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Feb 10, 2020· J. Seo and D. Shin, " Size effect of nanoparticle on specific heat in a ternary nitrate (LiNO 3 –NaNO 3 –KNO 3) salt eutectic for thermal energy storage," Appl. Thermal Eng. 102, 144– 148 (2016).
Nov 15, 2008· Herein, the NaNO 3 –KNO 3 eutectic plays important roles in the formation of better-dispersed ZnO nanocrystallites. The method of adding precursor to NaNO 3 –KNO 3 eutectic with the required ratio is often close to an eutectic stoichiometry, which will afterwards accelerate the kinetics of synthesis of the desired products. In the process, the eutectic serves as a solvent with no direct ...
A low-melting point, heat transfer fluid made of a mixture of four inorganic nitrate salts: 9-18 wt % NaNO 3, 40-52 wt % KNO 3, 13-21 wt % LiNO 3, and 20-27 wt % Ca(NO 3 ) 2 . These compositions can have liquidus temperatures less than 100 C; thermal stability limits greater than 500 C; and viscosity in the range of 5-6 cP at 300 C; and 2-3 cP at 400 C.
Sep 01, 2017· In the present work, the liquidus curves of the LiNO 3 -NaNO 3 -KNO 3 -Ca(NO 3 ) 2 system is determined by conformal ionic solution theory according to the solid-liquid equilibrium state of the binary mixture. The calculated eutectic temperature of the mixture is 93.17 {°}C, which is close to the experimental value of 93.22 {°}C obtained from ...
Article. Kinetics of isothermal annealing of ɣ-irradiated eutectic mixture of NaNO 3 -KNO 3. March 2019; European Chemical Bulletin 8(2):44-46
Oct 15, 2019· Accordingly, an eutectic mixture of menthol:thymol (1:2) was confirmed as the best candidate for the TTAs extraction from E. globulus outer bark, leading to extraction yields (weight of TTA per weight of biomass) at room temperature of 1.8 wt% for ursolic acid, 0.84 wt% for oleanolic acid and 0.30 wt% for betulinic acid. These values are ...
Nano size nickel oxide (about 15 nm) has been prepared by the reaction of nickel sulphate in NaNO3 - KNO3 eutectic melt. The specific reaction conditions for the preparation of nano size NiO have ...
Jul 05, 2012· Solubility, the phenomenon of dissolution of solute in solvent to give a homogenous system, is one of the important parameters to achieve desired concentration of drug in systemic circulation for desired (anticipated) pharmacological response. Low aqueous solubility is the major problem encountered with formulation development of new chemical entities as well as for the generic …
eutectic point for the NaCl-NaNO 3 salt assemblage. The calculation for this assemblage is completed by a complementary run in which halite is added to a soda niter saturated solution until the same eutectic point is reached. An identical approach is used for the KNO 3-NaNO 3-H 2O and NaCl-KNO 3-H 2O systems. We use the EQ3/6 geochemical code
and KNO 3. The NaNO 3 and KNO 3 vapor pressures increase bydtwo orders of magnitude with the temperature increasing from 500 to 700 C. Figure 1. b shows that the lowest melting temperature of the base NaNO 3-KNO 3 system is about 223°C at the equimolar composition. Therefore, the NaNO 3-KNO 3 equimolar mixture was used as a base case in this ...
Nov 16, 2020· (i.e., above the melting point of the salt eutectic). For example, Chieruzzi et al. [37] prepared molten salt nanofluids by mixing SiO 2 and Al 2O 3 nanoparticles with NaNO 3-KNO 3 solar salt at 300 °C in a micro-conical twin screw compounder. Chen et …
Jul 14, 2019· Sodium chloride and water form a eutectoid when the mixture is 23.3% salt by mass with a eutectic point at -21.2 degrees Celsius. The system is used to make ice cream and to melt ice and snow.; The eutectic point of the mixture of ethanol and water is nearly pure ethanol.
composed of a binary nitrate eutectic salt, known commercially as "solar salt". This solar salt is a mixture of NaNO 3 and KNO 3 in proportions of 60 and 40 mol %, respectively. The NaNO 3 and KNO 3 were purchased from ACROS Organics and Fisher Scientific, respectively, with …
The first study of the eutectic point of the mix lithium, sodium and potassium nitrates is from 1964 (Levin et al., 1964). In that work it is important to point out the composition, 17.3% NaNO 3 + 59.4% KNO 3 + 23.3% LiNO 3, which presents the lowest melting point.
