CN106433577A - Chemical heat storage material with high heat storage density, and preparation method thereof - Google Patents
Chemical heat storage material with high heat storage density, and preparation method thereof Download PDFInfo
- Publication number
- CN106433577A CN106433577A CN201610771412.4A CN201610771412A CN106433577A CN 106433577 A CN106433577 A CN 106433577A CN 201610771412 A CN201610771412 A CN 201610771412A CN 106433577 A CN106433577 A CN 106433577A
- Authority
- CN
- China
- Prior art keywords
- heat storage
- storage material
- heat
- expanded graphite
- calcium hydroxide
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/16—Materials undergoing chemical reactions when used
- C09K5/18—Non-reversible chemical reactions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to a preparation method of a chemical heat storage material with high heat storage density. The chemical heat storage material comprises the following components: 80 to 95 percent of calcium hydroxide serving as a heat storage material, 3.75 to 15 percent of expanded graphite and 1.25 to 5 percent of lithium bromide. The preparation method comprises the steps of mixing lithium bromide and absolute ethanol, further adding calcium hydroxide, dispersing uniformly, adding the expanded graphite into the mixture, performing pressure-reducing evaporation and drying treatment to obtain the heat storage material, and performing compaction treatment to obtain the chemical heat storage material. By the preparation method of the chemical heat storage material with high heat storage density, the unit volume high heat storage density of the heat storage material can be greatly increased, and the costs of equipment, land occupation, transportation and the like are lowered.
Description
Technical field
The present invention relates to the technology in heat accumulation field, specifically one kind have unit volume storage density in 1500KJ/L
Above and be favorably improved the chemical heat storage material preparation method of heat transfer property.
Background technology
Increasingly serious with global energy shortage problem, the storage reutilization technology of heat energy is also more and more important, and becomes
For researching and developing focus, thermal energy storage mode includes：Sensible heat, latent heat and three kinds of modes of chemical reaction heat.
Heat-storage technology is to improve the important technology of efficiency of energy utilization and environmental protection, and can be used for solution heat energy needs for giving
Seek the contradiction of mismatch, have widely in fields such as electric power " peak load shifting ", the recyclings of Solar use, used heat and waste heat
Application prospect.Chemical heat storage is to store release heat, phase transformation sensible heat and latent heat, the heat accumulation of chemical heat using chemical reaction process
Density is bigger, and does not need the insulation of normal temperature to store, can effective utilization space and cost-effective.
Chemical heat storage has the advantages that in many heat accumulation modes energy storage density is big, adjustable working wide temperature range, but
The bulk density of existing powder granule shape heat accumulating is too small, leads to unit volume storage density less than theoretical storage density very
Many, and chemical heat storage material mostly is inorganic material powders, heat transfer property is poor.
Content of the invention
The present invention be directed to deficiencies of the prior art it is proposed that a kind of high heat storage density chemical heat accumulating and its
Preparation method, can be greatly improved the unit volume quantity of heat storage of existing powder granule material, and improve its heat conductivility.
The present invention is achieved by the following technical solutions：
The present invention relates to a kind of high heat storage density chemical heat accumulating, its component and mass percentage content are：As storage
The calcium hydroxide of hot material is 80～95%, expanded graphite 3.75～15% and lithium bromide 1.25%～5%.
The mass percent of described calcium hydroxide is preferably 90%；
The mass percent of described expanded graphite is preferably 7.5%；
The mass percent of described lithium bromide is preferably 2.5%.
The present invention relates to the preparation method of above-mentioned chemical heat storage material, by lithium bromide being mixed laggard one with absolute ethyl alcohol
Step adds calcium hydroxide simultaneously dispersed, then add in mixture expanded graphite and be evaporated under reduced pressure with dried process after heat accumulation
Material, after through compression process obtain final product.
Described is dispersed, is stirred 20 minutes by ultrasonic wave and realizes.
Described expanded graphite, is preferably previously placed in electric furnace, expands 20 minutes at 500 DEG C.
Described reduction vaporization, removes absolute ethyl alcohol by being placed in 120 minutes in vacuum drying chamber.
Described dried process, heats 24 hours preferably under 120 DEG C of environment.
Described compression is processed, and preferably uses tablet press machine, dried heat accumulating is densified to cylindric.
The present invention relates to the application of above-mentioned chemical heat storage material, the storage recycling of industrial waste heat can be used it for, and
The aspects such as the storage utilization of solar heat.
