Enthalpies of solution and of crystallization of lithium nitrate and of lithium nitrate trihydrate in water at 25�C

1990 ◽  
Vol 19 (10) ◽  
pp. 1029-1039 ◽  
Author(s):  
G. Wolf ◽  
V. Vacek ◽  
V. Pekarek
Keyword(s):  
Lithium Nitrate ◽  
Enthalpies Of Solution ◽  
Nitrate Trihydrate

Cyclic stability of lithium nitrate trihydrate in plate fin heat exchangers

2020 ◽  
Vol 179 ◽  
pp. 115476
Author(s):  
Achutha Tamraparni ◽  
Patrick J. Shamberger ◽  
Jonathan R. Felts
Keyword(s):  
Heat Exchangers ◽  
Lithium Nitrate ◽  
Cyclic Stability ◽  
Nitrate Trihydrate

Towards High Energy Density, High Conductivity Thermal Energy Storage Composites

2012 ◽  
Author(s):  
Patrick J. Shamberger ◽  
Daniel E. Forero
Keyword(s):  
Thermal Conductivity ◽  
Energy Storage ◽  
Energy Density ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
High Energy ◽  
High Energy Density ◽  
Lithium Nitrate ◽  
Nitrate Trihydrate ◽  
Graphitic Foam

Thermal energy storage (TES) materials absorb transient pulses of heat, allowing for rapid storage of low-quality thermal energy for later use, and effective temperature regulation as part of a thermal management system. This paper describes recent development of salt hydrate-based TES composites at the Air Force Research Laboratory. Salt hydrates are known to be susceptible to undercooling and chemical segregation, and their bulk thermal conductivities remain too low for rapid heat transfer. Here, we discuss recent progress towards solving these challenges in the composite system lithium nitrate trihydrate/graphitic foam. This system takes advantage of both the high volumetric thermal energy storage density of lithium nitrate trihydrate and the high thermal conductivity of graphitic foams. We demonstrate a new stable nucleation agent specific to lithium nitrate trihydrate which decreases undercooling by up to ∼70% relative to previously described nucleation agents. Furthermore, we demonstrate the compatibility of lithium nitrate trihydrate and graphitic foam with the addition of a commercial nonionic silicone polyether surfactant. Finally, we show that thermal conductivity across water-graphite interfaces is optimized by tuning the surfactant concentration. These advances demonstrate a promising route to synthesizing high energy density, high thermal conductivity TES composites.

Bifurcated Hydrogen Bond in Lithium Nitrate Trihydrate Probed by ab Initio Molecular Dynamics

2012 ◽  
Vol 116 (9) ◽  
pp. 2147-2153 ◽  
Author(s):  
Francesco Muniz-Miranda ◽  
Marco Pagliai ◽  
Gianni Cardini ◽  
Roberto Righini
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Bond ◽  
Ab Initio ◽  
Ab Initio Molecular Dynamics ◽  
Lithium Nitrate ◽  
Nitrate Trihydrate ◽  
Bifurcated Hydrogen Bond

Dynamics of Weak, Bifurcated, and Strong Hydrogen Bonds in Lithium Nitrate Trihydrate

2011 ◽  
Vol 2 (13) ◽  
pp. 1633-1638 ◽  
Author(s):  
Jasper C. Werhahn ◽  
Stanislav Pandelov ◽  
Sotiris S. Xantheas ◽  
Hristo Iglev
Keyword(s):  
Hydrogen Bonds ◽  
Lithium Nitrate ◽  
Nitrate Trihydrate

A temperature-responsive poly(vinyl alcohol) gel for controlling fluidity of an inorganic phase change material

2017 ◽  
Vol 5 (24) ◽  
pp. 12474-12482 ◽  
Author(s):  
Parvin Karimineghlani ◽  
Emily Emmons ◽  
Micah J. Green ◽  
Patrick Shamberger ◽  
Svetlana A. Sukhishvili
Keyword(s):  
Heat Exchange ◽  
Phase Change ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Lithium Nitrate ◽  
Temperature Responsive ◽  
Nitrate Trihydrate ◽  
Pva Gel ◽  
Response To Temperature ◽  
Change Material

A temperature-responsive PVA gel is achieved that reversibly holds fluid lithium nitrate trihydrate and releases it in response to temperature for easy gelling in-place and later removal from heat-exchange modules.

Heats of Solution of Some Sodium and Potassium Salts in Water and in Water-Methanol Mixtures

1992 ◽  
Vol 57 (11) ◽  
pp. 2227-2234 ◽  
Author(s):  
Ján Benko ◽  
Oľga Vollárová
Keyword(s):  
Transfer Functions ◽  
Enthalpies Of Solution ◽  
Potassium Salts ◽  
Solvent Interactions ◽  
Heats Of Solution ◽  
Solvent Molecules ◽  
Sodium And Potassium

The enthalpies of solution ∆Hs0 were determined for NaSCN, KSCN, NaBrO3, KBrO3, NaClO3, KClO3, NaIO4, KMnO4, KNO2 and NaNO2 in water-methanol mixtures. The transfer functions ∆Ht0 of the salts and anions were calculated based on the extrathermodynamic TPTB assumption. The ∆Ht0 values of the anion obtained from the sodium and potassium salts were compared. The differences observed, particularly at higher concentrations of the cosolvent, are discussed with respect to the interactions between the solvent molecules and the solute-solvent interactions.

scholarly journals Monitoring of the Impact of Lithium Nitrate on the Alkali–aggregate Reaction Using Acoustic Emission Methods

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 20
Author(s):  
Justyna Zapała-Sławeta ◽  
Grzegorz Świt
Keyword(s):  
Acoustic Emission ◽  
Initial Reaction ◽  
Lithium Nitrate ◽  
Acoustic Emission Method ◽  
Emission Method ◽  
Acoustic Activity ◽  
Initial Stage ◽  
Chemical Admixture ◽  
Different Characteristics ◽  
The Impact

The study analyzed the possibility of using the acoustic emission method to analyse the reaction of alkali with aggregate in the presence of lithium nitrate. Lithium nitrate is a chemical admixture used to reduce adverse effects of corrosion. The tests were carried out using mortars with reactive opal aggregate, stored under the conditions defined by ASTM C227. The acoustic activity of mortars with a corrosion inhibitor was referred to linear changes and microstructure of specimens in the initial reaction stages. The study found a low acoustic activity of mortars with lithium nitrate. Analysis of characteristic parameters of acoustic emission signals, combined with the observation of changes in the microstructure, made it possible to describe the corrosion processes. As the reaction progressed, signals with different characteristics were recorded, indicating aggregate cracking at the initial stage of the reaction, followed by cracking of the cement paste. The results, which were referred to the acoustic activity of reference mortars, confirmed that the reaction of opal aggregate with alkali was mitigated in mortars with lithium nitrate, and the applied acoustic emission method enabled the detection and monitoring of ASR progress.

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