CN103849358A - Molten salt composition - Google Patents
Molten salt composition Download PDFInfo
- Publication number
- CN103849358A CN103849358A CN201210566647.1A CN201210566647A CN103849358A CN 103849358 A CN103849358 A CN 103849358A CN 201210566647 A CN201210566647 A CN 201210566647A CN 103849358 A CN103849358 A CN 103849358A
- Authority
- CN
- China
- Prior art keywords
- fused salt
- salt composition
- nano
- kno
- lino
- 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.)
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- 150000003839 salts Chemical class 0.000 title claims abstract description 47
- 239000000203 mixture Substances 0.000 title claims abstract description 37
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims abstract 4
- 229910013553 LiNO Inorganic materials 0.000 claims description 17
- 238000010248 power generation Methods 0.000 claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 abstract 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract 2
- NLSCHDZTHVNDCP-UHFFFAOYSA-N caesium nitrate Inorganic materials [Cs+].[O-][N+]([O-])=O NLSCHDZTHVNDCP-UHFFFAOYSA-N 0.000 abstract 1
- 229910002651 NO3 Inorganic materials 0.000 description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 5
- 239000011833 salt mixture Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- Inorganic Compounds Of Heavy Metals (AREA)
- Fireproofing Substances (AREA)
- Seasonings (AREA)
Abstract
The invention provides a molten salt composition comprising: 15 to 26wt% LiNO3(ii) a 12 to 21wt% NaNO3(ii) a 43 to 53wt% KNO3(ii) a And 3 to 29wt% of Ba (NO)3)2Or 2 to 10wt% CsNO3。
Description
[technical field]
The present invention relates to fused salt composition, relate more specifically to the application of fused salt composition aspect solar energy generating.
[background technology]
Solar thermal energy power generation system needs a large amount of fused salts, using as heat energy medium.Fused salt cost accounts for 40 ~ 50% of heat storage system.In other words,, if can promote molten salt nature as reduced its fusing point, increase its specific heat and increasing its stability, can reduce cost of electricity-generating.
Current commercially available fused salt comprises nitrate composition
the NaNO that comprises 60wt%
3kNO with 40wt%
3, its fusing point is 220 DEG C, the specific heat (thermal capacity) of 25 DEG C is 1.3398J/gK, and the specific heat of 350 DEG C is 1.55J/gK.Commercially available fused salt is as the nitrate composition that Dow sold, the KNO that comprises 53wt%
3, 7wt% NaNO
3, with the NaNO of 40wt%
2, its fusing point is 142 DEG C.Commercially available fused salt is as the nitrate composition that Dow sold, the KNO that comprises 45wt%
3, 7wt% NaNO
3, with the Ca (NO of 48wt%
3)
2, its fusing point is 120 DEG C.
United States Patent (USP) 7,588, the LiNO that the 694 nitrate compositions that disclose comprise 13wt% to 21wt%
3, 9wt% to 18wt% NaNO
3, 40wt% to 52wt% KNO
3, and the Ca (NO of 20wt% to 27wt%
3)
2, its fusing point <100 DEG C, thermostability >500 DEG C.United States Patent (USP) 7,922,931 nitrite and the nitrate compositions that disclose comprise LiNO
3, NaNO
3, KNO
3, NaNO
2, and KNO
2, wherein Li accounts for 20mol% to 33.5mol%, and Na accounts for 18.6mol% to 40mol%, and K accounts for 40mol% to 50.3mol%, NO
3account for 36mol% to 50mol%, and NO
2account for 50mol% to 62.5mol%, its fusing point is between 70 DEG C to 80 DEG C.
In sum, the exploitation of fused salt is at present attached most importance to raising thermostability mainly with reducing fusing point.But in the application of solar thermal energy generating, the specific heat (thermal capacity) of fused salt is more important than fusing point.For instance, if can make fused salt specific heat double, the heat energy that fused salt of same amount can store also doubles, and can significantly reduce the cost of solar thermal energy generating.In other words, need at present the fused salt composition of high specific heat badly.
[summary of the invention]
One embodiment of the invention provides a kind of fused salt composition, comprising: the LiNO of 15wt% to 26wt%
3; The NaNO of 12wt% to 21wt%
3; The KNO of 43wt% to 53wt%
3; And the Ba (NO of 3wt% to 29wt%
3)
2or the CsNO of 2wt% to 10wt%
3.
