CN102899095A - High-performance decarburization compound solvent for coke oven gas or natural gas, and preparation method thereof - Google Patents
High-performance decarburization compound solvent for coke oven gas or natural gas, and preparation method thereof Download PDFInfo
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- CN102899095A CN102899095A CN2012103124933A CN201210312493A CN102899095A CN 102899095 A CN102899095 A CN 102899095A CN 2012103124933 A CN2012103124933 A CN 2012103124933A CN 201210312493 A CN201210312493 A CN 201210312493A CN 102899095 A CN102899095 A CN 102899095A
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Abstract
The invention provides a high-performance decarburization compound solvent for coke oven gas or natural gas, and a preparation method thereof. The invention relates to a high-performance decarburization compound solvent composed of N-methyldiethanolamine, an activating agent, ionic liquid, and a defoaming agent. The content of the N-methyldiethanolamine in the decarburization compound solvent is 35-40wt%, the content of the defoaming agent is 0.1-0.5wt%, the content of piperazine or a mixture of piperazine and monoethanolamine in the activating agent is 1-3%, and the content of the ionic liquid is 1-2%. The high-performance decarburization compound solvent provided by the invention can be used for removing carbon dioxide from industrial gases such as coke oven gas or natural gas. After decarburization, carbon dioxide content is lower than 10ppm. The decarburization solvent provided by the invention has the advantages of high purification degree, high absorption capacity, low regeneration energy consumption, and the like.
Description
Technical field
The present invention relates to industrial gas decarbonization technical field, especially a kind of high-performance decarburization complex solvent and preparation method thereof.
Background technology
All want carbon dioxide removal in coke-oven gas, natural gas liquids treating processes, the carbonic acid gas itself after purifying in addition also is a kind of important industrial chemicals.Because the reinforcement of environmental consciousness, CO2 removes and captures and studies countries in the world environmental pollution is extremely paid attention to.The capital of a country meeting has had strict requirement to the quantity discharged of each national carbonic acid gas, therefore selects removing of economical and efficient to reclaim the significant of carbonic acid gas.Nineteen eighty-two, Germany BASF AG developed after the Activated MDEA Decarbonizing Technology, because large, the speed of response of receptivity is fast, wide accommodation, the regeneration energy consumption is low, degree of purification is high,, the advantage such as simplified control, this technology has been widely used in the carbon rejection process of industrial gasses.
Chinese patent (ZL93110579.X) discloses a kind of polyamine process decarbonizing solution, this decarbonizing solution is take the MDEA aqueous solution as main body, add piperazine (1% ~ 5%) and diethanolamine (1% ~ 10%) as activator, this technique is very ripe at present, is widely used in the fields such as decarbonization process of plant catalytic dry gas.
Chinese patent (CN101260330A) discloses the multiple amine aqueous solution of acid gas removal body in the high methane gas, this solution group activator is 2-amino-2-methyl-1-propanol (3% ~ 6%) and monoethanolamine (1% ~ 5%), all the other are MDEA solution, and this technique is widely applied in the carbon dioxide removal technique of natural gas liquefaction in recent years.
Ionic liquid be by specific positive and negative ion consist of in room temperature or be bordering on the material that is in a liquid state under the room temperature, be a kind of novel solvent.Carbonic acid gas can interact with ionic liquid, increases the solubleness of carbonic acid gas in some solvents.The research that utilizes in recent years ionic liquid to collect and catch carbonic acid gas receives much concern.
Activator in the composite decarbonization solvent of high-performance adopts and adds the lower concentration ionic liquid, away from corrosion region.Add in addition ionic liquid and find that it not only can improve absorption rate and also can reduce simultaneously solution liquid phase surface C O
2Dividing potential drop, thus be conducive to CO
2Absorption.
In sum, though existing MDEA decarbonizing solution differs from one another, its decarburization degree of purification, solvent loss and system energy consumption etc. still leave some room for improvement.
The invention technology contents
The technical problem to be solved in the present invention: a kind of high performance N methyldiethanol amine composite decarbonizing solution is provided, overcomes the deficiency that existing decarbonization solvent exists.
