Analytical solution of coupled heat and mass transfer equations during convective drying of biomass: experimental validation

Koukouch, Abdelghani; Bakhattar, Ilias; Asbik, Mohamed; Idlimam, Ali; Zeghmati, Belkacem; Aharoune, A.

doi:10.1007/s00231-020-02817-w

Cited by 9 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned above the thermophysical properties of water are subject to the pressure and temperature. They were obtained from reference [27] while those of ROP were previously published [23].…”

Section: Resultsmentioning

confidence: 99%

“…This biomass, coming from a crushing unit located in Meknès region (Morocco), has an average particle size of 5 mm, and an initial humidity rate ranging between 30% and 40%. Also, it has been dried using an indirect forced convection solar dryer and then characterized [4,[21][22][23][24]. Table 1 summarizes ultimate and proximate analyses of the selected biomass.…”

Section: Methodsmentioning

confidence: 99%

“…Moving away from the inner lateral surface, Figure 6 reveals that there is an average temperature difference of 5 • C between both base surfaces (bottom and top surfaces). This fact can be explained by suspension particles [28,29] and their migration to the reactor top (Figure 9a-c) owing to their low bulk density [2] as well as their thermal conductivity [23] compared to those of water. Figure 5a-c and also Figure 6 prove that there are wide variations of temperature gradients in the vicinity of the vertical wall (r = R), while they become small far enough from it (Figure 6).…”

Section: Fluid Flow and Heat Transfer Analysismentioning

confidence: 99%

See 2 more Smart Citations

Analysis of Fluid Flow and Heat Transfer inside a Batch Reactor for Hydrothermal Carbonization Process of a Biomass

et al. 2022

Self Cite

View full text Add to dashboard Cite

This work analyzes the heat transfer and fluid flow within a batch reactor for hydrothermal carbonization (HTC) of raw olive pomace (ROP). The autoclave is partially filled with a mixture of ROP and distilled water and hence it is considered as a dispersed medium. The reactor is heated through its lateral surface, whereas the bottom wall and the upper surface of the mixture are thermally insulated. Under the effect of heat and pressure, the fluid moves inside the reactor, while particles are subject to other forces. Additionally, the biomass (ROP) is decomposed into very fine particles to produce a solid product (hydrochar). COMSOL Multiphysics software is used for the analysis of heat transfer and fluid dynamics. Chemical kinetics of the reactions are modeled by a basic kinetics model. Numerical results are validated using experimental data carried out in similar operating conditions. They are in good agreement since the deviation between them does not exceed 6%. Isotherms, velocity fields, and isobars are evaluated within the reactor as well as velocity and distribution of particles. These amounts are influenced by the imposed heat flux at the lateral wall (q0). Also, it has been shown that the temperature and pressure values reached are above those required by the HTC process and, consequently, a HTC reactor could be designed with optimal operating conditions.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Fluid Flow and Heat Transfer Analysismentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Fluid Flow and Heat Transfer inside a Batch Reactor for Hydrothermal Carbonization Process of a Biomass

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, the coefficient k summarizes the effect of temperature and other technological features of drying. Obviously, it is important for practice to know the influence of each factor on the drying process [1,[22][23][24][25]. However, this is a difficult task.…”

Section: Influence Of Drying Temperaturementioning

confidence: 99%

“…In models of drying a material in a thin layer, it is assumed that the temperature and moisture content of the material almost does not change over its thickness. If these changes are significant, then more complex models based on differential equations in partial derivatives are used [8,13,[22][23][24][25] and numerical modeling [26,27]. To get an idea of the adequacy of model (28) from a physical point of view, it is necessary to compare it with experimental data.…”

Section: Influence Of Drying Temperaturementioning

confidence: 99%

Modeling the Drying of Capillary-Porous Materials in a Thin Layer: Application to the Estimation of Moisture Content in Thin-Walled Building Blocks

Kolesnikov

Gavrilov

2020

Applied Sciences

View full text Add to dashboard Cite

Drying, as a process of changing the moisture content and temperature of capillary-porous materials, is a necessary step in many technologies. When predicting moisture changes, it is necessary to find a balance between the complexity of a model and the accuracy of the simulation results. The purpose of this work was the development of a mathematical model for drying a capillary-porous material with direct consideration of its initial moisture content and drying temperature. Methods of mathematical modeling were used in the work. Using the developed model, an analysis of the features of the drying process of materials with high and low initial moisture content has been carried out. The analytical relationship for determining the time at which the extremum of the drying rate is reached has been substantiated. A model has been developed to directly take into account the influence of the initial material moisture content and drying temperature. The simulation results are consistent with the experiments on drying ceramic blocks for construction which are described in the literature. The obtained results can be taken into account in studies of the effect of drying modes on the energy consumption of a drying process.

show abstract

Thermodynamic analysis of batch adsorption isotherms of different types of olive pomace

et al. 2021

View full text Add to dashboard Cite

Analytical solution of coupled heat and mass transfer equations during convective drying of biomass: experimental validation

Cited by 9 publications

References 24 publications

Analysis of Fluid Flow and Heat Transfer inside a Batch Reactor for Hydrothermal Carbonization Process of a Biomass

Analysis of Fluid Flow and Heat Transfer inside a Batch Reactor for Hydrothermal Carbonization Process of a Biomass

Modeling the Drying of Capillary-Porous Materials in a Thin Layer: Application to the Estimation of Moisture Content in Thin-Walled Building Blocks

Thermodynamic analysis of batch adsorption isotherms of different types of olive pomace

Contact Info

Product

Resources

About