CN102935351B - Storage ammonia mixture porosu solid sample block containing carbon fiber and preparation method thereof - Google Patents
Storage ammonia mixture porosu solid sample block containing carbon fiber and preparation method thereof Download PDFInfo
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- CN102935351B CN102935351B CN201210238818.8A CN201210238818A CN102935351B CN 102935351 B CN102935351 B CN 102935351B CN 201210238818 A CN201210238818 A CN 201210238818A CN 102935351 B CN102935351 B CN 102935351B
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Abstract
The present invention relates to a kind of storage ammonia active mixture porosu solid sample block containing carbon fiber and preparation method thereof, storage ammonia active mixture porosu solid sample block forms primarily of anhydrous strontium chloride, carbon fiber and industrial ball clay, it is characterized in that its preparation method, concrete steps are as follows: by industrial anhydrous strontium chloride salt powder, carbon fiber, industrial ball clay, ionized water and industrial alcohol composition mixture; Mixture is stirred by mixer, and form the mixed powder of semi-drying, the mixed powder of this semi-drying adds one to and can carry out mechanical oscillation in the closed container of open type, forms wet body sample block; Sample block is at 60 ~ 80 DEG C, and vacuum is 10
-1dry under the condition of ~ 1kPa, or dry at the temperature of 100 DEG C; Which ensure that the storage ammonia characteristic of slaine turn improves mechanical strength and the structural stability of mixture sample block, the generation of the dry linting phenomenon preventing sample block from use producing due to vibration.
Description
Technical field
The present invention relates to a kind of storage ammonia mixture porosu solid sample block containing carbon fiber and preparation method thereof, be applied to vehicle exhaust after-treatment system and fuel cell system.
Background technology
Energy crisis and environmental pollution be the mankind enter 21st century must faced by two very severe problems.In the technological means selection of the emission compliance of orthodox car, and the fuel supply technical elements people of new-energy automobile still face many difficult problems.
Vehicle exhaust after-treatment system relies on the accurate supply of carbamide reducing agent and resolves into ammonia De NO X hazardous material afterwards in the front end of catalyst, and then a kind of system of the object reaching cleaning of off-gas.But in actual use, this dependence urea decomposition becomes the metered injection of the liquid area of ammonia to there is many deficiencies and difficult point, needs to solve further.Energy aspect, it is a technical scheme very effectively solving future source of energy problem that hydrogen cell automobile is recognized.But how stable acquisition hydrogen source is a no small difficult problem for restriction this area development.Ammonia is a kind of hydrogen-like presoma higher containing hydrogen density, and ammonia molecule belongs to active polar molecule, very active under normal temperature, very easily spreads, is not easy to store.If the storage problem of ammonia can be resolved, the technology path that a new ammonia utilizes just can be opened up.
Industrial, utilize the reversible process of the adsorption-desorption of slaine and ammonia to be applied to food fresh keeping refrigeration, first the adsorption process of slaine and ammonia is exothermic process, then ammonia desorb absorbs heat again, environment is freezed, therefore, some specific slaine is basic physical chemistry general knowledge to ammonia gas absorption desorb.In national patent Information Network, retrieve with " storage ammonia ", " slaine " word that is the theme, the patent No. is that ' high-density city of ammonia ' patent of CN200680005886.2 comprises ammonia absorption/desorption solid material, this material is easily prepared and to be processed and can the storage ammonia of very high-density, and ammonia easily discharges under controlled conditions.But, this patent adopts the direct compression molding of solid material, adopt binding agent, only stating may be silicon dioxide fibre binding agent, not dosage ratio, also only states that solid material may comprise granular materials, porous material, crystalline material, amorphous materials or their bond composition in other claim and embodiment, does not have the thin item of clear and definite claim, industry technology personage almost cannot implement, and then produces this patent.
The present invention relies on the strontium chloride metal salt powder with better adsorption capacity can carry out the principle of the sorption and desorption of ammonia under certain condition, prepares a kind of active mixture that can store ammonia and release ammonia.This mixture contains a certain amount of carbon fiber (carbon fiber), and to increase mechanical strength and the stability of slaine sample block, this is that the particularity the subject of knowledge and the object of knowledge had due to carbon fiber itself determines.The similar Delanium of microstructure of carbon fiber, it is random graphits structure, it is a kind of new material of excellent in mechanical performance, its proportion is less than 1/4 of steel, carbon fiber resin composite material tensile strength is general all at more than 3500Mpa, be 7 ~ 9 times of steel, tensile modulus of elasticity is that 230 ~ 430Gpa is also higher than steel.
