José Freire

José Freire

Universidade Federal de São Carlos

H-index: 34

Latin America-Brazil

About José Freire

José Freire, With an exceptional h-index of 34 and a recent h-index of 22 (since 2020), a distinguished researcher at Universidade Federal de São Carlos, specializes in the field of Fenômenos de Transporte e Sistemas Particulados.

His recent articles reflect a diverse array of research interests and contributions to the field:

Effects of composition and pre-treatment on the physical and mechanical properties of pellets of orange juice waste

Production of MgAl/layered double hydroxide microspheres and investigation of the volumetric heat transfer coefficient in spray drying

SYSTEM DEVELOPMENT FOR MONITORING THE PRODUCTION PROCESS OF FREEZE-DRIED SAMPLES: A SIMPLE AND LOW-COST APPROACH: Original scientific paper

Effects of adherence in the drying of brewer’s spent grain with rotating equipment

Fluidization design parameters of agroindustrial residues for biomass applications: Experimental, theoretical, and neural networks approach

Effect of orange waste pretreatment on the fluid dynamics of spouted beds with mechanical agitation

Modelling and characterisation of jackfruit seeds drying using the diffusion theory considering shrinkage

Application of Clay-Biochar Composites as Adsorbents for Water Treatment

José Freire Information

University

Universidade Federal de São Carlos

Position

Professor Emérito da

Citations(all)

4280

Citations(since 2020)

1798

Cited By

3200

hIndex(all)

34

hIndex(since 2020)

22

i10Index(all)

120

i10Index(since 2020)

60

Email

University Profile Page

Universidade Federal de São Carlos

José Freire Skills & Research Interests

Fenômenos de Transporte e Sistemas Particulados

Top articles of José Freire

Effects of composition and pre-treatment on the physical and mechanical properties of pellets of orange juice waste

Authors

Guilherme Henrique Alves Pinto,Thalyne de Almeida Ferreira Rocha,Juan F Saldarriaga,José Teixeira Freire,Fábio Bentes Freire

Journal

Biomass Conversion and Biorefinery

Published Date

2024/4/22

Pelletization is an interesting alternative for homogenizing biomass, reducing, on the one hand, the emission of fine particulate material and, on the other hand, increasing the energy density of solid biofuels. However, the densification process of some biomasses may be inefficient, depending on their composition. This work analyzed different mixtures of compounds and different pre-treatments in the mechanical pressing pelletization of orange juice residues for different particle sizes. Experimental tests were carried out with water, starch, glucose, molasses, and coffee grounds as binders, with some tests subject to roasting pre-treatment at 180 °C in an oxidizing environment. The density and moisture content of the pellets were between 820 and 1315 kg/m³ and 10–16% (b.u.), respectively. Furthermore, the pellets were tested for resistance to mechanical impact, durability, and water absorption; the best results were …

Production of MgAl/layered double hydroxide microspheres and investigation of the volumetric heat transfer coefficient in spray drying

Authors

Luiz D Silva Neto,Lucas Meili,José T Freire

Journal

Heliyon

Published Date

2024/4/13

Layered Double Hydroxides (LDH) are synthetic materials nanostructured in two dimensions that present positively charged layers with interspersed anions for charge and structure balancing. Being recognized as a promising material for various applications, a complete exploration of its possible attractive properties and its synthesis process is essential. However, drying, a necessary step in the process, is still little studied. This work aimed to produce MgAl-CO3/LDH microspheres and calculate the volumetric heat coefficient in spray drying, evaluating the drying air inlet temperature and the concentration of the feed paste in the dryer. LDH synthesis was carried out using the coprecipitation method, maintaining a 2:1 Mg/Al ratio. The infrared spectra presented the bands characteristic of the hydrotalcite-type material. Through XRD, it was possible to observe that the variation in drying air temperature and feed paste …

SYSTEM DEVELOPMENT FOR MONITORING THE PRODUCTION PROCESS OF FREEZE-DRIED SAMPLES: A SIMPLE AND LOW-COST APPROACH: Original scientific paper

