CN103191704B - Composite adsorbent and preparation method thereof - Google Patents
Composite adsorbent and preparation method thereof Download PDFInfo
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- CN103191704B CN103191704B CN201310134776.8A CN201310134776A CN103191704B CN 103191704 B CN103191704 B CN 103191704B CN 201310134776 A CN201310134776 A CN 201310134776A CN 103191704 B CN103191704 B CN 103191704B
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- expanded graphite
- adsorbent
- calcium chloride
- polyethylene glycol
- glycol oxide
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Abstract
The invention discloses a composite adsorbent and a preparation method thereof. The composite adsorbent comprises calcium chloride, expanded graphite and polyethylene oxide. According to the composite adsorbent and the preparation method thereof, the heat and mass transfer ability of the adsorbent is improved to prevent the agglomeration of the adsorbent through the mixing of the expanded graphite and the calcium chloride, and meanwhile, the phenomena of loosening, layering, falling off and the like of the adsorbent are avoided through the addition of the polyethylene oxide, and therefore the mechanical performance of the adsorbent is improved; the method for preparing the composite adsorbent provided by the invention is simple and feasible, and is conveniently popularized.
Description
Technical field
The present invention relates to absorption type refrigerating field, particularly a kind of compound adsorbent.
Background technology
Absorption type refrigerating, as a kind of green refrigeration technology driven with the renewable sources of energy or low-grade heat source, is more and more subject to people's attention.Compared with traditional absorption refrigeration, absorption type refrigerating not only reduces power consumption, also avoid the absorption refrigeration problem such as systematic working medium crystallization and High Temperature Hot-corrosion Behaviorof at work, simultaneously more friendly to environment.
But at present absorption type refrigerating still has very large application difficult, is mainly that adsorbent also exists many defects, as easily lumpd, hot mass transfer poor performance and mechanical performance poor etc.Chinese patent CN1613551 discloses a kind of calcium-expanding black lead mixed adsorbent, is mixed by expanded graphite in that patent with calcium chloride water, is pressed into block mixed adsorbent after oven dry, solves the problem of adsorbent caking.China Patent No. CN101249420 discloses a kind of preparation method of expanded graphite-chlorides composite adsorbing agent, in that patent by expanded graphite briquet, again block expanded graphite be impregnated in calcium chloride water, enhance the heat and mass transfer performance of adsorbent by the graphite skeleton structure in block expanded graphite, it also avoid the caking of adsorbent simultaneously.But the mechanical performance of above-mentioned two kinds of adsorbents or poor, after the adsorption/desorption in several cycle uses, block adsorbent will loose or layering or peel off, and has had a strong impact on reusing of adsorbent.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of prevented from caking, and hot mass transfer performance is excellent, and good mechanical property, and reusing still can the compound adsorbent keeping skeleton structure and preparation method thereof.
For solving the problems of the technologies described above, the invention provides a kind of compound adsorbent, it comprises:
Calcium chloride, expanded graphite and polyethylene glycol oxide.
Preferably, the mass percent of described calcium chloride is 20% ~ 50%, and the mass percent of described expanded graphite is 30% ~ 40%, and the mass percent of described polyethylene glycol oxide is 20% ~ 40%.
Preferably, the molecular weight of described polyethylene glycol oxide is 4 × 10
6~ 8 × 10
6.
Present invention also offers a kind of method preparing compound adsorbent described in above-mentioned any one, it comprises the steps:
(1) calcium chloride and polyethylene glycol oxide are dissolved, obtain precursor liquid;
(2) add expanded graphite in the precursor liquid obtained in step (1), obtain mixed liquor;
(3) step (2) is obtained mixed liquor be dried to powder after compressing, namely obtain compound adsorbent.
Preferably, the described expanded graphite in step (2) is incubated 8min ~ 12min by expansible graphite and obtains at 500 DEG C ~ 700 DEG C.
More preferably, the particle diameter of described expansible graphite is 50 order ~ 80 orders.
Preferably, precursor liquid described in Keep agitation when adding expanded graphite in step (2).
Preferably, dry described in step (3) temperature is 90 DEG C ~ 100 DEG C.
Preferably, compressing described in step (3) pressure is 14MPa ~ 20MPa.