Technique effect
Compared with existing heat accumulating and technology, the present invention can be greatly improved the unit volume heat accumulation of chemical heat storage material
Density, can rise to more than 1500KJ/L by 500KJ/L.In addition the addition of expanded graphite can also improve heat accumulation material
The heat conductivility of material.
Brief description
Fig. 1 is the inventive method flow chart；
Fig. 2 is aspect graph after being evaporated for the heat accumulating of the present invention；
Picture after tabletting machine shaping for Fig. 3 heat accumulating；
Fig. 4 is high heat storage density material DSC test data that heat accumulating calcium hydroxide proportion is when 90%.
Specific embodiment
Embodiment 1
As shown in figure 1, the present embodiment comprises the following steps：
Step 1, the lithium bromide (analysis is pure, and Chemical Reagent Co., Ltd., Sinopharm Group produces) weighing 0.35g is added to about
In the middle of the absolute ethyl alcohol of 200mL, it is then placed in 12g calcium hydroxide (analysis is pure, and Chemical Reagent Co., Ltd., Sinopharm Group produces),
Stirred 20 minutes using ultrasonic wave.
Step 2, weighs 1g expanded graphite, is placed in electric furnace, expands 20 minutes, then by the stone having expanded at 500 DEG C
Ink is placed in mixture, is subsequently placed in vacuum drying chamber and carries out being evaporated under reduced pressure 120 minutes, to remove absolute ethyl alcohol.Residue
It is placed in and heats 24 hours at 120 DEG C in drying box, obtain dried heat accumulating (as shown in Figure 2).
Step 3, using tablet press machine as shown in Figure 3, carries out to the heat accumulating obtaining after drying being compacted compressing tablet, block is
Cylindric (as shown in Figure 3), a size of diameter 8mm, high 8.3mm, can be calculated volume be 0.417ml, again for
544.52mg can obtain cylinder volume density 1.3058kg/L.The fritter of one 45mg is taken from cylinder, then using differential scanning
Calorimeter (DSC) carries out quantity of heat storage test to heat accumulating, the heat 52668mJ (as shown in Figure 4) then being obtained using test,
Converted, result shows that the heat accumulating unit volume storage density produced is 1528KJ/L.
Embodiment 2
As shown in figure 1, the present embodiment comprises the following steps：
Step 1, the lithium bromide (analysis is pure, and Chemical Reagent Co., Ltd., Sinopharm Group produces) weighing 0.7g is added to about
In the middle of the absolute ethyl alcohol of 200mL, (analysis is pure, and Chemical Reagent Co., Ltd., Sinopharm Group gives birth to be then placed in 10.8g calcium hydroxide
Produce), stirred 20 minutes using ultrasonic wave
Step 2, weighs 2g expanded graphite, is placed in electric furnace, expands 20 minutes, then by the stone having expanded at 500 DEG C
Ink is placed in mixture, is subsequently placed in vacuum drying chamber and carries out being evaporated under reduced pressure 120 minutes, to remove absolute ethyl alcohol.Residue
It is placed in and heats 24 hours at 120 DEG C in drying box, obtain dried heat accumulating (as shown in Figure 2).
Step 3, using tablet press machine as shown in Figure 3, carries out to the heat accumulating obtaining after drying being compacted compressing tablet, block is
Cylindric, a size of diameter 8mm, high 7.5mm.The fritter of one 39mg is taken from cylinder, then using means of differential scanning calorimetry
Instrument (DSC) carries out quantity of heat storage test to heat accumulating, the heat then being obtained using test, is converted with embodiment 1 method,
Result shows that the heat accumulating unit volume storage density produced is 1307KJ/L.
Embodiment 3
As shown in figure 1, the present embodiment comprises the following steps：
Step 1, the lithium bromide (analysis is pure, and Chemical Reagent Co., Ltd., Sinopharm Group produces) weighing 0.2g is added to about
In the middle of the absolute ethyl alcohol of 200mL, (analysis is pure, and Chemical Reagent Co., Ltd., Sinopharm Group gives birth to be then placed in 12.8g calcium hydroxide
Produce), stirred 20 minutes using ultrasonic wave
Step 2, weighs 0.5g expanded graphite, be placed in electric furnace, expands 20 minutes, then will expand at 500 DEG C
Graphite is placed in mixture, is subsequently placed in vacuum drying chamber and carries out being evaporated under reduced pressure 120 minutes, to remove absolute ethyl alcohol.Remaining
Thing is placed in and heats 24 hours at 120 DEG C in drying box, obtains dried heat accumulating (as shown in Figure 2).
