Catalytic Reactors
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. BIOTECHNOLOGICAL APPLICATION OF SURFACE MODIFIED CERIUM OXIDE NANOPARTICLES
ABSTRACT Re-engineering of chemical materials at the nanoscale level that employ modification and improvement in their physical and chemical properties has been constantly pursued for application in biomedical and biotechnology industries. Moreover, immobilization of catalysts on these bio/chemically modified nanomaterials improved the performance of enzymes
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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2. UTILITY OF FUNCTIONALIZED AGAROSE NANOPARTICLES IN HYDROLYZING LACTOSE IN BATCH REACTORS FOR DAIRY INDUSTRIES
The present study investigates the synthesis of agarose nanoparticles (ANPs) and its surface modification by galactose for the immobilization of β-galactosidase. Galactose modified ANPs retained 91% enzyme activity upon immobilization. Optimum pH (4.5) and temperature (50 ºC) remains unchanged after immobilization. However, immobilized enzyme retained grea
Quím. Nova. Publicado em: 2018-04
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3. ADVANCED CONTROL OF A COMPLEX CHEMICAL PROCESS
Abstract Three phase catalytic hydrogenation reactors are important reactors with complex behavior due to the interaction among gas, solid and liquid phases with the kinetic, mass and heat transfer mechanisms. A nonlinear distributed parameter model was developed based on mass and energy conservation principles. It consists of balance equations for the gas a
Braz. J. Chem. Eng.. Publicado em: 2016-03
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4. SELECTIVE CATALYTIC REDUCTION (SCR) OF NO BY AMMONIA OVER V2O5/TiO2 CATALYST IN A CATALYTIC FILTER MEDIUM AND HONEYCOMB REACTOR: A KINETIC MODELING STUDY
Abstract The present study addresses a numerical modeling and simulation based on the available knowledge of SCR kinetics for prediction of NO conversion over a V2O3/TiO3 catalyst through a catalytic filter medium and honeycomb reactor. After introducing the NH3-SCR system with specific operational criteria, a reactor model was developed to evaluate the effe
Braz. J. Chem. Eng.. Publicado em: 2015-12
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5. Advances in ethanol reforming for the production of hydrogen
Catalytic steam reforming of ethanol (SRE) is a promising route for the production of renewable hydrogen (H2). This article reviews the influence of doping supported-catalysts used in SRE on the conversion of ethanol, selectivity for H2, and stability during long reaction periods. In addition, promising new technologies such as membrane reactors and electroc
Quím. Nova. Publicado em: 2014-06
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6. Desenvolvimento de reator tipo "dip catalyst" para filmes poliméricos contendo nanopartículas de metais de transição
This article describes the development of a new catalytic reactor designed to operate with nanoparticle-embedded polymer thin films. Stabilization of metal nanoparticles in films that serve as catalysts in organic reactions is relatively new; therefore, the development of reactors to facilitate their use is necessary. We describe in detail the preparation of
Quím. Nova. Publicado em: 2014
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7. SUPERCRITICAL WATER GASIFICATION OF BIOMASS
We performed Supercritical Water Gasification (SCWG) for cellulose and lignin for the first time in the absence of catalytic effects from metallic walls, by using quartz reactors. We quantified the catalytic effect of metals by adding metal wires to the reactors. We also performed the first systematic study of the effect of variables on gas yields. We varied
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2009
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8. SÃntese de esferas hÃbridas e seu desempenho na reaÃÃo de desidrogenaÃÃo do etilbenzeno na presenÃa de diÃxido de carbono / Synthesis of hybrid spheres and their performance in the dehydrogenation reaction of ethylbenzene in carbon dioxide presence
The various possibilities of application of the mesoporous materials, such as catalysis and adsorption, it have encouraged the research in the synthesis of these materials. In addition, but less frequent, synthetic routes have been searched in order to obtain a material whose structure and grain size allow its application in industrial reactors, without the
Publicado em: 2009
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9. HidrÃlise e oxidaÃÃo catalÃtica dos carboidratos do bagaÃo de cana-de-aÃÃcar em operaÃÃes descontÃnuas
In the local context, is clearly meet the need to enhance the sugarcane bagasse as biomass plant. Sugar cane bagasse is a waste coming from alcohol and sugar industries and available abundantly. This availability of sugarcane bagasse as raw material at low cost, combined with the feasibility of its recovery via chemical and biochemical processes, is the foun
Publicado em: 2008
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10. Aplication of CFD techniques for he calculation of reacting flow in riser / Aplicação de tecnicas CFD para o calculo de escoamento em meio reativo em riser
A aplicação de Fluidodinâmica Computacional (CFD) em operações industriais vem aumentando sensivelmente, em razão desta auxiliar no projeto de novos equipamentos, bem como a otimização dos já existentes. O presente trabalho apresenta uma série de simulações tridimensionais, bifásicas e adiabáticas, utilizando-se o modelo de dois-fluidos para o
Publicado em: 2008
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11. Preparation and reative studies of catalytic systems based on zirconocenes, face to homo-and co-polimerization reation of etene / Preparação e estudo de reatividade de sistemas catalíticos, a base de zirconocenos, frente à reação de homo- e copolimerização de eteno
Catalytic systems based on zirconoces which are able to polymerize ethene have been studied. Structural modifications on the basic catalytic precursor, diphenylmethylidene(η5- cyclopentadienyl)(η5-9-fluorenyl) zirconium dichloride (5a) have been carried out. The catalytic precursors 5a and bis(para-fluorophenyl)methylidene(η5-cyclopentadienyl)
Publicado em: 2007
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12. Influência do alimentador de sólidos na fluidodinâmica do transporte pneumático.
Pneumatic transport is an operation where powdery and granular materials are conveyed through a pipeline suspended in a gas flow. It is usually found in several industries segments and it is used as a carrier, such as, in beans production; drying operation, like grain dryers; or as reactors, in cracking catalytic reactions, combustion operations and precalci
Publicado em: 2007