[embodiment]
The fused salt composition that one embodiment of the invention provides comprises: the LiNO of 15wt% to 26wt%
3; The NaNO of 12wt% to 21wt%
3; The KNO of 43wt% to 53wt%
3; And the Ba (NO of 3wt% to 29wt%
3)
2or the CsNO of 2wt% to 10wt%
3, namely (1) LiNO
3, NaNO
3, KNO
3, with Ba (NO
3)
2composition; And (2) LiNO
3, NaNO
3, KNO
3, and CsNO
3composition.Above-mentioned fused salt composition has high specific heat (>1.5J/gK), and (fusing point is approximately 110 DEG C to 130 DEG C with broad liquid scope, thermal stable temperature up to 550 DEG C to 570 DEG C), be suitable for as heat transfer medium and heat-storing medium, to be applied to solar thermal energy generating, or the generating of collocation tradition is as thermal power generation or nuclear energy power generation etc., please refer to Hybrid Solar Thermal Power Plant (data source: the World Bank).If it should be noted that, the ratio of a certain salt in fused salt composition exceeds above-mentioned scope, i.e. the physical property of the deteriorated fused salt composition of possibility, such as reducing specific heat or reduction liquid scope.
For above and other object of the present invention, feature and advantage can be become apparent, multiple embodiment cited below particularly are described in detail below:
[embodiment]
Following LiNO
3, NaNO
3, KNO
3, Ba (NO
3)
2with CsNO
3purchased from J.T.Baker Chemicals.According to stoichiometric ratio, take above-mentioned salt and be placed in process furnace, be heated to maintain after 150 DEG C 4 hours to remove the moisture content in fused salt composition with electricradiator, reheat to maintaining 8 hours after 400 DEG C it is evenly mixed.So far obtain fused salt composition, outward appearance is at room temperature clear, colorless or opaque white color, and at high temperature the outward appearance of (>140 DEG C) is clear, colorless.Fused salt with visual observation heating has good mobility, so viscosity does not obviously increase.
Thermopair can be in order to measure the fusing point of fused salt composition.To change liquid temperature completely into be so-called fusing point to fused salt in heat-processed by solid-state, and in process of cooling, start to occur that solid-state temperature is so-called zero pour.
Thermogravimetric analyzer (TGA, model Labsys of Setarm Instrumentation) can be in order to measure the thermal stable temperature of fused salt composition.Under controlled atmosphere, heat fused salt, the weight of continuously measured fused salt.In the time exceeding thermal stable temperature, fused salt will resolve into gas gas-phase objects and weight reduction.
Differential scanning calorimeter (DSC, model Q20 of TA Instruments) can be in order to measure the specific heat of fused salt composition.Measure the specific heat of fused salt composition according to ASTM-E1269 specification (Standard Test Method for DeterminingSpecific Heat Capacity by Differential Scanning Calorimetry).
Embodiment 1
Get the LiNO of 16wt%
3, 13wt% NaNO
3, 43mol% KNO
3ba (NO with 28wt%
3)
2after mixing, be heated to maintain after 150 DEG C 4 hours to remove the moisture content in fused salt composition, reheat to maintaining 8 hours after 400 DEG C it is evenly mixed.The fusing point of above-mentioned molten salt mixture, zero pour, thermal stable temperature, specific heat (at 150 DEG C) are as shown in table 1.
Embodiment 2
Get the LiNO of 26wt%
3, 20wt% NaNO
3, 51wt% KNO
3ba (NO with 3wt%
3)
2after mixing, be heated to maintain after 150 DEG C 4 hours to remove the moisture content in fused salt composition, reheat to maintaining 8 hours after 400 DEG C it is evenly mixed.The fusing point of above-mentioned molten salt mixture, zero pour, thermal stable temperature, specific heat (at 150 DEG C) are as shown in table 1.
Embodiment 3
Get the LiNO of 22wt%
3, 18wt% NaNO
3, 50wt% KNO
3ba (NO with 10wt%
3)
2after mixing, be heated to maintain after 150 DEG C 4 hours to remove the moisture content in fused salt composition, reheat to maintaining 8 hours after 400 DEG C it is evenly mixed.The fusing point of above-mentioned molten salt mixture, zero pour, thermal stable temperature, specific heat (at 150 DEG C) are as shown in table 1.
Embodiment 4
Get the LiNO of 26wt%
3, 20wt% NaNO
3, 52wt% KNO
3, with the CsNO of 2wt%
3after mixing, be heated to maintain after 150 DEG C 4 hours to remove the moisture content in fused salt composition, reheat to maintaining 8 hours after 400 DEG C it is evenly mixed.The fusing point of above-mentioned molten salt mixture, zero pour, thermal stable temperature, specific heat (at 150 DEG C) are as shown in table 1.
Embodiment 5
Get the LiNO of 26wt%
3, 16wt% NaNO
3, 48wt% KNO
3, with the CsNO of 10wt%
3after mixing, be heated to maintain after 150 DEG C 4 hours to remove the moisture content in fused salt composition, reheat to maintaining 8 hours after 400 DEG C it is evenly mixed.The fusing point of above-mentioned molten salt mixture, zero pour, thermal stable temperature, specific heat (at 150 DEG C) are as shown in table 1.
Table 1
As shown in Table 1, fused salt composition in the embodiment of the present invention has high specific heat (>1.5J/gK), and (fusing point is approximately 110 DEG C to 130 DEG C with broad liquid scope, thermal stable temperature up to 550 DEG C to 570 DEG C), be suitable for as heat transfer medium and heat-storing medium.