The technical scheme of technical solution problem of the present invention: the high-performance decarbonization solvent contains N methyldiethanol amine among the present invention, also comprise activator, ionic liquid and defoamer, wherein the content of N methyldiethanol amine in this high-performance decarbonizing solution is 35 ~ 40wt%, activator piperazine or piperazine and the content of monoethanolamine mixture in described decarbonizing solution are 1 ~ 3wt%, the content of 1-(3-Propylamino)-3-butyl imidazole a tetrafluoro borate or 1-(1-aminopropyl)-3-Methylimidazole bromine salt ion liquid is 1 ~ 2wt%, and defoamer is that polymethyl siloxane is 0.1 ~ 0.5wt%.
The said decarbonizing solution of the present invention can be used for removing of the carbon dioxide in gas mixtures such as coke-oven gas or Sweet natural gas, also has simultaneously the effect that removes hydrogen sulfide.This high-performance decarbonizing solution has the degree of purification height, absorptive capacity is large, absorption rate is fast, the regeneration low power consumption and other advantages.
Embodiment:
The present invention is further described below by embodiment, its objective is to be better understanding content of the present invention:
Embodiment 1
At certain 5Nm
3/ h(coke-oven gas) decarbonization device is selected MDEA decarbonizing solution of the present invention (MDEA concentration is 35wt%; Activator piperazine and monoethanolamine total concn are 1wt%; Ionic liquid 1-(3-Propylamino)-3-butyl imidazole a tetrafluoro borate or 1-(1-aminopropyl)-3-Methylimidazole bromine salt concn is 1wt%; Defoamer is that polymethyl siloxane concentration is 0.1wt%) carry out decarburization.40 ℃ of decarbonization system working pressure 2.6MPa, temperature, after the decarburization in the coke-oven gas content of carbonic acid gas less than 10ppm, every cubic metre of solvent absorbing carbonic acid gas 22 ~ 25Nm
3System's service data is as follows: MDEA consumes 0.087kg/NKm
3Coke-oven gas; Piperazine and monoethanolamine wastage in bulk or weight 0.009kg/NKm
3Coke-oven gas; 1-(3-Propylamino)-3-butyl imidazole a tetrafluoro borate or 1-(1-aminopropyl)-3-Methylimidazole bromine salt consumes 0.001kg/NKm
3Coke-oven gas; The defoamer polymethyl siloxane consumes 0.001kg/NKm
3Coke-oven gas; Steam consumption is less than 1000kg/NKm
3Coke-oven gas.
Embodiment 2
At certain 3Nm
3/ h(natural gas liquids) decarbonization device selects this to illustrate that (MDEA concentration is 38wt% to said MDEA decarbonizing solution; Activator piperazine and monoethanolamine total concn are 1.5wt%; Ionic liquid 1-(3-Propylamino)-3-butyl imidazole a tetrafluoro borate or 1-(1-aminopropyl)-3-Methylimidazole bromine salt concn 1.5wt%; Defoamer is that polymethyl siloxane concentration is 0.2wt%) carry out decarburization.Decarbonization system working pressure 3.0MPa, temperature 45 C, production system is stable after going into operation, and absorptive capacity is large, and carbon dioxide content is 8ppm in the natural gas liquids after the decarburization, every cubic metre of solution absorption carbonic acid gas 22 ~ 25Nm
3System's service data is as follows: MDEA consumes 0.089kg/NKm
3Natural gas liquids; Piperazine and 0.010 kilogram/NKm of monoethanolamine wastage in bulk or weight
3Natural gas liquids; 1-(3-Propylamino)-3-butyl imidazole a tetrafluoro borate or 1-(1-aminopropyl)-3-Methylimidazole bromine salt consumes 0.0015kg/NKm
3Natural gas liquids; The defoamer polymethyl siloxane consumes 0.003kg/NKm
3Natural gas liquids; Steam consumption is less than 1000kg/NKm
3Natural gas liquids.
