Kinetics of Dissolution and Recrystallization of Sodium Chloride at                    Controlled Relative Humidity

Langlet, Marina; Nadaud, Frederic; Bénali, Mohammed; Pezron, Isabelle; Saleh, Khashayar; Guigon, Pierre; Metlas-Komunjer, Léa

doi:10.14356/kona.2011019

Cited by 35 publications

(27 citation statements)

References 9 publications

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“…Research related to the kinetics of deliquescence has mainly focused on nucleation kinetics of aerosol particles and dissolution kinetics with a simplified model (Djikaev and Ruckenstein, 2006;Langlet et al, 2011;Russell and Ming, 2002) report here are those by Van Campen and Kontny (Kontny and Zografi, 1985;Van Campen et al, 1983a;Van Campen et al, 1983b, c). As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Sorbitol (So) was purchased from Amresco LLC (Solon, OH). These ingredients were selected to represent commonly used organic and inorganic powder deliquescent crystalline solids in the food and pharmaceutical industries, as well as to include compounds with both positive and negative heat of solution values (Lipasek et al, 2013). All powder ingredients were used as received from the manufacturer unless given a grinding treatment to reduce particle size, in which case they are identified as 'ground samples'.…”

Section: Methodsmentioning

confidence: 99%

“…For CAA, the RH 0 values decreased as temperature increased. Neither the solubility nor the RH 0 of NaCl is significantly affected by temperature, while increasing temperature increases the solubility of CAA leading to a decreased RH 0 (Lipasek et al, 2013).…”

Section: Effect Of Temperaturementioning

confidence: 95%

“…Deliquescence points: RH 0 and RH 0mix . Published deliquescence points have been determined experimentally by measuring moisture sorption isotherms of the solid and noting the point at which significant moisture sorption begins or by measuring the water activity of saturated solutions (Lipasek et al, 2013). In this study, RH 0 values were calculated from linear extrapolation of the moisture sorption rate line where W h 0 equals 0, the point at which deliquescence is about to occur (Fig.…”

Section: Determination Of Model Parametersmentioning

confidence: 99%

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Heat transport model for the deliquescence kinetics of crystalline ingredients and mixtures

Taylor

Mauer

2016

Journal of Food Engineering

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Effect Of Temperaturementioning

confidence: 95%

Section: Determination Of Model Parametersmentioning

confidence: 99%

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Heat transport model for the deliquescence kinetics of crystalline ingredients and mixtures

Taylor

Mauer

2016

Journal of Food Engineering

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“…The air filters are loaded under a range of RH values from 0-60% to represent low to medium RH conditions in real filter operations. The RH during loading remains below the deliquescence RH of NaCl, 75% (Hu et al 2010;Langlet et al 2011), for all experiments in this work. Filters may experience RH of 0-100% during real operating conditions.…”

Section: Experiments and Methodsmentioning

confidence: 93%

Impact of Relative Humidity on HVAC Filters Loaded with Hygroscopic and Non-Hygroscopic Particles

Montgomery

Green

Rogak

2015

Aerosol Science and Technology

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The key characteristics of an air filter-flow resistance and filtration efficiency-are strongly affected by captured particles. The impact of exposing loaded heating, ventilating, and air conditioning air filters to a relative humidity (RH) other than that experienced during loading is investigated to develop an understanding of the role of RH throughout filter operation. Flat sheets of commercial filter media were loaded with hygroscopic, non-hygroscopic, or a mixture of particles in a laboratory apparatus. When filters loaded with hygroscopic particles in dry air were exposed to an elevated RH of 40%, the flow resistance reduced by up to 47%, depending on the filter being tested. Investigation of filter efficiency before and after changes in RH in the same samples shows reductions of up to 11 percentage points in the 130-nm size range. Further increasing RH causes additional drops in flow resistance and efficiency whereas reverting back to a lower humidity does not change the filter characteristics. The irreversibility of the particle-loaded filter characteristics implies that the RH increases are associated with an irreversible change in the particle structure. The response to humidity was reduced if an aerosol mixture of hygroscopic and non-hygroscopic particles is used. Exposure of filters loaded with only non-hygroscopic particles does not show the same dependence on RH. Small increases in growth factor for RH changes below deliquescence, causing morphological changes in captured particle aggregates, is a potential explanation for the changes observed.

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Analysis of Non‐Isothermal Viscous Flow Coalescence at Micro Scale

et al. 2019

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The non‐isothermal coalescence of two spherical bodies caused by capillary‐induced viscous flow was analyzed. Based on this analysis, a new dimensionless number (K number) was introduced for defining thermal coalescence regimes. Based on the value of this number, coalescence may or may not be affected by thermal effects in different cases. To make this clearer, the conventional coalescence models of Frenkel‐Eshelby and Pokluda were modified by assuming viscosity as a temperature dependent variable. This was conducted by considering the effects of temperature on the viscosity of the involved material through evaluating different expressions including linear and Reynolds and Williams‐Landel‐Ferry (WLF) equations. The results of the modified models for the bridge growth rate show that temperature changes significantly affect the kinetics of coalescence, particularly when the characteristic times of coalescence and heat conduction are in the same order, i.e., moderate K numbers. This analysis is applicable for diverse situations since viscous flow coalescence occurs in various physical and industrial applications of particles or droplets.

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Kinetics of Dissolution and Recrystallization of Sodium Chloride at Controlled Relative Humidity

Abstract: Both producers and users of divided solids regularly face the problem of caking after periods of

Cited by 35 publications

References 9 publications

Heat transport model for the deliquescence kinetics of crystalline ingredients and mixtures

Heat transport model for the deliquescence kinetics of crystalline ingredients and mixtures

Impact of Relative Humidity on HVAC Filters Loaded with Hygroscopic and Non-Hygroscopic Particles

Analysis of Non‐Isothermal Viscous Flow Coalescence at Micro Scale

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