kinetics and temperature dependent moisture diffusivities

Mathematical Modelling of Thin Layer Drying of Salak

Thin layer drying kinetics of salak (Salacca edulis) in hot air drying was investigated for temperature range of 50 to 80C Salak fruits were prepared in two forms slices with membrane layer and slices without membrane layer on surface A mathematical model was determined to describe the moisture reduction process during isothermal drying

Study of drying kinetics and quality attributes of

Corn grains were fermented for three days and later drained and dried at 600C 650C and 700C and air velocity of 1 37 1 82 and 2 32 m/s in a convective hot air dryer Kinetics of drying was investigated using Fick's second law The dried samples were milled and analyzed for proximate (moisture protein fat ash fibre and carbohydrtes) and physico-chemical properties (water absorption

An analytical method for determining the temperature

This paper presents an analytical method which determines the moisture diffusion coefficients for the natural and forced convection hot air drying of pumpkin seeds and their temperature dependence In order to obtain scientific data the pumpkin seed drying process was investigated under both natural and forced hot air convection regimes

Aluminum Oxide

2016-7-29Aluminum Oxide Al 2 O 3 Ceramic Properties Alumina is one of the most cost effective and widely used material in the family of engineering ceramics The raw materials from which this high performance technical grade ceramic is made are readily available and reasonably priced resulting in good value for the cost in fabricated alumina shapes

DRYING KINETICS OF TWO YAM (Dioscorea alata)

ABSTRACT: The aim of this research was the evaluation of the kinetics and the drying conditions at laboratory scale of two yam varieties (D alata 9506-021 and 9506-027) from the germplasm bank of the University of Cordoba (Colombia) Two geometries (circular and square) were used for the study the air temperature ranged from 40 to 70 C and the air speed was 0 7 m s-1

Kinetics of spouted

2010-2-1As published data on the drying characteristics of barley grain commercially produced in Europe is scant the objectives of this research were: (1) to observe the drying kinetics of barley dried in a spouted-bed drier (2) to estimate the diffusion coefficient of barley as dependent on moisture content and temperature of grain and (3) to study

Kasetsart University

Effective moisture diffusivities of pumpkin seeds determined by applying Fick's second law of diffusion and the method of slope ranged between 7 69 ? 10-11 and 50 96 ? 10-11 m2/s The temperature dependence of the effective moisture diffusivity followed an Arrhenius relationship with the activation energies between 15 and 62 12 kJ/mol

Comparison of safflower oil extraction kinetics under

A comparison of the parameters showed that both the portion extracted in the washing phase and the effective diffusion coefficient were moisture-dependent The effective diffusivities were 2 81 10-12 and 8 06 10-13 m 2 s-1 for moisture contents of 7% and 9% respectively Keywords: Effective-diffusion coefficients Extraction kinetics Safflower

Modeling and Investigation of the Swelling Kinetics of

The acrylamide-sodium acrylate hydrogel was synthesized by free radical polymerization of the method of solution polymerization Dynamic swelling tests were conducted at 25 40 and 60C temperatures in order to investigate the swelling properties of the synthesized hydrogel The results have shown that swelling content and swelling rate of the hydrogel increase with increasing the swelling

WO2013192435A1

Adsorbent compositions useful in adsorption and separation processes are made using silicone-derived binding agents The adsorbent compositions are made from crystallite aluminosilicate particles bound with silicone-derived binding agents and optionally small amounts of a clay binder to form agglomerated crystallite particles and are calcined to volatilize the organic components associated

Drying kinetics of banana (Musa spp )/Cinetica del

2015-6-1Drying kinetics of banana (Musa spp )/Cinetica del secado de bananas (Musa spp )/Cinetica da secagem de bananas (Musa spp ) Link/Page Citation Banana (Musa spp ) is a major fruit crop in the tropics and subtropics and it makes a vital contribution to the economies of many countries

Effect of Microwave Power and Sample Thickness on

2020-7-5Elephant foot yam was dried under different microwave power ranging from 180 W to 900 W and sample thickness (5-15 mm) to study their effect on microwave drying kinetics Drying time drying rate kinetic rate constant effective moisture diffusivity and rehydration ratio are various factors studied Increase in microwave power and decrease in sample thickness increased drying rate and

Non

62 A moisture balance equation expressed with temperature and moisture content as dependent variables is rare in Building Physics For constitutive relationships definition however some authors choose a hybrid method where liquid flux is originally expressed as dependent on the moisture content gradient and vapor flux on vapor pressure