Embodiment 3
At certain 5Nm
3/ h(natural gas liquids) decarbonization device selects this to illustrate that (MDEA concentration is 40wt% to said MDEA decarbonizing solution; Activator piperazine and monoethanolamine total concn are 3wt%; Ionic liquid 1-(3-Propylamino)-3-butyl imidazole a tetrafluoro borate or 1-(1-aminopropyl)-3-Methylimidazole bromine salt concn 2wt%; Defoamer is that polymethyl siloxane concentration is 0.5wt%) carry out decarburization.Decarbonization system working pressure 3.5MPa, temperature 50 C, production system is stable after going into operation, and absorptive capacity is large, and carbon dioxide content is 7ppm in the natural gas liquids after the decarburization, every cubic metre of solution absorption carbonic acid gas 22 ~ 25Nm
3System's service data is as follows: MDEA consumes 0.099kg/NKm
3Natural gas liquids; Piperazine and monoethanolamine wastage in bulk or weight 0.0027kg/NKm
3LNG; 1-(3-Propylamino)-3-butyl imidazole a tetrafluoro borate or 1-(1-aminopropyl)-3-Methylimidazole bromine salt consumes 0.005kg/NKm
3Natural gas liquids; Defoamer is that polymethyl siloxane consumes 0.005kg/NKm
3Natural gas liquids; Steam consumption is less than 1000kg/NKm
3Natural gas liquids.
Claims (3)
1. high-performance decarburization combination solution, it is comprised of N methyldiethanol amine, activator, ionic liquid and defoamer; Wherein N methyldiethanol amine content in described decarburization combination solution is 35 ~ 40wt%, the content of defoamer in the decarburization combination solution is 0.1 ~ 0.5wt%, the content of activator in the decarburization combination solution is 1 ~ 3%, and the content of ionic liquid in the decarburization combination solution is 1 ~ 2%.
2. high-performance decarburization combination solution according to claim 1, activator in the high-performance decarbonization solvent is by piperazine or piperazine and monoethanolamine compositions of mixtures, and described ionic liquid is 1-(3-Propylamino)-3-butyl imidazole a tetrafluoro borate or 1-(1-aminopropyl)-3-Methylimidazole bromine salt.
3. high-performance decarburization combination solution according to claim 1, the defoamer in the high-performance decarbonization solvent is polymethyl siloxane.
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| CN2012103124933A CN102899095A (en) | 2012-08-29 | 2012-08-29 | High-performance decarburization compound solvent for coke oven gas or natural gas, and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170216A (en) * | 2013-03-13 | 2013-06-26 | 上海锅炉厂有限公司 | Alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide |
| CN104031708A (en) * | 2013-03-06 | 2014-09-10 | 中国石油天然气股份有限公司 | Ionic liquid formula solution for desulfurization of natural gas with high sulfur content |
| CN104474846A (en) * | 2014-09-01 | 2015-04-01 | 常州大学 | Desulfurizer for removing H2S in natural gas and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074040C (en) * | 1996-08-28 | 2001-10-31 | 三菱重工业株式会社 | Process for removal and high-pressure recovery of carbon dioxide from high-pressure raw gas and system therefor |
| CN101264412A (en) * | 2008-04-30 | 2008-09-17 | 王胜利 | Decarburization solvent and preparation thereof |
| CN101700454A (en) * | 2009-11-25 | 2010-05-05 | 南京大学 | Green carbon dioxide absorbent |
-
2012
- 2012-08-29 CN CN2012103124933A patent/CN102899095A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074040C (en) * | 1996-08-28 | 2001-10-31 | 三菱重工业株式会社 | Process for removal and high-pressure recovery of carbon dioxide from high-pressure raw gas and system therefor |
| CN101264412A (en) * | 2008-04-30 | 2008-09-17 | 王胜利 | Decarburization solvent and preparation thereof |
| CN101700454A (en) * | 2009-11-25 | 2010-05-05 | 南京大学 | Green carbon dioxide absorbent |
Non-Patent Citations (1)
| Title |
|---|
| 严芳: "MDEA脱碳腐蚀原因浅析", 《化工设计通讯》, vol. 38, no. 3, 30 June 2012 (2012-06-30), pages 21 - 23 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104031708A (en) * | 2013-03-06 | 2014-09-10 | 中国石油天然气股份有限公司 | Ionic liquid formula solution for desulfurization of natural gas with high sulfur content |
| CN103170216A (en) * | 2013-03-13 | 2013-06-26 | 上海锅炉厂有限公司 | Alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide |
| CN104474846A (en) * | 2014-09-01 | 2015-04-01 | 常州大学 | Desulfurizer for removing H2S in natural gas and preparation method thereof |
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