Authors

Vanessa Dal-Bó,Heitor Otacílio Nogueira Altino,José Teixeira Freire

Journal

Chemical Industry & Chemical Engineering Quarterly

Published Date

2024

The data acquisition from the freeze-drying process is important for obtaining freeze-dried samples with the desired final moisture content under various operating conditions. The current study extensively presents a simple and low-cost methodology for implementing a data acquisition system in a laboratory-scale freeze dryer. The results showed that higher drying temperatures (40 C) increased the errors involved in measuring the mass of material; nevertheless, the application of correction blank curves statistically significantly reduced those errors. In general, the system developed provided precise and accurate measurements of the temporal changes in the sample mass and temperature, and chamber pressure variations, allowing monitoring of the production process of freeze-dried samples with low final moisture contents.

Effects of adherence in the drying of brewer’s spent grain with rotating equipment

Authors

Guilherme Henrique Alves Pinto,José Teixeira Freire,Flávio Bentes Freire,Juan F Saldarriaga,Fábio Bentes Freire

Journal

Waste and Biomass Valorization

Published Date

2023/12/7

Brewer’s spent grain (BSG) is a biomass with a high lignocellulosic content that can be reused in thermal processes, however it has high moisture content, which avoids it from being used in these processes. Pretreatment by drying rotating equipment turns out to be a suitable alternative. This work studied the rotational drying of BSG analyzing the effects of adhesion of solids. To do this, a standard pan combined with an external blower was chosen as a rotary dryer due to the easy access to the bed and the inner surface of the dryer. In addition, this type of dryer made possible to determine the relationship between BSG moisture and adhesion force. Under the operating conditions of the experiments, the moisture content of BSG decreased from 80 to 8.6% (wb), making it possible for the biomass to be utilized in thermal processes. Moisture ratios higher than 0.6 led to greater adherence and consequent …

Fluidization design parameters of agroindustrial residues for biomass applications: Experimental, theoretical, and neural networks approach

Authors

Tamires G Targino,José T Freire,Maisa T Bitti Perazzini,Hugo Perazzini

Journal

Biomass Conversion and Biorefinery

Published Date

2023/4

Acai berry residues have great potential for sustainable thermochemical conversion processes. Many of these systems, as well as drying technologies, use the fluidized bed technology, which requires the characterization of the minimum fluidization velocity. The experimental work consisted of obtaining pressure drop curves for different bed heights, inlet air temperature, and particles roughness. The theoretical and data simulation approaches encompassed the minimum fluidization velocity prediction by correlations found in literature and neural networks, respectively. The minimum fluidization velocities were determined in the range 0.67–1.56 m/s. The minimum fluidization velocity decreased exponentially with increasing air temperature in the range 50–80 °C, but increased with the increase of the bed height in the range 1.5–4.5 cm. This effect was only observed for particles with fibers, indicating a strong …

Effect of orange waste pretreatment on the fluid dynamics of spouted beds with mechanical agitation

Authors

Guilherme Henrique Alves Pinto,Xabier Sukunza,José Teixeira Freire,Martin Olazar,Fábio Bentes Freire

Journal

Powder Technology

Published Date

2023/10/1

The spouted bed has a vigorous cyclic movement of the solids and high rates of heat and mass transfer, allowing for effective contact between the different phases. However, the spouted bed may exhibit instabilities for inherently cohesive solids due to unwanted agglomeration, preferential channels, particle segregation and high energy consumption. In this context, the present work analyzed the effect of a preliminary treatment of the orange waste, through the addition of lime and mechanical pressing, on the fluid dynamics in two spouted bed configurations of same dimensions, one conventional (CSB) and the other one modified with mechanical agitation (modified mechanically spouted bed, MMSB). The preliminary treatment of the biomass allowed reducing the moisture content by 31.7%, thereby improving the movement of solids in the CSB as when the in natura (raw) biomass was loaded, as the latter …

Modelling and characterisation of jackfruit seeds drying using the diffusion theory considering shrinkage

