The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Mohammad Kazemeini - One of the best experts on this subject based on the ideXlab platform.
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Moisture Diffusivity and shrinkage of broad beans during bulk drying in an inert medium fluidized bed dryer assisted by dielectric heating
Journal of Food Engineering, 2009Co-Authors: G Hashemi, Dariush Mowla, Mohammad KazemeiniAbstract:Abstract Drying behavior of broad beans ( Vicia faba ) was studied in a pilot scaled fluidized bed dryer with inert particles assisted by dielectric heating. The effective diffusion coefficient of Moisture transfer was determined by Fickian method at four different air drying temperatures of 35, 45, 55 and 65 °C. Correlations for Moisture Diffusivity as a function of Moisture content and temperature of the drying medium were developed. The values of Moisture Diffusivity were obtained within the range of 1.27 × 10 −9 –6.48 × 10 −9 m 2 /s and the activation energies for FBD and FBD + DE were found to be 27.71 and 17.10 kJ/mol, respectively. The shrinkage behavior of the broad beans was also investigated by considering the volume ratio of ( V / V O ) to be function of Moisture content alone and fitting a polynomial of the third order. The dielectric heating power was also found to be effective on the rate of drying.
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Moisture Diffusivity and shrinkage of broad beans during bulk drying in an inert medium fluidized bed dryer assisted by dielectric heating
Journal of Food Engineering, 2009Co-Authors: G Hashemi, Dariush Mowla, Mohammad KazemeiniAbstract:Abstract Drying behavior of broad beans ( Vicia faba ) was studied in a pilot scaled fluidized bed dryer with inert particles assisted by dielectric heating. The effective diffusion coefficient of Moisture transfer was determined by Fickian method at four different air drying temperatures of 35, 45, 55 and 65 °C. Correlations for Moisture Diffusivity as a function of Moisture content and temperature of the drying medium were developed. The values of Moisture Diffusivity were obtained within the range of 1.27 × 10 −9 –6.48 × 10 −9 m 2 /s and the activation energies for FBD and FBD + DE were found to be 27.71 and 17.10 kJ/mol, respectively. The shrinkage behavior of the broad beans was also investigated by considering the volume ratio of ( V / V O ) to be function of Moisture content alone and fitting a polynomial of the third order. The dielectric heating power was also found to be effective on the rate of drying.
Stefan Cenkowski - One of the best experts on this subject based on the ideXlab platform.
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modeling of effective Moisture Diffusivity and activation energy of distillers spent grain pellets with solubles during superheated steam drying
Biomass & Bioenergy, 2018Co-Authors: Rani Puthukulangara Ramachandran, Jitendra Paliwal, Stefan CenkowskiAbstract:Abstract Drying is an essential unit operation needed for safe storage and handling of the wet Distillers' spent grain (DSG), a major by-product of the ethanol industry. For the simulation and modeling of the drying process, a detailed study on different pre-requisite parameters such as the thermo-physical properties and effective Moisture Diffusivity of the material to be dried is required. The present study reports the effective Moisture Diffusivity and activation energy of the DSG pellets during superheated steam (SS) drying. Cylindrical DSG pellets at two Moisture mass fractions (25 and 35%) and three mass fractions of distillers' solubles (0, 10, and 30%) were dried at three SS temperatures (120, 135, 150, 165, and 180 °C) and three SS velocities (0.5, 1.0, and 1.5 m/s), respectively. The experiment-based Moisture Diffusivity of the DSG pellet with and without solubles was determined by using the drying characteristic and the analytical solution of Fick's law of diffusion. The results showed that the effective Diffusivity increased with an increase in SS temperature and velocity and its value was in the range of 2.49 × 10 −9 to 17.9 × 10 −9 m 2 /s. The dependency of the Moisture Diffusivity on temperature and Moisture mass fraction was established by using Arrhenius equation and Levenberg-Marquardt optimization algorithm. The model coefficient and constants were compared with the calculated values of instantaneous effective Moisture Diffusivity with the mean relative percentage deviation ≤10%. These findings could serve as a fundamental input for the numerical modeling of SS drying of DSG.
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drying characteristics and Moisture Diffusivity of distillers spent grains dried in superheated steam
Drying Technology, 2015Co-Authors: Justin Bourassa, Rani Puthukulangara Ramachandran, Jitendra Paliwal, Stefan CenkowskiAbstract:Distillers' spent grain pellets were prepared from material with an initial Moisture content of 25% (wb). These pellets were dried in pairs using superheated steam at 120°C in two orientations, horizontal and vertical. The drying characteristics, modeled by the Page equation, showed that there was a significant difference between orientations. The overall Moisture Diffusivity was calculated using a finite cylinder model based on Fick's law of diffusion accounting for a change in dimensions over the course of drying. The overall Diffusivity values ranged from 4.08 × 10−10 to 1.48 × 10−8 m2/s.