A kind of special fibre that carbon fiber is mainly made up of carbon, its phosphorus content is different with kind difference, generally more than 90%.Carbon fiber has the characteristic of general carbon materials, as high temperature resistant, rub resistance, conduction, heat conduction and corrosion-resistant etc., but with general carbon materials unlike, its profile has significant anisotropy, softness, can be processed into various fabric, shows very high intensity along fiber axis direction.Carbon fiber proportion is little, therefore has very high specific strength, is higher by phosphorus content, and manufactured chemical's fiber of not melting in heat treatment process, makes through techniques such as thermally-stabilised oxidation processes, carbonization treatment and graphitizations.
The main application of carbon fiber is and the matrix compounds such as resin, metal, pottery make structural material.Carbon-fibre reinforced epoxy resin composite material, its specific strength, specific modulus overall target are the highest in existing structure material.The field of strict demand is had in density, rigidity, weight, fatigue properties etc., requiring the occasion that high temperature, chemical stability are high, carbon fibre composite all has much advantage and comprises following feature: high strength, outstanding heat resistance, outstanding thermal-shock resistance, low thermal coefficient of expansion, thermal capacity is little, proportion is little, anticorrosive outstanding with radiance.
Summary of the invention
The object of this invention is to provide a kind of storage ammonia active mixture porosu solid sample block containing carbon fiber and preparation method thereof, which ensure that the storage ammonia characteristic of slaine turn improves mechanical strength and the structural stability of mixture sample block, the generation of the dry linting phenomenon preventing sample block from use producing due to vibration.
Technical scheme of the present invention is achieved in that a kind of storage ammonia active mixture porosu solid sample block containing carbon fiber and preparation method thereof, storage ammonia active mixture porosu solid sample block forms primarily of anhydrous strontium chloride, carbon fiber and industrial ball clay, it is characterized in that its preparation method, concrete steps are as follows:
(1) by the industrial anhydrous strontium chloride salt powder of percentage by weight 68 ~ 80wt%, the carbon fiber of 4 ~ 8wt%, the industrial ball clay of 2 ~ 4wt%, the deionized water of 3 ~ 12wt% and the industrial alcohol composition mixture of 6 ~ 10wt%;
(2) mixture is stirred by mixer, stirs 1 ~ 10h, forms the mixed powder of semi-drying;
(3) mixed powder of this semi-drying adds one to and can carry out mechanical oscillation 30 ~ 60 minutes in the closed container of open type, forms wet body sample block;
(4) sample block is at 60 ~ 80 DEG C, and vacuum is 10
-1dry 1 ~ 4h under the condition of ~ 1kPa, or at the temperature of 100 DEG C dry 2 ~ 4h.
Good effect of the present invention which ensure that the storage ammonia characteristic of slaine turn improves mechanical strength and the structural stability of mixture sample block, the generation of the dry linting phenomenon preventing sample block from use producing due to vibration, sample block can concentrate use, can meet the storage of Large Copacity ammonia and the instructions for use of release.
Accompanying drawing explanation
Fig. 1 is the thermogravimetric curve figure after mixture porosu solid sample block absorbing ammonia of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the invention will be further described:
embodiment 1
(1) by the industrial anhydrous strontium chloride salt powder of 68wt%, the carbon fiber of 8wt%, the industrial ball clay of 4wt%, the deionized water of 12wt% and the industrial alcohol composition mixture of 8wt%;
(2) mixture is stirred by mixer, and mixing time is 1h, forms the mixed powder of semi-drying;
(3) mixed powder of this semi-drying adds one to and can carry out mechanical oscillation 30 minutes in the closed container of open type, forms wet body sample block;
(4) sample block is at 80 DEG C, and vacuum is 10
-1under the condition of kPa, dry 4h can obtain the activity storage ammonia mixture porosu solid sample block containing 10wt% carbon fiber.