Authors

Camila Miwa Uchida Watanabe,Ronaldo Correia de Brito,José Teixeira Freire,Maximilian Joachim Hodapp,Maisa Tonon Bitti Perazzini,Hugo Perazzini

Journal

Biosystems Engineering

Published Date

2023/9/1

HighlightsDifferential Scanning Calorimetry and Thermogravimetric Analysis characterisation.Determination of the shrinking parameters of the solid during drying process.Analytical solution of the diffusive model and estimation of transport parameters.Numerical solution of the diffusive model considering solids shrinkage.Jackfruit seeds can be considered a valuable bioresource that can be efficiently used as biomass for bioenergy, but it requires a pre-treatment step using drying. Although studies have shed some light on its drying behaviour, there is still a remarkable gap in knowledge regarding the fundamental drying characteristics of jackfruit seeds biomass in the context of renewable energy. In this work, thermal characterisation and drying kinetics of jackfruit seeds were investigated. The drying experiments were conducted in a convective dryer at particle level under different inlet air velocities and temperatures …

Application of Clay-Biochar Composites as Adsorbents for Water Treatment

Authors

Luiz Daniel da Silva Neto,Ícaro Mychel Gomes Leite de Sá,Rafaela Gabriel,Pollyanna Vanessa dos Santos Lins,José Teixeira Freire,Lucas Meili

Published Date

2023/8/7

Recently, biochar has been recommended as a supporting material for nanometric particles to prevent agglomeration and improve surface area. Among the conceivable uses, clay dispersion over biochar appears to be an intriguing and creative choice that allows for the simultaneous and synergistic exploitation of the adsorptionAdsorption capabilities of both materials. In fact, modifying biochar with clays to generate composites is projected to considerably increase its adsorptive activity, representing an important opportunity to broaden the uses of a sustainable low-cost adsorbentAdsorbents. In light of this, the purpose of this chapter is to investigate the adsorptionAdsorption of various contaminants on clays supported on biochar. The chapter will be divided into sections that cover the principles of clays, biochar, and their unique features, the main techniques of composite synthesis, and the use of these materials as …

Drying of Suspensions and Pastes in Spouted Beds

Authors

José Teixeira Freire,Maria do Carmo Ferreira,Fábio Bentes Freire,Ronaldo Correia de Brito

Published Date

2023/7/17

Many industrial processes concerned with powder production rely on thermal drying to remove water or solvents from intermediate products in the form of pastes and suspensions. Spray-drying remains the most important technique for large-scale processing and industrial applications aimed at drying liquid suspensions. Despite being widely used, spray-dryers have high installation costs and might have limitations for processing products with determined features, such as too viscous or too sticky materials. Atomizing or dripping the product in an agitated vessel containing particles suspended in a hot air flow emerged as an alternative technique to the spray drying. It takes advantage of the high turbulence and inter-particle contact that are characteristic features of fluidized, spouted, and vibrofluidized systems. The first studies on drying organic dyes and dye intermediates in spouted beds date back to the 1960s …

Heat and Mass Transfer during Sorghum Grains Drying in a Thick Fixed Bed with and without Change of Airflow Direction

Authors

Barbosa LdS,Ferreira MdC,JT Freire,FB Freire

Published Date

2023/12/29

Drying grains in a fixed bed can be an interesting alternative to prevent undesirable breaks and fractures of solids due to mechanical shocks, something that cannot be avoided when drying in moving beds. A disadvantage of fixed bed drying is that there can be significant gradients in the critical variables if the layer of particulate solids is thick. This work shows that periodically changing the direction of drying air flow is an effective technique to reduce differences within the bed and allow better uniformity of the product. Drying in a thick layer of 10 cm of sorghum grains was carried out at 50 and 60oC for air flow velocity of 2.1 ms-1. The results showed that despite increasing the total drying time, the technique actually allowed a significant decrease in the temperature gradients and moisture content of the sorghum grains. The change in direction of the air flow caused the drying front to be displaced, sometimes towards the top, sometimes towards the base of the bed. At 50oC, drying lasted a total of 240 min, bringing the sorghum grains to an average overall moisture content of 0.13 on a dry basis.