Equilibrium Moisture and Drying Kinetics Modelling of

Algae-based products have applications in the food and pharmaceutical industries bioremediation of waste streams and biofuel production Drying has been recognised to constitute the largest energy cost in algae processing yet there is limited data or modelling characterising the drying kinetics of macroalgae This research modelled the equilibrium moisture content of two macroalgae species

Modeling Of Superheated Steam Drying Of Wood Particles

2020-1-16of drying model is developed The moisture diffusivity in the wood particles is determined from an inverse analysis whereas other thermo-physical properties are measured Two types of effective diffusivities including moisture-dependent effective diffusivity and temperature-dependent effective diffusivity are used to describe the

Search Result

Effect of air temperature and velocity on moisture diffusivity in relation to physical and sensory quality of dried pumpkin seeds ผู้แต่ง: (ชื่ออังกฤษ : Kinetics and Temperature Dependent Moisture Diffusivities of Pumpkin Seeds During Drying)

Modeling and Investigation of the Swelling Kinetics of

The acrylamide-sodium acrylate hydrogel was synthesized by free radical polymerization of the method of solution polymerization Dynamic swelling tests were conducted at 25 40 and 60C temperatures in order to investigate the swelling properties of the synthesized hydrogel The results have shown that swelling content and swelling rate of the hydrogel increase with increasing the swelling

KINETICS AND THERMODYNAMIC PROPERTIES OF

2018-5-14The selection of one particular drying method above another is dependent on its ability to produce a shelf stable product as optimizing quality and cost Drying of food material depends upon heat and mass transfer characteristics of the product being dried Knowledge of temperature and moisture distribution in the product

Glossary of Atmospheric Chemistry

2017-7-24Kinetics chemical reaction: The study of the rates at which reactions occur the influence of conditions (such as temperature concentration of reactants surface/volume ratio etc ) on these rates and the determination of rate coefficients

Studies on Kinetics of Moisture Removal from Spinach

2014-1-18Studies on Kinetics of Moisture Removal from Spinach Leaves 305 mean of the effective moisture diffusivities that were estimated at various levels of Fig 1: Temperature dependent moisture ratio vs drying time (A) and drying rate vs drying time (B) curve

Aluminum Oxide

2016-7-29Aluminum Oxide Al 2 O 3 Ceramic Properties Alumina is one of the most cost effective and widely used material in the family of engineering ceramics The raw materials from which this high performance technical grade ceramic is made are readily available and reasonably priced resulting in good value for the cost in fabricated alumina shapes

Mathematical modeling for the annatto (Bixa orellana

Chilean Journal of Agricultural Research 73 (3) July - September 2013 SCIENTIFIC NOTE Mathematical modeling for the annatto (Bixa orellana L ) seed drying processDyego da Costa Santos 1 * Alexandre Jos de Melo Queiroz 1 Rossana Maria Feitosa de Figueirdo 1 and Emanuel Neto Alves de Oliveira 1 1 Universidade Federal de Campina Grande Unidade Acadmica de Engenharia Agrcola

DRYING KINETICS OF TWO YAM (Dioscorea alata)

ABSTRACT: The aim of this research was the evaluation of the kinetics and the drying conditions at laboratory scale of two yam varieties (D alata 9506-021 and 9506-027) from the germplasm bank of the University of Cordoba (Colombia) Two geometries (circular and square) were used for the study the air temperature ranged from 40 to 70 C and the air speed was 0 7 m s-1

Microwave

2018-5-7Drying extends the shelf life of vegetable products during storage as well as reduces transportation costs from the decreased product weight Vegetables have high moisture contents which require long drying times making the process expensive and nutritionally destructive This project will define the governing physical parameters during vegetable drying to optimize the process

MOISTURE LOSS KINETICS OF APPLE DURING

2018-6-28velocity) The effective moisture diffusivities obtained were in the range of reported values and were found to be temperature dependent according to the Arrhenius relationship How-ever the prediction of moisture loss obtained from Fick's diffusion model failed to

The Rate of Drying of Solid Materials

2002-5-1High-temperature drying behavior and kinetics of lignite tested by the micro fluidization analytical method Drying kinetics and effective water diffusivities in olive stone and olive-tree pruning A diffusion model for describing water transport in round squid mantle during drying with a moisture-dependent effective diffusivity