Thermal decomposition of sodium dithionite

Flaherty, B.; Bather, J. M.

doi:10.1002/jctb.5020210805

Cited by 4 publications

(1 citation statement)

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“…Such crystalline transition below the fusion temperature has typically been attributed to orthorhombic to hexagonal transitions in literature. [ 14 ] The cooling curve of ethyl cinnamate is spread out in its temperature range, with multiple sharp exotherms having very close crystallization peaks. This phenomenon happens when the different constituents of the sample solidify with individual degrees of supercooling (∆ T sup ).…”

Section: Resultsmentioning

confidence: 99%

How to Select Phase Change Materials for Tuning Condensation and Frosting?

Chatterjee

Chaudhari

Anand

2022

Adv Funct Materials

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Synthetic surfaces engineered to regulate phase transitions of matter and exercise control over its undesired accrual (liquid or solid) play a pivotal role in diverse industrial applications. Over the years, the design of repellant surfaces has transitioned from solely modifying the surface texture and chemistry to identifying novel material systems. In this study, selection criteria are established to identify bio-friendly phase change materials (PCMs) from an extensive library of vegetable-based/organic/essential oils that can thermally respond by harnessing the latent heat released during condensation and thereby delaying ice/frost formation in the very frigid ambient that is detrimental to its functionality. Concurrently, a comprehensive investigation is conducted to elucidate the relation between microscale heat transport phenomena during condensation and the resulting macroscopic effects (e.g., delayed droplet freezing) on various solidified PCMs as a function of their inherent thermo-mechanical properties. In addition, to freeze protection, many properties that are responsive to the thermal reflex of the surface, such as the ability to dynamically tune optical transparency, moisture harvesting, ice shedding, and quick in-field repairability, are achievable, resulting in the development of protective coatings capable of spanning a wide range of functionalities and thereby having a distinctive edge over conventional solutions.

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Section: Resultsmentioning

confidence: 99%

How to Select Phase Change Materials for Tuning Condensation and Frosting?

Chatterjee

Chaudhari

Anand

2022

Adv Funct Materials

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The non‐oxidative decomposition of heated sodium dithionite

Goodhead¹,

O'Neill²,

Wardleworth³

1974

J. Appl. Chem.

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The non-oxidative decomposition of heated sodium dithionite was shown by thermal and i.r. spectroscopic analyses to proceed by two routes depending on sample configuration. The previously postulated reaction 2Na2S204 --* NalS203 +NazSOJ + SO2 predominated when the heaped substance was heated at 16"C/min giving a sudden exotherm of 47 kJ mol-' at 205 "C. In other conditions, particularly when heated in thin layers, two exotherms were found. The major exothenn at 210 "C yielded 63 kJ mol-I the main products being thiosulphate, trithionate, sulphate and sulphite. A subsequent exotherm at 250 "C appeared to arise from phase changes in this material, coincident with the endothermic decomposition of sodium trithionate.

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