The present invention is mixed by expanded graphite and calcium chloride, improve the heat and mass ability of adsorbent, prevent the caking of adsorbent, adding simultaneously by polyethylene glycol oxide, avoid that loose, layering occurs adsorbent, the phenomenon such as come off, and improves the mechanical performance of adsorbent.The compound adsorbent preparation method that the present invention proposes is simple, is convenient to promote.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of compound adsorbent preparation method of the present invention.
Detailed description of the invention
For enabling above-mentioned purpose, the feature and advantage of invention more become apparent, below the specific embodiment of the present invention is described in detail.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
The thermal conductivity factor that expanded graphite in compound adsorbent provided by the invention can strengthen adsorbent avoids calcium chloride to lump simultaneously, adding polyethylene glycol oxide then can by the mechanical performance of the effect reinforcing material between the molecule of HMW, polyethylene glycol oxide is hydroaropic substance simultaneously, and it can not block the absorption/desorption of adsorbent to water.
In compound adsorbent provided by the invention, the ratio of each component is not particularly limited, preferably can be as follows: the mass percent of calcium chloride is 20% ~ 50%, and the mass percent of expanded graphite is 30% ~ 40%, and the mass percent of polyethylene glycol oxide is 20% ~ 40%.Further, the molecular weight of polyethylene glycol oxide can be preferably 4 × 10
6~ 8 × 10
6.
Correspondingly, present invention also offers a kind of preparation method of above-mentioned compound adsorbent, comprise the following steps:
The first step: calcium chloride and polyethylene glycol oxide are dissolved, obtains precursor liquid.The dissolving method of the present invention to described calcium chloride and polyethylene glycol oxide is not particularly limited, method well known to those skilled in the art can be adopted, as first dissolved calcium chloride, add polyethylene glycol oxide again, or simultaneously in water, add calcium chloride and dissolve together with polyethylene glycol oxide, and in order to make dissolving more quick, also can be stirred when dissolving or be heated.
Second step: add expanded graphite in the precursor liquid that the first step obtains, obtain mixed liquor.Those skilled in the art easily know, in order to make expanded graphite be dispersed in precursor liquid, in adition process, also ceaselessly can stir precursor liquid.In addition, in order to prepare the expanded graphite of appropriate particle size more easily, expansible graphite can be incubated 8min ~ 12min at 500 DEG C ~ 700 DEG C, the particle size range of expansible graphite can be selected at 50 order ~ 80 orders.
3rd step: compressing after the mixed liquor obtained in second step is dried to powder, namely obtains compound adsorbent, and wherein dry temperature-controllable is made as 90 DEG C ~ 100 DEG C; In order to powder is shaping better, the compressing pressure of controlled system is at 14MPa ~ 20MPa.
Compound adsorbent provided by the invention adding by polyethylene glycol oxide, enhance the mechanical performance of compound adsorbent, simultaneously polyethylene glycol oxide also can not occluding material to the absorption/desorption of water.
Use the calcium chloride that Chemical Reagent Co., Ltd., Sinopharm Group produces in an embodiment, the polyethylene glycol oxide that SUMITOMO CHEMICAL group produces, the expansible graphite that Qingdao Cheng Tai Products Co., Ltd produces;
Adopt the 769YP-24B type powder compressing machine of Tianjin Keqi High Technology Corp.'s production by powder pressing forming.
Embodiment 1
Get 1000ml water, be dissolved in wherein by 8.00g calcium chloride, calcium chloride takes 4.00g polyethylene glycol oxide and is slowly dissolved in calcium chloride solution after dissolving completely, polyethylene glycol oxide dissolves namely obtain precursor liquid completely; Expansible graphite is incubated 8min at 500 DEG C, obtained expanded graphite; Take 8.00g expanded graphite again and put into precursor liquid, stir 1min dispersed to expanded graphite, obtain mixed liquor.Mixed liquor is placed in 95 DEG C of drying boxes 2 ~ 3 days until mixed liquor is dried completely, obtains mix powder.The powder taking 4.00g is placed in mould at 20MPa pressure 5min, i.e. obtained block compound adsorbent.
The compound adsorbent obtained is placed in outdoor environment, within 1 ~ 2 day, observe afterwards find compound adsorbent without any loose, layering, the phenomenon such as to peel off and occur, and there is moistening phenomenon on its surface, illustrate that compound adsorbent prepared by embodiment 1 has good adsorption desorption performance.
