Nehemias Curvelo Pereira

ORCID: 0000-0002-0726-2535
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About
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Research Areas
  • Biodiesel Production and Applications
  • Enzyme Catalysis and Immobilization
  • Agricultural and Food Sciences
  • Food Drying and Modeling
  • Textile materials and evaluations
  • Adsorption and biosorption for pollutant removal
  • Material Properties and Processing
  • Membrane Separation Technologies
  • Industrial Gas Emission Control
  • Sensory Analysis and Statistical Methods
  • Catalysis for Biomass Conversion
  • Electrohydrodynamics and Fluid Dynamics
  • Lubricants and Their Additives
  • Catalysis and Hydrodesulfurization Studies
  • Thermochemical Biomass Conversion Processes
  • Microencapsulation and Drying Processes
  • Phytochemicals and Antioxidant Activities
  • Dye analysis and toxicity
  • Postharvest Quality and Shelf Life Management
  • Advanced oxidation water treatment
  • Fuel Cells and Related Materials
  • Plant biochemistry and biosynthesis
  • Bee Products Chemical Analysis
  • Edible Oils Quality and Analysis
  • Antioxidant Activity and Oxidative Stress

Universidade Estadual de Maringá
2015-2024

Universidade Federal de São Carlos
2017

Águas de Portugal (Portugal)
2015

Universidade Tecnológica Federal do Paraná
2014-2015

Universidade Federal do Rio de Janeiro
2009-2015

Altera (United States)
2013

Universidade Paulista
2013

AgroBio
2013

European Union of Medical Specialists
2001-2012

Universidade Federal de Sergipe
2009

The Macauba (Acrocomia aculeata) possesses high potential for the production of biodiesel. species' fruits can be used several purposes. physical–chemical properties oil and ethyl esters were evaluated. During storage period, macauba pulp presented an increase 25.4% in acid value. To obtain from a crude with value without pre-treatment, reactions conducted under-pressurized Parr 4843 reactor. Moreover, experimental delineation was to study esterification proper concentrations ethanol...

10.1016/j.fuel.2015.10.068 article EN publisher-specific-oa Fuel 2015-10-26

Abstract Grape seeds are the main byproduct of grape‐processing industry and contain oil with a high content high‐quality compounds. In this sense, grape seed extracted using Soxhlet, pressing ultrasound was evaluated in relation to its physicochemical properties, fatty acid composition, antioxidant capacity, degree unsaturation critical properties. Interesting values capacity by oxygen radical absorbance assay were obtained for lipophilic hydrophilic extracts ( ca 24–67 2–7 μmol ET g −1...

10.1002/jctb.7314 article EN Journal of Chemical Technology & Biotechnology 2023-01-12

Abstract Experiments were conducted to investigate the removal (or complete elimination) of H 2 S from biogas streams by means absorption and chemical reaction with a 0.4 M Fe/EDTA solution. Biogas was bubbled through pseudo‐catalytic solution resulting in formation sulfur particles. Wide ranges flow rates tested for both biogas, optimal ratio liquid rate gas efficient hydrogen sulfide found. Recirculation regenerated catalytic promoted growth previously‐formed particles, which indicated...

10.1002/ep.10374 article EN Environmental Progress & Sustainable Energy 2009-07-17

ABSTRACT The drying process of crude cotton fabric is analyzed under two main aspects: analysis moisture distribution inside the textile sheet, and certain operational convective variables. Experimental apparatus consisted a chamber in which samples pure were suspended exposed to hot air flow. influence variables on behavior was studied by different ways with generalized curves. profiles compared average content verifying whether values able represent during process. Keywords: Textile...

10.1080/07373930600611984 article EN Drying Technology 2006-04-06

This study investigated the optimization of time coagulation, flocculation, and sedimentation chemical coagulant, aluminum sulfate natural Tannin. It was performed an economic analysis process, checked removal efficiency color, turbidity, COD, treatment characterization using metals, BOD5, total solids. The tests were conducted in Jar Test, different mixing times. required to provide rapid slow 2 20 minutes, respectively, for coagulants, with optimum concentration 400 mg L-1 Tannin 600...

10.4025/actascitechnol.v35i1.11685 article EN cc-by Acta Scientiarum. Technology/Acta scientiarum. Technology 2013-01-30

Fruit consumption and processing result in considerable volumes of residual biomass. Transformation this biomass into biosorbents offers an alternative for its reuse disposal. As the green coconut shell is a waste often discarded landfills dumps, generating gases leachate, two were developed from epicarp mesocarp to adsorb fluoride ions aqueous solution. The kinetic experiments showed that sorption reached equilibrium at 300 min both temperatures 25°C, 35°C, 45°C. removal efficiency varied...

10.1155/2019/7163812 article EN cc-by International Journal of Chemical Engineering 2019-09-02

The use of antibiotics has increased considerably in the last decades human medicine, as well agriculture and animal production. Consequently, high loads these emerging contaminants environment can increase antibiotic-resistant genes development multi-resistant pathogenic microorganisms. This work aims to evaluate removal amoxicillin trihydrate aqueous medium using mineral-activated carbon bituminous origin an adsorbent. adsorbent was classified microporous with associated mesopores, showing...

10.1080/09593330.2022.2148571 article EN Environmental Technology 2022-11-15

In this work, the improvement on concentrated grape juice physico-chemical characteristics by using an enzymatic treatment followed Membrane Separation Process (MSP) has been investigated. By Novozym 33095(r) and Ultrazym AFP L(r) enzymes varying three operating parameters, best result pulp was attained for performed at 35oC, 15 min. 50 mgL-1. micro/ultra filtration processes after pretreatment, performance of MSP with high permeate flux value suitable 0.05 mm membrane pore size, 1 bar...

10.1590/0001-3765201620140136 article EN cc-by Anais da Academia Brasileira de Ciências 2016-03-02
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