CN102688742A - A carbon dioxide adsorbent preparation method - Google Patents
A carbon dioxide adsorbent preparation method Download PDFInfo
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- CN102688742A CN102688742A CN2012101602860A CN201210160286A CN102688742A CN 102688742 A CN102688742 A CN 102688742A CN 2012101602860 A CN2012101602860 A CN 2012101602860A CN 201210160286 A CN201210160286 A CN 201210160286A CN 102688742 A CN102688742 A CN 102688742A
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- carbon dioxide
- preparation
- hydrotalcite
- dioxide absorber
- particle
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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 carbon dioxide adsorbent preparation method belonging to the adsorbent preparation technology field. The preparation method comprises a step of mixing a hydrotalcite, a modification component and a binding agent, a moulding step and a calcining step to form particles with a certain shape and a certain mechanical strength. The method is characterized by simple technique and easy operation. The adsorbent made by employing the method has relatively strong selective absorption capacity over carbon dioxide at a certain temperature and under a certain pressure. The adsorbent can directly separate carbon dioxide from the air at an operating temperature of 200 to 450 DEG C with no need to cool the air in advance. Therefore energy loss is reduced and efficiency is improved. In addition, the adsorbent has advantages of high cycling stability and easy desorption.
Description
Technical field
The invention belongs to the adsorbent preparing technical field, be specifically related to a kind of preparation method of carbon dioxide absorber.
Technical background
The carbon dioxide of a large amount of dischargings can produce greenhouse effects and cause global warming in the commercial production, and climatic environment is exerted an adverse impact.The importance of carbon dioxide discharge-reduction and urgency are approved by most of people.In addition, the production link of many chemical industry and energy industry also need be isolated the carbon dioxide in the gaseous mixture.Therefore, seek a kind of low energy consumption cheaply the carbon dioxide separation technology have great significance.And the selection of adsorbent is a key wherein, and suitable adsorbent can be raised the efficiency, and reduces cost, cuts down the consumption of energy, to increase economic efficiency.
The adsorbent that is used for the normal temperature carbon dioxide separation at present has molecular sieve, activated carbon etc., and they have the big advantage of adsorbance.But their adsorbance raises along with temperature and reduces greatly, therefore if being used for the wet body separates, earlier gas is lowered the temperature with regard to needs, and this has just lost part energy, and has increased the complexity of technology.For addressing this problem, can select temperature absorption (receipts) agent in the carbon dioxide for use.And traditional middle high-temperature adsorbing agent such as calcium oxide, lithium zirconate etc., the adsorption reaction heat release is big, has increased the difficulty of follow-up desorb, makes us not satisfied.
Research shows that modified hydrotalcite derivative powder has stronger adsorption capacity to titanium dioxide; And suitable operating temperature higher (200 to 450 ℃); Can directly be used to separate the carbon dioxide that is in this temperature range, not need in advance gas to be lowered the temperature, thereby reduce the loss of energy.In addition, the good cycling stability of this adsorbent, desorb is easy.Need not carry out heating and cooling during desorb, only need to reduce partial pressure of carbon dioxide, just can discharge the carbon dioxide of absorption, and recover adsorption capacity, thereby reduce energy consumption.Therefore, this is a kind of adsorbent that has application prospect.
Summary of the invention
The purpose of this invention is to provide a kind of under 200 to 450 degrees centigrade of middle temperature, the preparation method of carbon dioxide absorber in absorption industrial waste gas or the synthesis gas.
A kind of preparation method of carbon dioxide absorber, its step is following:
(1) hydrotalcite, modified component and binding agent are milled to below particle diameter 100 orders, and dry down at 60 ℃ to 150 ℃;
(2) hydrotalcite was calcined 1 to 4 hour down at 150 ℃ to 600 ℃;
The weight ratio of (3) hydrotalcite and modified component being pressed 25:1 to 1:1 is mixed;
(4) mixture of hydrotalcite and modified component and binding agent weight ratio or the volume ratio by 25:1 to 1:1 mixed; Add 10% to 200% water of three's volume of mixture again, and to mix be wet group;
(5) using extrusion moulding or compression molding method will above-mentioned wet group to process diameter is 0.2 to 2 centimetre particle, in drying below 100 ℃;
(6) with above-mentioned particle 200 ℃-600 ℃ temperature lower calcination 1-10 hour.
The chemical structural formula of described hydrotalcite does
, M wherein
2+Be Mg
2+, Ni
2+, Zn
2+, Cu
2+Or Mn
2+; M
3+Be Al
3+, Fe
3+Or Cr
3+A
N-Be CO
3 2-, SO
4 2-, NO
3-, Cl
-Or OH
-X is 0.1 ~ 0.9.