For example, the eutectic mixture composed of 52 wt% KNO 3 -18 wt% NaNO 3 -30 wt% LiNO 3 exhibits a melting point of 120°C [22] and can be used up to …
Ethanol–water has an unusually biased eutectic point, i.e. it is close to pure ethanol, which sets the maximum proof obtainable by fractional freezing. "Solar salt", 60% NaNO 3 and 40% KNO 3, forms a eutectic molten salt mixture which is used for thermal energy storage in …
Jul 11, 2018· The eutectic NaNO 3-KNO 3 mixture has the chemical composition Na 0.5 K 0.5 NO 3. Due to the lower mass of Na, this corresponds to a 45.67% NaNO 3 –54.33% KNO …
Apr 10, 2018· The Zn eutectic mixture showed an impressive electrochemical stable window up to 1.3 V vs. Ag/AgCl, which is comparable with most organic electrolyte used in Li +-ion batteries 34. Moreover, the utilization ratio of Zn eutectic mixture with variable ZnCl 2 concentration was examined in a half-cell (5 M Zn eutectic
Consequently, a ternary deep eutectic has also been observed [4]. (iv) The ternary solid state is characterised by four solid solutions, one of which is the extent in the ternary system of the continuous subsolidus solution of the binary system NaNO,-KNO,.Thermodynamic data are available for …
Preparation of eutectic mixture Dried samples of NaNO 3 and KNO 3 were mixed in 45:55 weight percent ratios in a cleaned glass tube. The mixture was allowed to melt in an oil bath and mixed thoroughly. The molten mass was chilled in ice cold water. The process of melting and chilling was repeated several times in order to make a
Jul 11, 2018· The eutectic NaNO 3-KNO 3 mixture has the chemical composition Na 0.5 K 0.5 NO 3. Due to the lower mass of Na, this corresponds to a 45.67% NaNO 3 –54.33% KNO 3 weight percentage composition. The "solar salt" mixture has a higher content of Na, with a chemical composition of Na 0.641 K 0.359 NO 3 and a weight percentage of 60% NaNO 3 ...
which is a key factor in solar thermal power plant and make it broad range operating heat transfer fluid. Keywords: Eutectic, Nano Heat Transfer Fluid, Specific Heat Capacity, Concentrated Solar Power 1. Introduction Energy is an ultimate irreducible essence of the universe without which life cannot be imagined but today world is
Nov 23, 2019· To prepare the ternary mixtures, pure NaNO 3 (CAS 7631-99-4), KNO 3 (CAS 7757-79-1), and NaNO 2 (CAS 7632-00-0) (Sigma Aldrich), all analytical grade, were heated in a flask up to ~ 320 °C, i.e., above the melting temperature of each component. After adequate stirring, the salts were poured out on an alumina sheet and cooled down. Afterwards, they were powdered inside a mortar.
The eutectic mixture is the specific composition of at least two solid components that produces a change of phase to liquid at a certain temperature. This temperature receives the name of eutectic point temperature and corresponds to the minimum melting temperature of the different possible compositions. 3 Thus, the melting point of pure components (A or B) is higher than that of the eutectic ...
A low-melting point, heat transfer fluid comprising a mixture of LiNO 3, NaNO 3, KNO 3, NaNO 2 and KNO 2 salts where the Li, Na and K cations are present in amounts of about 20-33.5 mol % Li, about 18.6-40 mol % Na, and about 40-50.3 mol % K and where the nitrate and nitrite anions are present in amounts of about 36-50 mol % NO 3, and about 50-62.5 mol % NO 2 .
It does shows,who said that eutectic compositions doesn't shows CORING defects but it does . Because coring occurs in the Alloys and solid solutions when the alloys have been heated to certain temperature at equilibrium point and cools starts at ...
Jun 11, 2013· Previous work has shown the ternary compositions of LiNO 3 –NaNO 3 –KNO 3 salts offer the widest possible temperature range for use in a CSP system. The present work contains data for the viscosity, specific heat, and latent heat of some mixtures of these salts at various temperatures, providing vital information for plant designers to ...
The salts were dried Thermal Conductivity of the Molten NaNO~-KNO 3 Eutectic 587 under vacuum at 473 K for several hours. The eutectic was prepared gravimetrically with a composition of 54.00 tool % KNO 3. 5. VALIDATION In order to verify that the apparatus worked as expected, the thermal conductivity of water was measured.