic solvent2Absorption liquid and preparation method and application thereof
CN115138178A (en) * 2022-07-07 2022-10-04 武汉工程大学 Polyamine-based organic amine and ionic liquid composite CO 2 Absorbent, preparation method and application thereof
CN116603369A (en) * 2023-04-28 2023-08-18 成都益志科技有限责任公司 Absorbent capable of efficiently absorbing sulfur dioxide

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Application publication date: 20160817