Described modified component is one or more of carbonate or acetate of potassium, sodium, lithium or rubidium.
Described binding agent is one or more in methylcellulose, ethyl cellulose, sodium carboxymethylcellulose, aluminium colloidal sol, Ludox, kaolinite, the attapulgite clay.
Hydrotalcite with the modified component method of mixing is in the step (3): directly powder mixes or with infusion process with hydrotalcite and modified component mixing; The mixture that obtains with infusion process need be milled to the powder below 100 orders again.
Extrusion moulding in the step (5) is that the strip with certain cross sectional shape is processed through agent bar machine by wet group, is cut into the particle that is of convenient length again.
Compression molding method in the step (5) is that 14 order to 30 purpose granules are processed with wobbler earlier by wet group, is dried to moisture again less than 5%, is pressed into particle with tablet press machine.
Beneficial effect of the present invention is: preparation method's technology of the present invention is simple, easy and simple to handle; The adsorbent of the inventive method preparation is under uniform temperature and pressure; This particle has stronger selection adsorption capacity to carbon dioxide; Can be under 200-450 ℃ operating temperature, the direct separation carbon dioxide in air does not need in advance gas to be lowered the temperature; Thereby reduced the loss of energy, improved efficient.In addition, the good cycling stability of this adsorbent, desorb is easy.
The specific embodiment
To combine instance to further specify the present invention below.
Embodiment 1
At first commercially available hydrotalcite was calcined 3 hours down at 200 ℃.Take by weighing hydrotalcite after 10 kilograms of calcinings then, 3 kilograms of potash are milled to respectively below 200 orders, mix.0.6 kilogram of methylcellulose is dissolved in 10 premium on currency, and joins in the mixed-powder that obtains of step, fully stir and knead the group of wetting.Above-mentioned agglomerate is used the banded extruder extrusion molding, process 0.5 centimetre of particle diameter cylindrical particle, 80 degrees centigrade of down oven dry.Particle after the oven dry is put into Muffle furnace, calcined 3 hours down at 400 degrees centigrade; Be cooled to room temperature then, it is for use to put into airtight container.
Embodiment 2
At first commercially available hydrotalcite was calcined 3 hours down at 200 ℃; Take by weighing hydrotalcite after 10 kilograms of calcinings then, 1 kilogram of potash is milled to respectively below 200 orders.Above-mentioned 1 kilogram of potash is dissolved in 30 premium on currency, again with above-mentioned 10 kilograms of calcinings after hydrotalcite mix abundant dipping.The hydrotalcite of 10 liters of A-4 type acidic aluminum sols and above-mentioned dipping potassium percarbonate is fully mixed, knead agglomerating.Above-mentioned agglomerate is processed 20 orders to 24 purpose granules with wobbler, and under 80 ℃, be dried to water content below 5%.With dried granule, be pressed into the cylindrical particle of 0.5 centimetre of particle diameter with tablet press machine, and descend fully dry at 80 ℃.Particle after the oven dry is put into Muffle furnace, calcined 3 hours down at 400 degrees centigrade.Be cooled to room temperature, it is for use to put into airtight container.
Claims (7)
1. the preparation method of a carbon dioxide absorber is characterized in that, step is following:
(1) hydrotalcite, modified component and binding agent are milled to below particle diameter 100 orders, and dry down at 60 ℃ to 150 ℃;
(2) hydrotalcite was calcined 1 to 4 hour down at 150 ℃ to 600 ℃;
The weight ratio of (3) hydrotalcite and modified component being pressed 25:1 to 1:1 is mixed;
(4) mixture of hydrotalcite and modified component and binding agent weight ratio or the volume ratio by 25:1 to 1:1 mixed; Add 10% to 200% water of three's volume of mixture again, and to mix be wet group;
(5) using extrusion moulding or compression molding method will above-mentioned wet group to process diameter is 0.2 to 2 centimetre particle, in drying below 100 ℃;
(6) with above-mentioned particle 200 ℃-600 ℃ temperature lower calcination 1-10 hour.
2. the preparation method of a kind of carbon dioxide absorber according to claim 1 is characterized in that, the chemical structural formula of described hydrotalcite does
, M wherein
2+Be Mg
2+, Ni
2+, Zn
2+, Cu
2+Or Mn
2+; M
3+Be Al
3+, Fe
3+Or Cr
3+; A
N-Be CO
3 2-, SO
4 2-, NO
3-, Cl
-Or OH
-X is 0.1 ~ 0.9.
3. the preparation method of a kind of carbon dioxide absorber according to claim 1 is characterized in that, described modified component is one or more of carbonate or acetate of potassium, sodium, lithium or rubidium.
