Continuous Reactor
Mostrando 13-24 de 148 artigos, teses e dissertações.
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13. SELECTIVE HYDROGENOLYSIS OF GLYCEROL TO PROPYLENE GLYCOL IN A CONTINUOUS FLOW TRICKLE BED REACTOR USING COPPER CHROMITE AND Cu/Al2O3 CATALYSTS
The glycerol hydrogenolysis reaction was performed in a continuous flow trickle bed reactor using a water glycerol feed and both copper chromite and Cu/Al2O3 catalysts. The commercial copper chromite had a higher activity than the laboratory prepared Cu/Al2O3 and was used for most of the tests. Propylene glycol was the main product with both catalysts, aceto
Quím. Nova. Publicado em: 2017-05
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14. SIMULATION OF MICROALGAL GROWTH IN A CONTINUOUS PHOTOBIOREACTOR WITH SEDIMENTATION AND PARTIAL BIOMASS RECYCLING
Abstract Microalgae are considered as promising feedstocks for the third generation of biofuels. They are autotrophic organisms with high growth rate and can stock an enormous quantity of lipids (about 20 - 40% of their dried cellular weight). This work was aimed at studying the cultivation of Scenedesmus obliquus in a two-stage system composed of a photobio
Braz. J. Chem. Eng.. Publicado em: 2016-12
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15. COMBINED TREATMENT OF VINASSE BY AN UPFLOW ANAEROBIC FILTER-REACTOR AND OZONATION PROCESS
Abstract The aim of the present study was to evaluate the efficacy of treating vinasse using anaerobic digestion (AD) followed by ozonation. The AD process was performed using a laboratory-scale upflow anaerobic filter reactor (UAFR) under continuous operation at 29 ± 1 °C. Stable conditions were reached at 10 kgCOD m-3 d-1 and a hydraulic retention time (
Braz. J. Chem. Eng.. Publicado em: 2016-12
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16. METODOLOGIA EXPERIMENTAL PARA REAÇÕES GÁS-LÍQUIDO
Although the gas-liquid reactions are employed in many industrial processes, this issue in the most of time is not included in the curriculum of Chemistry and Chemical Engineering courses. This work aims to propose the study of gas-liquid reaction for the degree course, considering a widespread system, the reaction of CO2-NaOH. A reaction mechanism was propo
Quím. Nova. Publicado em: 2016-06
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17. CONTINUOUS AND SEMICONTINUOUS REACTION SYSTEMS FOR HIGH-SOLIDS ENZYMATIC HYDROLYSIS OF LIGNOCELLULOSICS
Abstract An attractive operation strategy for the enzymatic hydrolysis of lignocellulosics results from dividing the process into three stages with complementary goals: continuous enzyme adsorption at low-solids loading (5% w/w) with recycling of the liquid phase; continuous liquefaction at high-solids content (up to 20% w/w); and, finally, continuous or sem
Braz. J. Chem. Eng.. Publicado em: 2015-12
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18. Catalizadores de cobre soportado parareducción selectiva de glicerol
ABSTRACTThe biodiesel industry has brought with it an oversupply of glycerol, which is the byproduct of the process, generating a fall in its price. The transformation of glycerol into value-added compounds interest as it would improve the overall economic balance of biofuel production enabling environmentally sustainable development by using renewable raw m
Matéria (Rio J.). Publicado em: 2015-09
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19. COMPARISON OF UASB AND FLUIDIZED-BED REACTORS FOR SULFATE REDUCTION
Abstract Reactor hydrodynamics is important for sulfidogenesis because sulfate reduction bacteria (SRB) do not granulate easily. In this work, the sulfate reduction performance of two continuous anaerobic bioreactors was investigated: (i) an upflow anaerobic sludge blanket (UASB) reactor and (ii) a fluidized bed reactor (FBR). Organic loading, sulfate reduct
Braz. J. Chem. Eng.. Publicado em: 2015-03
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20. Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol
In the present study, the transesterification of Jatropha oil in a continuous catalyst-free process using supercritical ethanol was investigated. Experiments were performed in a packed-bed tubular reactor by studying the effect on the reaction of temperature, pressure, water and cosolvent (n-hexane) concentrations, keeping the oil:ethanol mass ratio fixed at
Braz. J. Chem. Eng.. Publicado em: 2014-09
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21. Activated sludge inhibition capacity index
Toxic compounds in sewage or industrial wastewater may inhibit the biological activity of activated sludge impairing the treatment process. This paper evaluates the Inhibition Capacity Index (ICI) for the assessment of activated sludge in the presence of toxicants. In this study, activated sludge was obtained from industrial treatment plants and was also syn
Braz. J. Chem. Eng.. Publicado em: 2014-06
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22. Study of mixing behavior of cstr using CFD
The continuous stirred tank reactor (CSTR) is a widely used equipment in chemical related industries. The flow behaviour of fluid inside the reactor may either change from dispersion to ideal or ideal to dispersion mixing state. It is studied using the computational fluid dynamics (CFD) simulation software ANSYS Fluent. The mixing behaviour is predicted in t
Braz. J. Chem. Eng.. Publicado em: 2014-03
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23. Metodologia para aplicar LES ao craqueamento catalítico fluido em um reator riser industrial / Large eddy simulation application methodology to a fluid catalytic cracking industry reactor
The main objective of this thesis is to propose a methodology in how to apply Large Eddy Simulation (LES) on a unit of catalytic cracking. In order to achieve this, it was proposed an alternative way of constructing the computational mesh, by using quasi-uniform meshes. The proposed meshes were implemented to minimize the computational effort and procedure f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/2012
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24. Tratamento de corantes reativos em solução aquosa utilizando lodo de esgoto sanitário como biossorvente em reatores contínuos. / Treatment of reactive dyes in aqueous solution using sewage sludge as biosorbent in continuous reactors.
Conventional treatments of textile industry effluents usually produce significant amounts of recalcitrant subproducts. Among the new treatment technologies, adsorption appears as an alternative method. In this study, the efficiency of sewage sludge in the removal of reactive dye yellow GR, blue GN and red RB was evaluated to pH, total alkalinity, volatile fa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2012