Distillation Columns
Mostrando 1-12 de 57 artigos, teses e dissertações.
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1. ENERGY AND EXERGETIC EVALUATION OF THE MULTICOMPONENT SEPARATION OF PETROCHEMICAL NAPHTHA IN FALLING FILM DISTILLATION COLUMNS
Abstract Multicomponent separation of synthetic petrochemical naphtha (hexane, cyclohexane, toluene and xylene) was carried out in a falling film distillation sequence with heat supply using a vapor chamber (thermosyphon). Tests were carried out by varying feed flow rate and temperatures of the feed and the vapor chamber in two ways of heat supply: isotherma
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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2. DEVELOPMENT OF A START-UP OPERATION AND DYNAMIC BEHAVIOR OF A THERMALLY COUPLED EXTRACTIVE DISTILLATION SCHEME
ABSTRACT The startup operation of distillation columns is one of the most complex steps performed in the industry. This complexity becomes even greater for thermally coupled extractive distillation systems. Thermally coupled configurations are commonly used in order to minimize the excessive amount of energy required to perform distillation. In view of this,
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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3. Assessment of Chemical and Mechanical Properties of Polymers Aiming to Replace the Stainless Steel in Distillation Column
Small scale ethanol production process faces a number of challenges that negatively impact productivity and economic costs. The present work aims at finding alternative materials with lower cost and suitable resistance to replace the stainless steel commonly used in distillation columns in small scale businesses. For that we analyzed the chemical and mechani
Mat. Res.. Publicado em: 12/04/2018
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4. Analysis and extension of the Furter equation, and its application in the simulation of saline extractive distillation columns
ABSTRACT Simulation of saline extractive distillation columns is a difficult task owing to the high nonlinearity of the rigorous models that represent these systems. The use of simple models to obtain initial estimates of equilibrium compositions may improve the stability and rate of convergence. One of the simplest models to study the vapor-liquid equilibri
Braz. J. Chem. Eng.. Publicado em: 2017-04
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5. CONTROL PROPOSAL FOR A HIGH PURITY COLUMN BASED ON THE SEPARATION OF VARIABLES BY THE INDEPENDENT COMPONENT ANALYSIS METHOD
Abstract Many industries are complex when it comes to operation mode. In order to reduce the problems related to strong coupling in these processes, the search for the incorporation of artificial intelligence devices has shown an increasing trend in recent years. Due to this complexity and control in multivariable processes, diagnosis and fault monitoring in
Braz. J. Chem. Eng.. Publicado em: 2017-01
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6. HIGHLY-ACCURATE MODEL ORDER REDUCTION TECHNIQUE ON A DISCRETE DOMAIN
Abstract In this work, we present a highly-accurate technique of model order reduction applied to staged processes. The proposed method reduces the dimension of the original system based on null values of moment-weighted sums of heat and mass balance residuals on real stages. To compute these sums of weighted residuals, a discrete form of Gauss-Lobatto quadr
Braz. J. Chem. Eng.. Publicado em: 2015-09
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7. PERFORMANCE INDICES TO DESIGN A MULTICOMPONENT BATCH DISTILLATION COLUMN USING A SHORTCUT METHOD
AbstractIn this paper, three quality or performance indices (Luyben's capacity factor, total annual costs, and annual profit) were applied for the design of a batch distillation column working at variable reflux. This work used the Fenske-Underwood-Gilliland short-cut method to solve a problem of four components (benzene, toluene, ethyl-benzene, and ortho-xy
Braz. J. Chem. Eng.. Publicado em: 2015-06
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8. Simulation of ethanol extractive distillation with mixed glycols as separating agent
Extractive distillation is an alternative for ethanol dehydration processes that has been shown to be more effective than azeotropic distillation and, in close proximity, to be very competitive against the process that uses adsorption with molecular sieves. Glycols have been shown to be the most effective solvents in extractive distillation, mainly ethylene
Braz. J. Chem. Eng.. Publicado em: 2014-03
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9. Brazilian vodkas have undetectable levels of ethyl carbamate
While in Europe vodka is mainly derived from potatoes or cereals, a large proportion of Brazilian vodka is likely obtained from sugarcane, which contains ethyl carbamate (EC) precursors. EC, in addition to several other contaminants and congeners, were investigated in 32 samples of Brazilian vodka. All samples complied with the Brazilian regulations for cong
Quím. Nova. Publicado em: 2013
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10. Estudo de colunas de destilação de alta eficiência : HIGEE / Study of high-efficiency distillation columns : HIGEE
Nas últimas décadas, a intensificação de processos tem atraído a atenção da academia e da indústria. A Rotating Packed Bed (RPB) foi desenvolvida no contexto de intensificação de processos e tem sido amplamente usada em destilação, absorção, dessorção, dessulfuração, oxidação, cristalização, precipitação, polimerização e síntese de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/06/2012
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11. Sensor virtual inteligente para estimação de composições em colunas de destilação / Intelligent virtual sensor for composition estimation in distillation columns
Um problema-chave envolvendo processos químicos industriais é controlar, de forma confiável, eficiente e barata, a evolução dinâmica do sistema. Numa coluna de destilação, por exemplo, o objetivo do controle é manter a composição do destilado e do produto de fundo em torno de um valor desejado. As dificuldades operacionais e o alto custo dos anali
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2012
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12. Estudo de nova configuração de colunas de destilação aumentando eficiência energética / Study of a new set of distillation columns for increasing energy efficiency
O objetivo dessa dissertação foi o de comparar, através de simulações utilizando o software Aspen Plus® os gastos energéticos de uma coluna de destilação usual com relação a uma Coluna de Destilação com Integração Interna de Calor (CDIIC), para o mesmo fim. A destilação é um processo que consome muita energia sendo que possui uma baixa efic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2011