Intermittent Drying of Soybeans in Conical Spouted Beds: Modeling Approach

Authors

Ronaldo Correia de Brito,Mikel Tellabide,Aitor Atxutegi,Idoia Estiati,Martin Olazar,Jose T Freire

Journal

Industrial & Engineering Chemistry Research

Published Date

2023/5/16

Intermittent drying is a promising methodology to conventional drying which offers benefits related to energy and better-quality products. However, modeling of this technique remains a challenge. Thus, this study aims to propose a fully predictive model for intermittent drying in conical spouted bed dryers. A single-phase model is used to account for the heat and mass transfer on the soybean surface and their inside, and the predictions are compared with the experimental results. The proposed model provides physically consistent results and is coherent with the experimental data, mainly for drying under moderate air temperatures with moderate and long resting periods. As the average moisture content and the average particle temperature are estimated based on the spatial discretization used in the numerical solution, as well as on the boundary conditions adopted, the internal gradients of moisture and …

DECOMPOSIÇÃO TÉRMICA DE RESÍDUOS PUROS E MISTURAS BINÁRIAS

Authors

THALYNE AF ROCHA,GUILHERME HENRIQUE ALVES PINTO,José Teixeira Freire

Published Date

2022

Neste trabalho foi analisada a decomposição térmica de resíduos orgânicos puros: borra de café, bagaço de cana e bagaço de laranja e em misturas binárias: 50% borra de café–50% bagaço de laranja e 50% borra de café–50% bagaço de cana. Tendo como finalidade analisar o comportamento de queima dos resíduos individuais e verificar se há interações físico-químicas entre eles durante a decomposição térmica oxidativa. Foi observado que o bagaço de cana e a borra de café puros tem maior velocidade de reação, enquanto o bagaço de laranja tem maior velocidade na região de queima propriamente dita. Para as misturas binárias foram verificadas interações físico-químicas entre os resíduos de borra de café e bagaço de laranja na região queima. No entanto, essa mesma interação não foi verificada com tanta expressividade para a mistura de borra de café e bagaço de cana.

Fundamentals of layered double hydroxides and environmental applications

Authors

Luiz D Silva Neto,Anamália F Silva,José T Freire,Lucas Meili

Published Date

2022/1/1

Due to their almost unique ion exchange characteristics, reconstruction of calcined precursors, memory effect, and surface area, layered double hydroxides (LDHs) present a wide variety of applications. Physical-chemical, structural and morphological characteristics give to LDHs properties useful in the solution of environmental problems. LDHs can be used in removing organic, inorganic compounds, dyes, heavy metals, and nuclear ions, in the controllable release of minerals and pesticides in the soil, among others. This chapter presents a theoretical basis on the synthesis of LDHs and an overview of the essential and particular factors of the material proposed in environmental remediation through current publications.

Efficiency analysis of citrus waste biomass valorization using rotary dryer

Authors

Hugo Perazzini,Maisa TB Perazzini,Flavio B Freire,Fábio B Freire,José T Freire

Journal

Drying Technology

Published Date

2022/12/12

Citrus residue is a large-scale agro-industrial biowaste that can become a source of renewable energy through drying. Drying demands high power consumption due to the low energy efficiency of this process in the industries. In this work, the energy performance of the drying process in a semi-industrial rotary drum of 2.7 m length and 0.45 diameter was analyzed. The main objective was to find the operational condition for the lowest energy consumption and also the highest energy, drying and exergetic efficiencies. The experiments were performed under different solid mass flow rates (0.2 and 0.4 kg/min) inlet air velocities (1 and 2 m/s) and temperatures (135, 145, and 155 °C). The average energy efficiency was 13.1% with 25.1% of drying efficiency, 37291.3 kJ/kg of specific energy consumption, and 37.3% of exergy efficiency. The results showed that the drying technique can be an interesting alternative to …