Embodiment 2
Get 2500ml water, be dissolved in wherein by 7.50g calcium chloride, calcium chloride takes 15.00g polyethylene glycol oxide and is slowly dissolved in calcium chloride solution after dissolving completely, polyethylene glycol oxide dissolves namely obtain precursor liquid completely; Expansible graphite is incubated 12min at 700 DEG C, obtained expanded graphite; Take 15.00g expanded graphite again and put into precursor liquid, stir 1min until in solution expanded graphite dispersed, obtain mixed liquor.Mixed liquor is placed in 90 DEG C of drying boxes 2 ~ 3 days until mixed liquor is dried completely, obtains mix powder.The powder taking 3.50g is placed in mould at 20MPa pressure 5min, i.e. obtained block compound adsorbent.
The compound adsorbent obtained is placed in outdoor environment, within 1 ~ 2 day, observe afterwards find compound adsorbent without any loose, layering, the phenomenon such as to peel off and occur, and there is moistening phenomenon on its surface, illustrate that compound adsorbent prepared by embodiment 2 has good adsorption desorption performance.
Embodiment 3
Get 1000ml water, be dissolved in wherein by 20.00g calcium chloride, calcium chloride takes 8.00g polyethylene glycol oxide and is slowly dissolved in calcium chloride solution after dissolving completely, polyethylene glycol oxide dissolves namely obtain precursor liquid completely; Expansible graphite is incubated 10min at 600 DEG C, obtained expanded graphite; Take 12.00g expanded graphite again and put into precursor liquid, stir 1min dispersed to expanded graphite, obtain mixed liquor.Mixed liquor is placed in 95 DEG C of drying boxes 2 ~ 3 days until mixed liquor is dried completely, obtains mix powder.The powder taking 4.00g is placed in mould at 20MPa pressure 5min, i.e. obtained block compound adsorbent.
The compound adsorbent obtained is placed in outdoor environment, within 1 ~ 2 day, observe afterwards find compound adsorbent without any loose, layering, the phenomenon such as to peel off and occur, and there is moistening phenomenon on its surface, illustrate that compound adsorbent prepared by embodiment 3 has good adsorption desorption performance.
Embodiment 4
Get 2500ml water, be dissolved in wherein by 12.00g calcium chloride, calcium chloride takes 16.00g polyethylene glycol oxide and is slowly dissolved in calcium chloride solution after dissolving completely, polyethylene glycol oxide dissolves namely obtain precursor liquid completely; Expansible graphite is incubated 12min at 500 DEG C, obtained expanded graphite; Take 12.00g expanded graphite again and put into precursor liquid, stir 1min dispersed to expanded graphite, obtain mixed liquor.The mixed liquor obtained is placed in 95 DEG C of drying boxes 2 ~ 3 days until mixed liquor is dried completely, obtains mix powder.The powder taking 3.50g is placed in mould at 20MPa pressure 5min, i.e. obtained block compound adsorbent.
The compound adsorbent obtained is placed in outdoor environment, within 1 ~ 2 day, observe afterwards find compound adsorbent without any loose, layering, the phenomenon such as to peel off and occur, and there is moistening phenomenon on its surface, illustrate that compound adsorbent prepared by embodiment 4 has good adsorption desorption performance.
Embodiment 5
Get 1000ml water, be dissolved in wherein by 6g calcium chloride, calcium chloride takes 8g polyethylene glycol oxide and is slowly dissolved in calcium chloride solution after dissolving completely, polyethylene glycol oxide dissolves namely obtain precursor liquid completely; Expansible graphite is incubated 8min at 700 DEG C, obtained expanded graphite; Taking the expanded graphite that 6g prepared is again dissolved in solution, stirs 1min dispersed to expanded graphite, obtains mixed liquor.Mixed liquor is placed in 95 DEG C of drying boxes 2 ~ 3 days until mixed liquor is dried completely, obtains mix powder.The powder taking 4.00g is placed in mould at 14MPa pressure 5min, i.e. obtained block compound adsorbent.
The compound adsorbent obtained is placed in outdoor environment, within 1 ~ 2 day, observe afterwards find compound adsorbent without any loose, layering, the phenomenon such as to peel off and occur, and there is moistening phenomenon on its surface, illustrate that compound adsorbent prepared by embodiment 5 has good adsorption desorption performance.