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superheated steam drying characteristic and Moisture Diffusivity of distillers wet grains and condensed distillers solubles
Journal of Food Engineering, 2012Co-Authors: Magdalena Zielinska, Stefan CenkowskiAbstract:Abstract Samples of distillers’ spent grains were prepared by blending different proportions of distillers’ wet grains (DWG) with condensed distillers’ solubles (CDS). Such samples when dried with superheated steam (SS) at 110, 130 and 160 °C showed typical behaviour of drying in the falling rate period. The overall Moisture Diffusivity ( D m ) increased with a decrease in Moisture content under all drying conditions. An increase in Moisture Diffusivity with respect to the SS temperature was also observed. For all drying conditions, the values of average diffusivities ( D m ) avg non-corrected for shrinkage ranged from 0.52 × 10 −9 to 3.08 × 10 −9 m 2 /s. For distillers’ spent grains of different ratios of DWG to CDS, the decrease in SS temperature from 160 to 110 °C caused a decrease in ( D m ) avg by 69–82%. Increasing the amount of CDS added to the DWG from 0% to 100% caused an increase in ( D m ) avg by 14–35% for the temperature range tested in this study. The values of ( D m ) avg corrected for shrinkage ranged from 0.17 × 10 −9 to 0.86 × 10 −9 m 2 /s for all drying conditions studied. The decrease in SS temperature from 160 to 110 °C caused a decrease in ( D m ) avg by 70–74%. Not much differences were observed for the same drying temperatures and different ratios of DWG to CDS. The differences between the values of average overall Moisture Diffusivity ( D m ) avg corrected and non-corrected for shrinkage were significant, nearly one order of magnitude.
G Hashemi - One of the best experts on this subject based on the ideXlab platform.
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Moisture Diffusivity and shrinkage of broad beans during bulk drying in an inert medium fluidized bed dryer assisted by dielectric heating
Journal of Food Engineering, 2009Co-Authors: G Hashemi, Dariush Mowla, Mohammad KazemeiniAbstract:Abstract Drying behavior of broad beans ( Vicia faba ) was studied in a pilot scaled fluidized bed dryer with inert particles assisted by dielectric heating. The effective diffusion coefficient of Moisture transfer was determined by Fickian method at four different air drying temperatures of 35, 45, 55 and 65 °C. Correlations for Moisture Diffusivity as a function of Moisture content and temperature of the drying medium were developed. The values of Moisture Diffusivity were obtained within the range of 1.27 × 10 −9 –6.48 × 10 −9 m 2 /s and the activation energies for FBD and FBD + DE were found to be 27.71 and 17.10 kJ/mol, respectively. The shrinkage behavior of the broad beans was also investigated by considering the volume ratio of ( V / V O ) to be function of Moisture content alone and fitting a polynomial of the third order. The dielectric heating power was also found to be effective on the rate of drying.
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Moisture Diffusivity and shrinkage of broad beans during bulk drying in an inert medium fluidized bed dryer assisted by dielectric heating
Journal of Food Engineering, 2009Co-Authors: G Hashemi, Dariush Mowla, Mohammad KazemeiniAbstract:Abstract Drying behavior of broad beans ( Vicia faba ) was studied in a pilot scaled fluidized bed dryer with inert particles assisted by dielectric heating. The effective diffusion coefficient of Moisture transfer was determined by Fickian method at four different air drying temperatures of 35, 45, 55 and 65 °C. Correlations for Moisture Diffusivity as a function of Moisture content and temperature of the drying medium were developed. The values of Moisture Diffusivity were obtained within the range of 1.27 × 10 −9 –6.48 × 10 −9 m 2 /s and the activation energies for FBD and FBD + DE were found to be 27.71 and 17.10 kJ/mol, respectively. The shrinkage behavior of the broad beans was also investigated by considering the volume ratio of ( V / V O ) to be function of Moisture content alone and fitting a polynomial of the third order. The dielectric heating power was also found to be effective on the rate of drying.
Karina Di Scala - One of the best experts on this subject based on the ideXlab platform.
