The effect of additives on the speed of the crystallization front of xylitol with various degrees of supercooling

Seppälä, Ari; Meriläinen, Arttu; Wikström, Lisa; Kauranen, Pertti

doi:10.1016/j.expthermflusci.2009.11.005

Cited by 44 publications

(24 citation statements)

References 6 publications

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“…The crystallization rate at that temperature is 10.6 mm/h. The crystallization rates for xylitol agree with the data published in the literature [28].…”

Section: Crystallization Behavior Of the Pure Compoundssupporting

confidence: 86%

Eutectic mixtures of sugar alcohols for thermal energy storage in the 50–90°C temperature range

Diarce

Gandarias

Campos-Celador

et al. 2015

Solar Energy Materials and Solar Cells

131

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“…The crystallization rate at that temperature is 10.6 mm/h. The crystallization rates for xylitol agree with the data published in the literature [28].…”

Section: Crystallization Behavior Of the Pure Compoundssupporting

confidence: 86%

Eutectic mixtures of sugar alcohols for thermal energy storage in the 50–90°C temperature range

Diarce

Gandarias

Campos-Celador

et al. 2015

Solar Energy Materials and Solar Cells

131

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“…Xylitol supercools easily and may retain the supercooled state for a long period of time. 27 Neither the studied bulk xylitol nor the xylitolpolystyrene composite crystallized spontaneously only by cooling the sample at most to -50 °C in the DSC experiments. Therefore, only the first melting peak of the PCM was observed in the measurements.…”

Section: Thermal Properties Of Xylitol and Xylitol-polystyrene Compositementioning

confidence: 99%

“…Erythritol crystallizes spontaneously when sufficiently cooled [23][24][25] , whereas many other polyols, such as xylitol, are remarkably stable in the supercooled state and thus are difficult to crystallize spontaneously only by cooling the sample. 26,27 Lower supercooling degree of erythritol can be understood by similarities of the most stable crystalline and melt erythritol conformers; both possess straight backbone conformations. 23 Main thermal properties of bulk erythritol are presented in Table 2.…”

Section: Thermal Properties Of Erythritol and Erythritol-polystyrene mentioning

confidence: 99%

Novel microstructured polyol–polystyrene composites for seasonal heat storage

et al. 2016

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We propose a robust route to prepare supercooling microstructured phase change materials (PCMs) suitable for long-term heat storage or thermal protection applications. The new preparation method is based on polymerization of high internal phase emulsion (HIPE). Two promising polyols, erythritol and xylitol, are successfully prepared as new type microencapsulated PCM-polystyrene composites with PCM mass fractions of 62w-% and 67 w-%, respectively, and average void diameter of ~50 µm. Thermal properties of polyol-polystyrene composites and bulk polyols are studied thoroughly with differential scanning calorimetry (DSC). Microscale engineering has a significant impact on the thermal properties of polyols. Crystallization of the microscale erythritol is accelerated as compared to the crystallization of bulk PCM due to high fraction of solid surfaces in the polymer-polyol composites. Furthermore, crystallization properties of the microstructured erythritol are preserved similar in the cycling experiments. Crystallization of the bulk erythritol is found to strongly depend on the cooling rate, thermal history of the sample and surface roughness of the crucible, whereas these factors have only little impact on the crystallization of microstructured erythritol. In addition, microstructured polyolpolystyrene composites show anomalous enhancement in the specific heat as compared to bulk polyols. This enhancement may be originated from the strong polyol-surfactant interactions occurring in the composites.

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“…For instance, Heikkilä and co-workers (26) reported xylitol crystallization from solutions containing 97 g (11.4 g/100 g), 170 g (19.5 g/100 g) and 185 g (20.9 g/100 g) of xylitol, which were previously prepared by hydrogenation of a material containing per 100 g of solution: 94.2 g To accelerate crystallization, several additives were tested as seeds (15,19) using different organic solvents such as methanol, acetone, ethanol, methanol-water and ethanol-water mixtures (13,15,30,31), and their effects on latent heat, melting temperature, and long-term durability of the supercooled state assessed (13,15). concentration was only thrice that at 60% (v/v), it is likely that crystal size depends on ethanol concentration and temperature, with larger crystals formed at lower ethanol levels.…”

Section: Crystallization Of Xylitol Produced By Chemical Routesmentioning

confidence: 99%

Strategies for xylitol purification and crystallization: A Review

Martínez

Canettieri

Bispo

et al. 2015

Separation Science and Technology

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This paper reviews the literature on the main aspects of purification and crystallization of xylitol produced either by chemical or biotechnological routes. Different strategies have been used to clarify media containing xylitol: activated charcoal, pH adjustment, ion-exchange resins, membrane separation, chromatographic methods, liquid-liquid extraction and precipitation, or a combination of these techniques. This study explores the most recent results of research-work carried out in this field as well as the main approaches to recover and crystallize xylitol in a pure form. The effects of impurities, temperature, supersaturation, crystal seed amount, and size on xylitol crystal growth are also discussed. Downloaded by [Michigan State University] at 08:45 01 April 2015 A c c e p t e d M a n u s c r i p t 2

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The effect of additives on the speed of the crystallization front of xylitol with various degrees of supercooling

Cited by 44 publications

References 6 publications

Eutectic mixtures of sugar alcohols for thermal energy storage in the 50–90°C temperature range

Eutectic mixtures of sugar alcohols for thermal energy storage in the 50–90°C temperature range

Novel microstructured polyol–polystyrene composites for seasonal heat storage

Strategies for xylitol purification and crystallization: A Review

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