10g porosu solid sample block is carried out filling ammonia, carry out under the environment of gravity-flow ventilation, in advance the closed container of open type can put into the tank of the enough large cooling water of water yield, connect ammonia steel cylinder, by pressure-reducing valve and drying system, slowly carry out filling ammonia in the pressure limit of 0.2Mpa, filling the ammonia time is 5h; After filling ammonia, this sample block quality is 18g, i.e. absorbing ammonia 8g.And then sample block is heated at 200 DEG C, found that, after heating, sample block quality becomes 10.8g, and namely release ammonia 7.2g, desorption efficiency is 90%.
embodiment 2
(1) by the industrial anhydrous strontium chloride salt powder of 80wt%, the carbon fiber of 4wt%, the industrial ball clay of 3wt%, the deionized water of 7wt% and the industrial alcohol composition mixture of 6wt%;
(2) mixture is stirred by mixer, and mixing time is 10h, forms the mixed powder of semi-drying;
(3) mixed powder of this semi-drying adds one to and can carry out mechanical oscillation 60 minutes in the closed container of open type, forms wet body sample block;
(4) sample block is at 60 DEG C, and vacuum is that under the condition of 1kPa, dry 1h can obtain the activity storage ammonia mixture porosu solid sample block containing 4.6wt% carbon fiber.
10g porosu solid sample block is carried out filling ammonia, carry out under the environment of gravity-flow ventilation, in advance the closed container of open type can put into the tank of the enough large cooling water of water yield, connect ammonia steel cylinder, by pressure-reducing valve and drying system, slowly carry out filling ammonia in the pressure limit of 0.4Mpa, filling the ammonia time is 6h; After filling ammonia, this sample block quality is 14.2g, i.e. absorbing ammonia 4.2g.And then sample block is heated at 200 DEG C, found that, after heating, sample block quality becomes 11.2g, and namely release ammonia 3.0g, desorption efficiency is 71%.
embodiment 3
(1) by the industrial anhydrous strontium chloride salt powder of 75wt%, the carbon fiber of 10wt%, the industrial ball clay of 2wt%, the deionized water of 3wt% and the industrial alcohol composition mixture of 10wt%;
(2) mixture is stirred by mixer, and mixing time is 4h, forms the mixed powder of semi-drying;
(3) mixed powder of this semi-drying adds one to and can carry out mechanical oscillation 40 minutes in the closed container of open type, forms wet body sample block;
(4) sample block is at 100 DEG C, and dry 4h can obtain the activity storage ammonia mixture porosu solid sample block containing 11wt% carbon fiber.
10g porosu solid sample block is carried out filling ammonia, carry out under the environment of gravity-flow ventilation, in advance the closed container of open type can put into the tank of the enough large cooling water of water yield, connect ammonia steel cylinder, by pressure-reducing valve and drying system, slowly carry out filling ammonia in the pressure limit of 0.2Mpa, filling the ammonia time is 7h; After filling ammonia, this sample block quality is 15.3g, i.e. absorbing ammonia 5.3g.And then sample block is heated at 200 DEG C, found that, after heating, sample block quality becomes 10.9g, and namely release ammonia 4.4g, desorption efficiency is 80%.
Claims (1)
1. a preparation method for the storage ammonia active mixture porosu solid sample block containing carbon fiber, is characterized in that concrete steps are as follows:
(1) by the industrial anhydrous strontium chloride salt powder of percentage by weight 68 ~ 80wt%, the carbon fiber of 4 ~ 8wt%, the industrial ball clay of 2 ~ 4wt%, the deionized water of 3 ~ 12wt% and the industrial alcohol composition mixture of 6 ~ 10wt%;
(2) mixture is stirred by mixer, stirs 1 ~ 10h, forms the mixed powder of semi-drying;
(3) mixed powder of this semi-drying adds one to and can carry out mechanical oscillation 30 ~ 60 minutes in the closed container of open type, forms wet body sample block;
(4) sample block is at 60 ~ 80 DEG C, and vacuum is 10
-1dry 1 ~ 4h under the condition of ~ 1kPa, or at the temperature of 100 DEG C dry 2 ~ 4h.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101454064A (en) * | 2006-02-27 | 2009-06-10 | 氨合物股份公司 | A method of storing and delivering ammonia and the use of electromagnetic radiation for desorption of ammonia from a chemical complex |
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| JP4745299B2 (en) * | 2007-06-25 | 2011-08-10 | Ｊｆｅエンジニアリング株式会社 | Adsorption / desorption material of ammonia using a combination of specific metal halides, separation method and storage method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101454064A (en) * | 2006-02-27 | 2009-06-10 | 氨合物股份公司 | A method of storing and delivering ammonia and the use of electromagnetic radiation for desorption of ammonia from a chemical complex |
| 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 |
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