Step 3, using tablet press machine as shown in Figure 3, carries out to the heat accumulating obtaining after drying being compacted compressing tablet, block is
Cylindric, a size of diameter 8mm, high 8mm.The fritter of one 41mg is taken from cylinder, then using differential scanning calorimeter
(DSC) quantity of heat storage test is carried out to heat accumulating, the heat then being obtained using test, converted with embodiment 1 method, knot
Fruit shows that the heat accumulating unit volume storage density produced is 1587KJ/L.
Result shows, the heat accumulating of the present invention, after the preparation of above-mentioned steps, can form more close form,
With the 500KJ/L of existing powder loose structure heat accumulating about storage density, more than 1500KJ/L can be risen to, significantly
Improve the unit volume storage density of powder loose structure heat accumulating, not only can save cost of transportation it is also possible to save
Equipment and cost of floor space.
Above-mentioned be embodied as can by those skilled in the art on the premise of without departing substantially from the principle of the invention and objective with difference
Mode local directed complete set is carried out to it, protection scope of the present invention is defined by claims and is not embodied as institute by above-mentioned
Limit, each implementation in the range of it is all by the constraint of the present invention.
Claims (8)
1. a kind of high heat storage density chemical heat accumulating is it is characterised in that component and mass percentage content are：As heat accumulation material
The calcium hydroxide of material is 80～95%, expanded graphite 3.75～15% and lithium bromide 1.25%～5%.
2. chemical heat storage material according to claim 1, is characterized in that, the mass percent of described calcium hydroxide is
90%；The mass percent of described expanded graphite is 7.5%；The mass percent of described lithium bromide is 2.5%.
3. a kind of preparation method preparing chemical heat storage material described in any of the above-described claim is it is characterised in that pass through bromine
Change after lithium mixes with absolute ethyl alcohol and add calcium hydroxide dispersed further, then addition expanded graphite is simultaneously in mixture
Be evaporated under reduced pressure and dried process after heat accumulating, after through compression process obtain final product.
4. method according to claim 3, is characterized in that, described is dispersed, stirs 20 minutes in fact by ultrasonic wave
Existing.
5. method according to claim 3, is characterized in that, described expanded graphite, is previously placed in electric furnace, at 500 DEG C
Lower expansion 20 minutes.
6. method according to claim 3, is characterized in that, described reduction vaporization, by being placed in 120 in vacuum drying chamber
Minute is to remove absolute ethyl alcohol.
7. method according to claim 3, is characterized in that, described dried process, and under 120 DEG C of environment, heating 24 is little
When.
8. method according to claim 3, is characterized in that, described compression is processed, and preferably uses tablet press machine, after drying
Heat accumulating compacting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610771412.4A CN106433577A (en) | 2016-08-30 | 2016-08-30 | Chemical heat storage material with high heat storage density, and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610771412.4A CN106433577A (en) | 2016-08-30 | 2016-08-30 | Chemical heat storage material with high heat storage density, and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106433577A true CN106433577A (en) | 2017-02-22 |
Family
ID=58091500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610771412.4A Pending CN106433577A (en) | 2016-08-30 | 2016-08-30 | Chemical heat storage material with high heat storage density, and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106433577A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107098718A (en) * | 2017-05-12 | 2017-08-29 | 哈尔滨工业大学 | It is a kind of suppress to sinter, the calcium base chemical heat storage material that strengthens heat conduction and preparation method thereof |
| CN107523277A (en) * | 2017-07-31 | 2017-12-29 | 常州聚盛节能工程有限公司 | A kind of chemical heat-accumulating material and preparation method thereof |
| CN109097003A (en) * | 2018-08-27 | 2018-12-28 | 上海交通大学 | With infiltrative heat chemistry heat accumulation shaped granule of optimization and preparation method thereof |
| CN111154460A (en) * | 2018-11-07 | 2020-05-15 | 上海交通大学 | Chemical heat storage material with high heat storage speed and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586011A (en) * | 2014-10-31 | 2016-05-18 | 镇江新梦溪能源科技有限公司 | Inorganic hydrated salt phase-change heat-storage material and preparation method thereof |