Although the present invention discloses as above with multiple preferred embodiments, so it is not in order to limit the present invention, any the technical staff in the technical field of the invention, and without departing from the spirit and scope of the present invention, Ying Kezuo is change and retouching arbitrarily.Therefore the scope that, protection scope of the present invention should limit with appended claims is as the criterion.
Claims (7)
1. a fused salt composition, comprising:
(1) LiNO of 15wt% to 26wt%
3;
The NaNO of 12wt% to 21wt%
3;
The KNO of 43wt% to 53wt%
3; And
Ba (the NO of 3wt% to 29wt%
3)
2or the CsNO of 2wt% to 10wt%
3.
2. fused salt composition as claimed in claim 1, comprises the LiNO3 of 16wt%, the NaNO of 13wt%
3, 43wt% KNO
3, with the Ba (NO of 28wt%
3)
2.
3. fused salt composition as claimed in claim 1, comprises the LiNO of 26wt%
3, 20wt% NaNO
3, 51wt% KNO
3, with the Ba (NO of 3wt%
3)
2.
4. fused salt composition as claimed in claim 1, comprises the LiNO of 22wt%
3, 18wt% NaNO
3, 50wt% KNO
3, with the Ba (NO of 10wt%
3)
2.
5. fused salt composition as claimed in claim 1, comprises the LiNO of 26wt%
3, 20wt% NaNO
3, 52wt% KNO
3, with the CsNO of 2wt%
3.
6. fused salt composition as claimed in claim 1, comprises the LiNO of 26wt%
3, 16wt% NaNO
3, 48wt% KNO
3, with the CsNO of 10wt%
3.
7. fused salt composition as claimed in claim 1, it is heat transfer medium or the heat-storing medium of solar thermal energy power generation assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101144439 | 2012-11-28 | ||
| TW101144439A TWI473764B (en) | 2012-11-28 | 2012-11-28 | Molten salt composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103849358A true CN103849358A (en) | 2014-06-11 |
| CN103849358B CN103849358B (en) | 2016-12-28 |
Family
ID=50857491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210566647.1A Active CN103849358B (en) | 2012-11-28 | 2012-12-24 | Molten salt composition |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103849358B (en) |
| TW (1) | TWI473764B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108003845A (en) * | 2017-12-08 | 2018-05-08 | 中国科学院青海盐湖研究所 | A kind of ternary nitric acid fused salt and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4652279A (en) * | 1983-08-04 | 1987-03-24 | Erickson Donald C | Thermally stable noncorrosive water vapor absorbent |
| CN101050355A (en) * | 2007-05-14 | 2007-10-10 | 中山大学 | Fusion tray of thermal transmission and storage medium, and preparation method |
| US7588694B1 (en) * | 2008-02-14 | 2009-09-15 | Sandia Corporation | Low-melting point inorganic nitrate salt heat transfer fluid |
| WO2012107834A1 (en) * | 2011-02-11 | 2012-08-16 | Eni S.P.A. | Mixture of inorganic nitrate salts |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100038581A1 (en) * | 2006-12-13 | 2010-02-18 | Solar Millennium Ag | Multinary salt system for storing and transferring thermal energy |
| US20120056125A1 (en) * | 2010-04-19 | 2012-03-08 | Halotechnics, Inc | Inorganic salt heat transfer fluid |
-
2012
- 2012-11-28 TW TW101144439A patent/TWI473764B/en active
- 2012-12-24 CN CN201210566647.1A patent/CN103849358B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4652279A (en) * | 1983-08-04 | 1987-03-24 | Erickson Donald C | Thermally stable noncorrosive water vapor absorbent |
| CN101050355A (en) * | 2007-05-14 | 2007-10-10 | 中山大学 | Fusion tray of thermal transmission and storage medium, and preparation method |
| US7588694B1 (en) * | 2008-02-14 | 2009-09-15 | Sandia Corporation | Low-melting point inorganic nitrate salt heat transfer fluid |
| WO2012107834A1 (en) * | 2011-02-11 | 2012-08-16 | Eni S.P.A. | Mixture of inorganic nitrate salts |
Non-Patent Citations (1)
| Title |
|---|
| JUSTIN W. RAADE: "Molten salt heat transfer fluid with low melting point and high thermal stability", 《SOLARPACES》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108003845A (en) * | 2017-12-08 | 2018-05-08 | 中国科学院青海盐湖研究所 | A kind of ternary nitric acid fused salt and preparation method thereof |
| CN108003845B (en) * | 2017-12-08 | 2020-12-04 | 中国科学院青海盐湖研究所 | Ternary molten nitrate salt and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201420504A (en) | 2014-06-01 |
| TWI473764B (en) | 2015-02-21 |
| CN103849358B (en) | 2016-12-28 |
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| C14 | Grant of patent or utility model | ||
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