Solid drying in a thick fixed bed with airflow reversal

Authors

Luana B Genaro,Flavio B Freire,José T Freire,Fábio B Freire

Journal

Chemical Engineering and Processing-Process Intensification

Published Date

2022/1/1

This work numerically and experimentally analyzed the drying of alumina beads in a thick fixed bed with reversal of the air flow direction. For this, a two-phase model was derived using the Massarani and Telles [1] model as a starting point. The analysis of the model's performance was carried out for both conventional drying and drying with flow reversal. Thick layer experiments were carried out at temperatures of 40, 50 and 60 °C and air velocity of 2.7 m s−1, measuring transient temperatures and moisture at different axial positions of the drying bed. The reversal of airflow was at the initial time (t0) of 10 min and intervals (∆t) of 10, 30 and 50 min. The results showed that the reversal decreased the moisture and temperature gradients along the axial position of the dryer. The counterpart was that there was an increase in drying time, resulting in an increase in energy consumption and a decrease in efficiency when …

Fluid dynamics, velocity profile and average cycle time in different configurations of the modified mechanically stirred spouted bed

Authors

João Pedro Alves de Azevedo Barros,Fábio Bentes Freire,José Teixeira Freire

Published Date

2022/11

We analyzed modified spouted bed configurations incorporating three different types of mechanical stirrer, in comparison to a conventional spouted bed. Straight-blade, inclined-blade, and helical screw agitators were used with different types of inert particles. The behavior of the fluid dynamic curves was qualitatively similar for the systems with agitators and the conventional design, except for the screw-type agitator. For the straight-blade and inclined-blade agitators, increase of the rotation speed had a positive effect on the fluid dynamic parameters, reducing the air flow and the pressure drop in the bed. The effects of rotation speed and blade inclination on the fluid dynamics were minimized at 240 rpm, although the mass of particles could influence these parameters. The inclined-blade stirrer performed the best, reducing airflow between 40 and 66% compared to the conventional spouted bed. For the screw-type …

Effects of lyophilization on colorimetric indices, phenolics content, and antioxidant activity of avocado (Persea americana) pulp

Authors

Vanessa Dal-Bó,José Teixeira Freire

Journal

Food Control

Published Date

2022/2/1

Drying processes can be performed using different methods, with the selected technique and operational conditions directly influencing the quality of the final product. The aim of this work was to evaluate the effect of the heating tray temperature (without temperature control, and controlled at 30, 40, and 50 °C) used for lyophilization of avocado (cv. Breda) pulp, considering the process drying time and the following quality parameters: dynamic equilibrium moisture, colorimetric indices, phenolic compounds, and antioxidant activity of the fruit pulp. Greater browning was observed for the dehydrated paste samples (82.48–139.15%), compared to the fresh fruit (64.27%). The best results for phenolic compounds (8 and 10.23 mg EAG/g db for slice and paste samples, respectively) and antioxidant activity (41.08 and 60.53% for slice and paste samples, respectively) were found for lyophilization with the heating tray …

ESTIMATIVA DOS EFEITOS DOS TECIDOS DE PROTEÇÃO DOS GRÃOS DE CEVADA NO PROCESSO DIFUSIVO

Authors

MARCOS P FELIZARDO,GUSTAVO D MAIA,FABIO B FREIRE,JOSÉ T FREIRE

Published Date

2022

O processo de malteação envolve a absorção de água até o início das atividades fisiológicas dos grãos de cevada. Esse processo de transferência de umidade tem efeito de diversos fatores, como a morfologia dos grãos e a atividades metabólicas. Assim, o objetivo deste trabalho foi a modelagem dos efeitos das diferentes camadas dos grãos de cevada no processo de hidratação. Para isso foram realizados diferentes níveis de polimentos de grãos, que foram hidratados por imersão em água a temperatura de 25 C, as cinéticas de absorção de água foram modeladas pela solução analítica da analogia da Lei de Fick e então foram estimadas resistências para as diferentes camadas utilizando a analogia da Lei de Ohm. Verificou-se que o pericarpo e a testa são tecidos com alta resistência a transferência de massa quando comparado aos demais tecidos, com valor de cerca de 4.30 x109 s/m.