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effective Moisture Diffusivity determination and mathematical modelling of the drying curves of the olive waste cake
Bioresource Technology, 2010Co-Authors: Antonio Vegagalvez, Margarita Miranda, Luis Puente Diaz, Lorena Lopez, Katia Rodriguez, Karina Di ScalaAbstract:Abstract Olive cake is an important agro industrial by-product with the dried cake being the input material of many applications areas. In this research, the drying kinetics of olive cake during convective dehydration at five temperatures (50, 60, 70, 80 and 90 °C) was investigated. Several empirical mathematical models were selected to describe experimental drying kinetics data, namely, Page, Modified Page, Henderson and Pabis, Modified Henderson and Pabis, Two-Terms, Logarithmic and Weibull. Air temperature showed a significant effect on drying rates. Based on the statistical tests results (sum squared errors, chi-square and correlation coefficients), the Modified Henderson and Pabis equation is the most suitable model to describe the experimental drying curves. Effective Moisture Diffusivity of olive cake was in the range of 2.03 × 10 −9 –1.71 × 10 −9 m 2 s −1 . An activation energy value of 12.43 kJ mol −1 was determined. The findings allow the successful simulation of olive cake drying between 50 and 90 °C.
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Effective Moisture Diffusivity determination and mathematical modelling of the drying curves of the olive-waste cake.
Bioresource technology, 2010Co-Authors: Antonio Vega-gálvez, Margarita Miranda, Luis Puente Diaz, Katia Rodriguez, Lorena A. López, Karina Di ScalaAbstract:Olive cake is an important agro industrial by-product with the dried cake being the input material of many applications areas. In this research, the drying kinetics of olive cake during convective dehydration at five temperatures (50, 60, 70, 80 and 90 degrees C) was investigated. Several empirical mathematical models were selected to describe experimental drying kinetics data, namely, Page, Modified Page, Henderson and Pabis, Modified Henderson and Pabis, Two-Terms, Logarithmic and Weibull. Air temperature showed a significant effect on drying rates. Based on the statistical tests results (sum squared errors, chi-square and correlation coefficients), the Modified Henderson and Pabis equation is the most suitable model to describe the experimental drying curves. Effective Moisture Diffusivity of olive cake was in the range of 2.03x10(-9)-1.71x10(-9) m(2) s(-1). An activation energy value of 12.43 kJ mol(-1) was determined. The findings allow the successful simulation of olive cake drying between 50 and 90 degrees C.
Dariush Mowla - One of the best experts on this subject based on the ideXlab platform.
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Moisture Diffusivity and shrinkage of broad beans during bulk drying in an inert medium fluidized bed dryer assisted by dielectric heating
Journal of Food Engineering, 2009Co-Authors: G Hashemi, Dariush Mowla, Mohammad KazemeiniAbstract:Abstract Drying behavior of broad beans ( Vicia faba ) was studied in a pilot scaled fluidized bed dryer with inert particles assisted by dielectric heating. The effective diffusion coefficient of Moisture transfer was determined by Fickian method at four different air drying temperatures of 35, 45, 55 and 65 °C. Correlations for Moisture Diffusivity as a function of Moisture content and temperature of the drying medium were developed. The values of Moisture Diffusivity were obtained within the range of 1.27 × 10 −9 –6.48 × 10 −9 m 2 /s and the activation energies for FBD and FBD + DE were found to be 27.71 and 17.10 kJ/mol, respectively. The shrinkage behavior of the broad beans was also investigated by considering the volume ratio of ( V / V O ) to be function of Moisture content alone and fitting a polynomial of the third order. The dielectric heating power was also found to be effective on the rate of drying.
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Moisture Diffusivity and shrinkage of broad beans during bulk drying in an inert medium fluidized bed dryer assisted by dielectric heating
Journal of Food Engineering, 2009Co-Authors: G Hashemi, Dariush Mowla, Mohammad KazemeiniAbstract:Abstract Drying behavior of broad beans ( Vicia faba ) was studied in a pilot scaled fluidized bed dryer with inert particles assisted by dielectric heating. The effective diffusion coefficient of Moisture transfer was determined by Fickian method at four different air drying temperatures of 35, 45, 55 and 65 °C. Correlations for Moisture Diffusivity as a function of Moisture content and temperature of the drying medium were developed. The values of Moisture Diffusivity were obtained within the range of 1.27 × 10 −9 –6.48 × 10 −9 m 2 /s and the activation energies for FBD and FBD + DE were found to be 27.71 and 17.10 kJ/mol, respectively. The shrinkage behavior of the broad beans was also investigated by considering the volume ratio of ( V / V O ) to be function of Moisture content alone and fitting a polynomial of the third order. The dielectric heating power was also found to be effective on the rate of drying.