Although the present invention is described in conjunction with above embodiment, but the present invention is not defined to above-described embodiment, and only by the restriction of claims, those of ordinary skill in the art can easily modify to it and change, but do not leave essential idea of the present invention and scope.
Claims (7)
1. a compound adsorbent, is characterized in that, comprising:
Calcium chloride, expanded graphite and polyethylene glycol oxide, the mass percent of described calcium chloride is 20% ~ 50%, the mass percent of described expanded graphite is 30% ~ 40%, and the mass percent of described polyethylene glycol oxide is 20% ~ 40%, and the molecular weight of described polyethylene glycol oxide is 4 × 10
6~ 8 × 10
6.
2. prepare a method for compound adsorbent as claimed in claim 1, it is characterized in that, comprise the steps:
(1) calcium chloride and polyethylene glycol oxide are dissolved, obtain precursor liquid;
(2) add expanded graphite in the precursor liquid obtained in step (1), obtain mixed liquor;
(3) step (2) is obtained mixed liquor be dried to powder after compressing, namely obtain compound adsorbent.
3. method according to claim 2, is characterized in that, the described expanded graphite in step (2) is incubated 8min ~ 12min by expansible graphite and obtains at 500 DEG C ~ 700 DEG C.
4. method according to claim 3, is characterized in that, the particle diameter of described expansible graphite is 50 order ~ 80 orders.
5. method according to claim 2, is characterized in that, precursor liquid described in Keep agitation when adding expanded graphite in step (2).
6. method according to claim 2, is characterized in that, temperature dry described in step (3) is 90 DEG C ~ 100 DEG C.
7. method according to claim 2, is characterized in that, pressure compressing described in step (3) is 14MPa ~ 20MPa.
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| CN201310134776.8A CN103191704B (en) | 2013-04-18 | 2013-04-18 | Composite adsorbent and preparation method thereof |
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|---|---|---|---|
| CN201310134776.8A CN103191704B (en) | 2013-04-18 | 2013-04-18 | Composite adsorbent and preparation method thereof |
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| CN103191704A CN103191704A (en) | 2013-07-10 |
| CN103191704B true CN103191704B (en) | 2015-04-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104368312A (en) * | 2014-10-21 | 2015-02-25 | 繁昌县倍思生产力促进中心有限公司 | Adsorbent used for face masks and preparation method thereof |
| CN105582887B (en) * | 2015-12-31 | 2018-10-23 | 上海交通大学 | A kind of alkali halide expanded graphite solidification mixed adsorbent |
| CN108079934B (en) * | 2017-11-30 | 2019-02-22 | 山东大学 | A kind of composite material and preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613551A (en) * | 2004-09-29 | 2005-05-11 | 上海交通大学 | Calcium-expanding black lead mixed adsorbent |
| CN1648196A (en) * | 2004-12-23 | 2005-08-03 | 华南理工大学 | Anti-expansion ternary composite chemical absorptive refrigerant and its preparing method |
| CN1899683A (en) * | 2006-07-05 | 2007-01-24 | 南京工业大学 | Attapulgite lay base composite adsorbent for ammonia adsorption refrigeration and its preparing and use |
| CN101249420A (en) * | 2007-11-29 | 2008-08-27 | 上海交通大学 | Preparation of expanded graphite-chlorides composite adsorbing agent |
| CN102631888A (en) * | 2012-04-24 | 2012-08-15 | 中国科学院广州能源研究所 | Method for improving heat transfer and mass transfer performances of composite adsorbent |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613551A (en) * | 2004-09-29 | 2005-05-11 | 上海交通大学 | Calcium-expanding black lead mixed adsorbent |
| CN1648196A (en) * | 2004-12-23 | 2005-08-03 | 华南理工大学 | Anti-expansion ternary composite chemical absorptive refrigerant and its preparing method |
| CN1899683A (en) * | 2006-07-05 | 2007-01-24 | 南京工业大学 | Attapulgite lay base composite adsorbent for ammonia adsorption refrigeration and its preparing and use |
| CN101249420A (en) * | 2007-11-29 | 2008-08-27 | 上海交通大学 | Preparation of expanded graphite-chlorides composite adsorbing agent |
| CN102631888A (en) * | 2012-04-24 | 2012-08-15 | 中国科学院广州能源研究所 | Method for improving heat transfer and mass transfer performances of composite adsorbent |
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