Thermal decomposition of supported lithium nitrate catalysts

Ruiz, María Lucía; Lick, Ileana Daniela; Ponzi, Marta I.; Castellón, Enrique Rodríguez; Jiménez‐López, Antonio; Ponzi, Esther N.

doi:10.1016/j.tca.2009.10.016

Cited by 47 publications

(61 citation statements)

References 14 publications

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“…As can be seen, the LiNO 3 salts started to melt at 251.77 C (curve (b)) and decompose at 320.83 C (curve (a)). Similar pattern was observed by Ruiz et al 22 They reported that the decomposition of LiNO 3 could turn into either Li 2 O at 650 C or lithium peroxide (Li 2 O 2 ) above 650 C, and both were accompanied by the release of nitrogen dioxide.…”

Section: Thermal Decompositions Of Lino 3 and Li-cgo Powderssupporting

confidence: 84%

“…24 Besides, all modied samples show the presence of anti-symmetric N-O vibration mode of free nitrate ions at 1347-1384 cm À1 and 828-850 cm À1 . 22,27,28 The intensity of these absorption bands decreased as the calcination temperature was increased up to 700 C. The disappearance of 1640 cm À1 absorption band for sample D-700 indicates the removal of water from the surface of the samples as the water vaporizes at high temperature. The sharp absorption band at 3564 cm À1 observed in D-700 is attributed to hydroxyl stretching vibration of Li-O-H. 29 Additionally, small shoulder absorption was also observed such as the band at 734-739 cm À1 which represents the vibrational stretching of lithium compound (Li-O).…”

Section: Effect Of Calcination Temperature On the Chemical Interactiomentioning

confidence: 97%

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Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

et al. 2015

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The incorporation of lithium oxide (Li 2 O) as a sintering additive has specific advantages for electrolyte membrane fabrication. However, the viability of the sintering additive to be implemented in a phase inversion technique is still ambiguous. In this first attempt, lithium was doped into a gadolinium-doped ceria (CGO) crystal structure using the metal nitrate doping method and calcined at four different temperatures, i.e. 140, 300, 500 and 700 C. The prepared Li-doped CGO (Li-CGO) powders were analyzed by thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), N 2 adsorption/desorption, and Fourier-transform infrared (FTIR). Primary results demonstrate that the calcination temperature of the Li-CGO influences the condition of the electrolyte suspension. Li-CGO calcined at 700 C (D-700), as compared with other Li-CGO, possessed a strong interaction between the Li and CGO. The D-700 was then incorporated into the electrolyte flat sheet membrane which was prepared by a phase inversion technique. The membrane was then sintered at different sintering temperatures from 1350 C to 1450 C. In comparison with the unmodified CGO, the morphological results suggest that the Li 2 O can remarkably promote the densification of CGO at a lower sintering temperature (1400 C). These findings help to promote the use of sintering additives in a ceriabased electrolyte suspension specifically for the phase inversion technique.

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Section: Thermal Decompositions Of Lino 3 and Li-cgo Powderssupporting

confidence: 84%

Section: Effect Of Calcination Temperature On the Chemical Interactiomentioning

confidence: 97%

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

et al. 2015

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“…Therefore, other types of lithium salts, such as Li 2 O 2 , LiOH, LiNO 3 , and Li 2 CO 3 should be considered as the lithium source. Among them, Li 2 O 2 , LiOH, and LiNO 3 decompose thermally to Li 2 O at temperatures below 600 °C2021. Therefore, we chose Li 2 CO 3 as the lithium source because it does not decompose thermally to Li 2 O in the temperature range of 630–640 °C (see Supporting Information Figure S2)22.…”

Section: Resultsmentioning

confidence: 99%

A study of the effects of synthesis conditions on Li5FeO4/carbon nanotube composites

Lee

Kim

et al. 2017

Sci Rep

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Li5FeO4/carbon nanotube (LFO/CNT) composites composed of sub-micron sized LFO and a nanocarbon with high electrical conductivity were successfully synthesized for the use as lithium ion predoping source in lithium ion cells. The phase of LFO in the composite was found to be very sensitive to the synthesis conditions, such as the heat treatment temperature, type of lithium salt, and physical state of the precursors (powder or pellet), due to the carbothermic reduction of Fe3O4 by CNTs during high temperature solid state reaction. Under optimized synthesis conditions, LFO/CNT composites could be synthesized without the formation of impurities. To the best of our knowledge, this is the first report on the synthesis and characterization of a sub-micron sized LFO/CNT composites.

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“…However, when we enter in to nano dimension, then the numbers of atoms exposed at the surface is extremely high as compared to the number of atoms in the bulk. The increase in the Cp of silica nanofluid may also be featured with a reduction of the vibrational frequencies and increase in the configurational Cp at surface and interfacial regions between liquid molecules and nanoparticles [31]. As we can imagine the bonds just analogous to springs -the result is that the surface atoms vibrate with lower natural frequency and higher amplitudes which means a very high surface energy.…”

Section: Specific Heat Capacity Analysis (Dsc Analysis)mentioning

confidence: 99%

“…As the atoms present at the surface have lesser number of bonds than that of atoms in the bulk and are less inhibited [6,9,19]. The increased interfacial thermal resistance provides extra thermal storage which appears in the form of increased specific heat capacity of the nanofluid [31][32][33][34][35][36][37]. So the phonon spectrum will quantized, it will transform from continuous to discrete value and that the Debye T 3 rule will not be applicable for nanomaterials [17,28].…”

Section: Specific Heat Capacity Analysis (Dsc Analysis)mentioning

confidence: 99%

Synthesis and Characterization of Nano Heat Transfer Fluid (NHTF)

Hussain

Saqlain²,

Siddiq³

2012

CNANO

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This paper describes a nano-heat transfer fluid (NHTF) consisting of a novel mixture of alkali metal nitrate salt eutectic doped with silica nanoparticles at 0.5% mass concentration with a low melting point, high thermal stability and high specific heat capacity. These properties produce a wide operating range Heat Transfer Fluid and enable effective thermal storage for parabolic trough concentrating solar power plants as compared to present molten salt heat transfer fluids that usually has a high melting point, typically 220°C or higher. This limits its use due to the risk of freezing. The advanced NHTF exploits eutectic behavior with a novel composition of materials and nanoparticles, resulting in a low melting point of 120 °C, a thermal stability limit over 500 °C and an increase in specific heat capacity owing to the presence of suspended silica nanoparticles.

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Thermal decomposition of supported lithium nitrate catalysts

Cited by 47 publications

References 14 publications

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

A study of the effects of synthesis conditions on Li5FeO4/carbon nanotube composites

Synthesis and Characterization of Nano Heat Transfer Fluid (NHTF)

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