-
2016
- 2016-08-30 CN CN201610771412.4A patent/CN106433577A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586011A (en) * | 2014-10-31 | 2016-05-18 | 镇江新梦溪能源科技有限公司 | Inorganic hydrated salt phase-change heat-storage material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| J.YAN, C.Y.ZHAO: "First-principle study of CaO/Ca(OH)2 thermochemical energy storage system by Li or Mg cation doping", 《CHEMICAL ENGINEERING SCIENCE》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107098718A (en) * | 2017-05-12 | 2017-08-29 | 哈尔滨工业大学 | It is a kind of suppress to sinter, the calcium base chemical heat storage material that strengthens heat conduction and preparation method thereof |
| CN107523277A (en) * | 2017-07-31 | 2017-12-29 | 常州聚盛节能工程有限公司 | A kind of chemical heat-accumulating material and preparation method thereof |
| CN109097003A (en) * | 2018-08-27 | 2018-12-28 | 上海交通大学 | With infiltrative heat chemistry heat accumulation shaped granule of optimization and preparation method thereof |
| CN109097003B (en) * | 2018-08-27 | 2020-06-09 | 上海交通大学 | Thermochemical heat storage molded particle with optimized permeability and preparation method thereof |
| CN111154460A (en) * | 2018-11-07 | 2020-05-15 | 上海交通大学 | Chemical heat storage material with high heat storage speed and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106433577A (en) | Chemical heat storage material with high heat storage density, and preparation method thereof | |
| Sun et al. | Using silicagel industrial wastes to synthesize polyethylene glycol/silica-hydroxyl form-stable phase change materials for thermal energy storage applications | |
| Du et al. | Development of capric acid-stearic acid-palmitic acid low-eutectic phase change material with expanded graphite for thermal energy storage | |
| CN103436723B (en) | A kind of quickly preparation high-performance Mg2the method of Si base thermoelectricity material | |
| CN102061403A (en) | Porous material matrix and composite phase-change heat storage material and preparation methods thereof | |
| CN103979608B (en) | A kind of preparation method of hollow core-shell Vanadium Pentoxide in FLAKES microballoon | |
| CN105199675A (en) | Composite phase change material set by oxidized graphene and preparing method thereof | |
| CN106587847B (en) | A kind of graphene-cement base high-heat-conductive composite material and preparation method thereof | |
| Hekimoğlu et al. | Utilization of waste apricot kernel shell derived-activated carbon as carrier framework for effective shape-stabilization and thermal conductivity enhancement of organic phase change materials used for thermal energy storage | |
| CN109609098B (en) | Composite phase-change heat storage material and preparation thereof | |
| CN105062430A (en) | Preparation method for polyethylene glycol/silicon dioxide/expandable graphite composite shape-stabilized phase change material | |
| Ao et al. | Stearic acid/expanded graphite composite phase change material with high thermal conductivity for thermal energy storage | |
| CN103146351B (en) | Shaped phase-change material with high heat-conducting property and preparation method thereof | |
| CN106634854A (en) | Foamed graphene/phase-change composite energy storage material and preparation method therefor | |
| CN102757771A (en) | Composite chemical heat storage material and preparation method thereof | |
| CN106967390A (en) | A kind of low-temperature inorganic composite phase-change heat-storage material and preparation method thereof | |
| CN104774594A (en) | Preparation method of phase-change composite material with high heat conductivity and high density | |
| CN106867468A (en) | A kind of inorganic salts mass of expanded graphite bluk recombination phase-change material and preparation method thereof | |
| Liu et al. | Preparation and thermal properties of low melting point alloy/expanded graphite composite phase change materials used in solar water storage system | |
| CN111826127A (en) | Preparation method of paraffin graphite flake and expanded graphite composite phase change material | |
| CN103183862A (en) | High-thermal-conductivity phase-change composite material and preparation process thereof | |
| Haillot et al. | Storage composites for the optimisation of solar water heating systems | |
| CN104804712A (en) | Metal-chloride melt material with high heat conductivity as well as preparation method and application of metal-chloride melt material | |
| CN104371659A (en) | Attapulgite-base composite phase-change heat storage material and preparation method thereof | |
| Ao et al. | Design of a stearic acid/boron nitride/expanded graphite multifiller synergistic composite phase change material for thermal energy storage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |
|
| RJ01 | Rejection of invention patent application after publication |