4. the preparation method of a kind of carbon dioxide absorber according to claim 1; It is characterized in that described binding agent is one or more in methylcellulose, ethyl cellulose, sodium carboxymethylcellulose, aluminium colloidal sol, Ludox, kaolinite, the attapulgite clay.
5. the preparation method of a kind of carbon dioxide absorber according to claim 1 is characterized in that, hydrotalcite with the modified component method of mixing is in the step (3): directly powder mixes or with infusion process with hydrotalcite and modified component mixing; The mixture that obtains with infusion process need be milled to the powder below 100 orders again.
6. the preparation method of a kind of carbon dioxide absorber according to claim 1 is characterized in that, the extrusion moulding in the step (5) is that the strip with certain cross sectional shape is processed through agent bar machine by wet group, is cut into the particle that is of convenient length again.
7. the preparation method of a kind of carbon dioxide absorber according to claim 5; It is characterized in that; Compression molding method in the step (5) is that 14 order to 30 purpose granules are processed with wobbler earlier by wet group, is dried to moisture again less than 5%, is pressed into particle with tablet press machine.
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| CN2012101602860A CN102688742A (en) | 2012-05-21 | 2012-05-21 | A carbon dioxide adsorbent preparation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785347A (en) * | 2012-10-30 | 2014-05-14 | 北京低碳清洁能源研究所 | Composite oxide adsorbent for adsorption of medium/high temperature CO2 |
| CN103933925A (en) * | 2014-04-11 | 2014-07-23 | 清华大学 | Difunctional adhesive and acid gas adsorbent precursor and applications thereof |
| CN107670632A (en) * | 2017-10-19 | 2018-02-09 | 北京化工大学 | A kind of medium temperature carbon dioxide absorber and its preparation and application |
| CN113842884A (en) * | 2021-11-26 | 2021-12-28 | 清华大学 | Medium-temperature hydrophobic decarbonization adsorbent and preparation method thereof |
| WO2024106415A1 (en) * | 2022-11-16 | 2024-05-23 | 栗田工業株式会社 | Method for manufacturing acidic gas adsorbent |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274211A (en) * | 2008-05-23 | 2008-10-01 | 北京三聚环保新材料股份有限公司 | High-temperature dechlorinating agent and preparing method thereof |
| WO2009004132A2 (en) * | 2007-05-15 | 2009-01-08 | Ifp | Process for deacidification of a natural gas using layered double hydroxides |
| CN101386424A (en) * | 2008-10-14 | 2009-03-18 | 中国海洋大学 | method for preparing modification forming magnalium hydrotalcite and application |
-
2012
- 2012-05-21 CN CN2012101602860A patent/CN102688742A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009004132A2 (en) * | 2007-05-15 | 2009-01-08 | Ifp | Process for deacidification of a natural gas using layered double hydroxides |
| CN101274211A (en) * | 2008-05-23 | 2008-10-01 | 北京三聚环保新材料股份有限公司 | High-temperature dechlorinating agent and preparing method thereof |
| CN101386424A (en) * | 2008-10-14 | 2009-03-18 | 中国海洋大学 | method for preparing modification forming magnalium hydrotalcite and application |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785347A (en) * | 2012-10-30 | 2014-05-14 | 北京低碳清洁能源研究所 | Composite oxide adsorbent for adsorption of medium/high temperature CO2 |
| CN103933925A (en) * | 2014-04-11 | 2014-07-23 | 清华大学 | Difunctional adhesive and acid gas adsorbent precursor and applications thereof |
| CN103933925B (en) * | 2014-04-11 | 2016-08-17 | 清华大学 | A kind of difunctional binding agent is held concurrently acid gas adsorption agent presoma and application thereof |
| CN107670632A (en) * | 2017-10-19 | 2018-02-09 | 北京化工大学 | A kind of medium temperature carbon dioxide absorber and its preparation and application |
| CN107670632B (en) * | 2017-10-19 | 2020-07-24 | 北京化工大学 | Medium-temperature carbon dioxide adsorbent and preparation and use methods thereof |
| CN113842884A (en) * | 2021-11-26 | 2021-12-28 | 清华大学 | Medium-temperature hydrophobic decarbonization adsorbent and preparation method thereof |
| WO2024106415A1 (en) * | 2022-11-16 | 2024-05-23 | 栗田工業株式会社 | Method for manufacturing acidic gas adsorbent |
| JP7529001B2 (en) | 2022-11-16 | 2024-08-06 | 栗田工業株式会社 | Method for producing acid gas adsorbent |
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Application publication date: 20120926 |