Kinetic Energy
Mostrando 13-24 de 615 artigos, teses e dissertações.
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13. Kinetic parameters study for the slow pyrolysis of coffee residues based on thermogravimetric analysis
Thermal decomposition of coffee husks was investigated by thermogravimetric analyses. The proximate, ultimate and composition analyses were performed. Thermogravimetric tests were realized, the material was heated to 1173 K using five heating rates: 5, 10, 15, 20, 25 K min-1. The kinetic parameters were estimated using the methods of Kissinger-Akahira-Sunose
Quím. Nova. Publicado em: 2020-04
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14. Kinetics of Lumefantrine Thermal Decomposition Employing Isoconversional Models and Artificial Neural Network
Thermal analysis can be used to determine shelf-life and kinetic parameters in pharmaceutical systems. This work investigates the kinetic of lumefantrine thermal decomposition, an antimalarial, using non-isothermal and isothermal experimental data. The non-isothermal conditions are analyzed applying Vyazovkin method, while isothermal conditions employ models
J. Braz. Chem. Soc.. Publicado em: 2020-03
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15. Strontium Oxide Decorated Iron Oxide Activated Carbon Nanocomposite: A New Adsorbent for Removal of Nitrate from Well Water
In the present study, activated carbon was magnetized by iron oxide and modified by strontium based nanoparticles (FeAC@Sr) to introduce it as an efficient favorable adsorbent for the removal of nitrate ions from underground water. The decorated adsorbent was characterized in terms of size, structure, morphology and composition using scanning electron micros
J. Braz. Chem. Soc.. Publicado em: 2020-01
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16. Performance evaluation of GSA, SOS, ABC and ANN algorithms on linear and quadratic modelling of eggplant drying kinetic
Abstract In this study, kinetics of eggplant drying was modeled in the laboratory-scaled Food Drying Oven (FDO) with resistance heater was designed and manufactured. The temperature, energy consumption and drying time of FDO were recorded by keeping the temperature of at different temperatures as 40, 50 and 60 °C. These saved values were chosen as the input
Food Sci. Technol. Publicado em: 20/12/2019
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17. Comportamento físico da precipitação interna em um povoamento de Eucalyptus
Resumo A compreensão das características físicas da chuva e sua interação com a paisagem possibilita o desenvolvimento de modelos matemáticos mais condizentes com a realidade além de auxiliar no planejamento eficiente de obras e práticas agrícolas. O objetivo deste estudo foi caracterizar a precipitação interna de um povoamento de Eucalyptus no mu
Ciênc. Florest.. Publicado em: 02/12/2019
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18. Activated carbon loaded with manganese and iron for glyphosate adsorption: Kinetics, isotherms and thermodynamic studies
Resumo Carvão ativado granular foi impregnado com 1% de ferro e 0,5% de manganês (m/m) para remoção de glifosato em soluções aquosas. O adsorvente foi caracterizado por microscopia eletrônica de varredura, espectroscopia de energia dispersiva, técnicas de adsorção de nitrogênio e análises de potencial zeta. Estudos em batelada foram realizados pa
Rev. Ambient. Água. Publicado em: 25/11/2019
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19. Ensaio não destrutivo em revestimento cerâmico utilizando um protótipo para detecção de patologia
RESUMO No setor da construção civil há um crescente investimento na manutenção e reparo das construções, como por exemplo, as patologias encontradas nos pisos com revestimento cerâmico. Dentre as patologias mais comuns se pode destacar o assentamento inadequado das placas cerâmicas, que são caracterizadas pela perda de aderência de algumas placas
Matéria (Rio J.). Publicado em: 25/11/2019
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20. Evaluation of the Projectile's loss of Energy in Polyester Composite Reinforced with Fique Fiber and Fabric
Firearms threat has always been a matter of personal concern, especially to soldiers in armed conflicts as well as police officers and civilians involved with public security. A multilayered armor system (MAS) is intended to personal protection against high kinetic energy ammunition, such as that used in rifles. MAS layers are normally composed of a front ce
Mat. Res.. Publicado em: 21/10/2019
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21. Thermal Stability and Kinetic of Decomposition of Mono- and Dicationic Imidazolium-Based Ionic Liquids
Phase transitions, thermal stability, thermokinetics and activation parameters of degradation reaction of the dicationic ionic liquids (ILs), 1,n-bis(3-methylimidazolium-1-yl)alkane ([BisAlk(MIM)2][2Br]) and monocationic ILs, 1-(3-methylimidazolium-1-yl)alkane ([Alk(MIM)][Br]), where Alk = Dec, DoDec, TetDec, (decane, dodecane, tetradecane) were evaluated. T
J. Braz. Chem. Soc.. Publicado em: 21/10/2019
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22. KINETIC STUDIES OF HYDROLYSIS REACTION OF NaBH4 WITH γ-Al2O3 NANOPARTICLES AS CATALYST PROMOTER AND CoCl2 AS CATALYST
Abstract Solid-state hydrogen storage is of considerable concern as a potential hydrogen source for portable fuel cell applications. This study mainly focuses on kinetics of NaBH4/Al2O3 nanoparticles (20 nm)/H2O system with CoCl2 as catalyst and the factors that affect the hydrogen generation rate (HGR). It is observed that the reaction rate increases consid
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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23. DETERMINAÇÃO DOS PARÂMETROS CINÉTICOS E SIMULAÇÃO COMPUTACIONAL DO PERFLUOROPOLIÉTER (PFPE) EMPREGADO COMO LUBRIFICANTE SINTÉTICO
This work aims to determine the kinetic parameters of the thermal decomposition of a lubricating grease based on perfluoropolyether (PFPE) and the computational simulation of this decomposition. The determination of kinetic parameters of thermal decomposition was done by thermal analysis using thermogravimetry (TG) at different heating rates (β) of 10, 15 a
Quím. Nova. Publicado em: 26/08/2019
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24. Energy absorption of aluminum panels subjected to gelatin projectile impact
Abstract Digital image correlation (DIC) method has been widely used on dynamical experiments. This full-field and real-time method can fill in the gap of traditional point-based measurements of typical structures subjected to soft body impact such as bird strike. In order to get further understandings of soft body impact process, the present study analyzed
Lat. Am. j. solids struct.. Publicado em: 29/07/2019