Soft sensor based on a lumped parameter model of solids drying in a spouted bed

Authors

ER Paula,RC Brito,JT Freire,FB Freire

Journal

Drying Technology

Published Date

2021/2/15

The aim of this study was to develop a soft sensor for estimation of the solids temperature and moisture content during the drying of porous alumina in a spouted bed. Mechanistic-empirical and fundamental models were employed to develop the soft sensors, which were evaluated for continuous and intermittent drying. Soft sensors provided consistent results and good agreement with experimental measurements. The robustness of the soft sensor also was confirmed, since it was able to predict the solids moisture content during intermittent drying based on a calibration from the continuous process. Therefore, this work describes the successful development of a reliable, robust, and low computing cost mathematical model soft sensor.

Modeling and cost analysis of drying of citrus residues as biomass in rotary dryer for bioenergy

Authors

Hugo Perazzini,Maisa TB Perazzini,Flavio B Freire,Fábio B Freire,José T Freire

Journal

Renewable Energy

Published Date

2021/9/1

The valorization of residues in any industrial processing activities aims at the reuse, recycling or composting of solid wastes, in such a way as to generate useful products or sources of energy. Citrus residues have been recognized as a promising biomass for renewable energy and liquid fuels. Drying is an interesting alternative to add value to solid waste, as long as it is economically viable, and one of the most important operations for efficient performance of the energy conversion technologies. In this work, a dynamic model of drying citrus residues in a rotating drum was developed and verified experimentally. From overall heat and mass balances, a series of perfectly stirred tanks was added together for each solid recycle and residence time in order to fully describe citrus solid wastes drying in the semi-industrial rotary drum. Process cost analysis was also performed to assess the most suitable drying level to …

See List of Professors in José Freire University(Universidade Federal de São Carlos)

José Freire FAQs

What is José Freire's h-index at Universidade Federal de São Carlos?

The h-index of José Freire has been 22 since 2020 and 34 in total.

What are José Freire's top articles?

The articles with the titles of

Effects of composition and pre-treatment on the physical and mechanical properties of pellets of orange juice waste

Production of MgAl/layered double hydroxide microspheres and investigation of the volumetric heat transfer coefficient in spray drying

SYSTEM DEVELOPMENT FOR MONITORING THE PRODUCTION PROCESS OF FREEZE-DRIED SAMPLES: A SIMPLE AND LOW-COST APPROACH: Original scientific paper

Effects of adherence in the drying of brewer’s spent grain with rotating equipment

Fluidization design parameters of agroindustrial residues for biomass applications: Experimental, theoretical, and neural networks approach

Effect of orange waste pretreatment on the fluid dynamics of spouted beds with mechanical agitation

Modelling and characterisation of jackfruit seeds drying using the diffusion theory considering shrinkage

Application of Clay-Biochar Composites as Adsorbents for Water Treatment

...

are the top articles of José Freire at Universidade Federal de São Carlos.

What are José Freire's research interests?

The research interests of José Freire are: Fenômenos de Transporte e Sistemas Particulados

What is José Freire's total number of citations?

José Freire has 4,280 citations in total.

What are the co-authors of José Freire?

The co-authors of José Freire are Marcos A.S. Barrozo, Wanderley Pereira Oliveira, Hamid Arastoopour, Luis Alexandre Pedro de Freitas, Fabio Bentes Freire, Eduardo Cleto Pires.

    Co-Authors

    H-index: 52
    Marcos A.S. Barrozo

    Marcos A.S. Barrozo

    Universidade Federal de Uberlândia

    H-index: 37
    Wanderley Pereira Oliveira

    Wanderley Pereira Oliveira

    Universidade de São Paulo

    H-index: 36
    Hamid Arastoopour

    Hamid Arastoopour

    Illinois Institute of Technology

    H-index: 35
    Luis Alexandre Pedro de Freitas

    Luis Alexandre Pedro de Freitas

    Universidade de São Paulo

    H-index: 22
    Fabio Bentes Freire

    Fabio Bentes Freire

    Universidade Federal de São Carlos

    H-index: 20
    Eduardo Cleto Pires

    Eduardo Cleto Pires

    Universidade de São Paulo

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