Distillation Troubleshooting

Kister, Henry Z.

doi:10.1002/9780471690726

Cited by 72 publications

(134 citation statements)

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“…Different design and types of trays and packings (e.g. sieve tray, valve tray, high capacity tray) have a specific range of satisfactory vapour and liquid flow rates, defined by upper and lower bounds 25,33,34 . Therefore, the column diameter has to be sized appropriately to accommodate the flows of vapour and liquid in the column, and also provide enough active area for mass transfer 25 , without incurring an excessively high pressure drop.…”

Section: Hydraulic Modelsmentioning

confidence: 99%

Optimization-Based Design of Crude Oil Distillation Units Using Rigorous Simulation Models

Ibrahim

Jobson

Guillén‐Gosálbez³

2017

Ind. Eng. Chem. Res.

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The complex nature of crude oil distillation units, including their interactions with the associated heat recovery network and the large number of degrees of freedom, makes their optimization a very challenging task. We address here the design of a complex crude oil distillation unit by integrating rigorous tray-by-tray column simulation using commercial process simulation software with an optimization algorithm. While several approaches were proposed to tackle this problem, most of them relied on simplified models that are unable to deal with the whole complexity of the problem. The design problem is herein formulated to consider both structural variables (the number of trays in each column section) and operational variables (feed inlet temperature, pump-around duties and temperature drops, stripping steam flow rates and reflux ratio). A simulation-optimization approach for designing such a complex system is applied, which searches for the best design while accounting for heat recovery opportunities using pinch analysis. The approach is illustrated by its application to a specific distillation unit, in which numerical results demonstrate that the new approach is capable of identifying appealing design options while accounting for industrially relevant constraints.

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Section: Hydraulic Modelsmentioning

confidence: 99%

Optimization-Based Design of Crude Oil Distillation Units Using Rigorous Simulation Models

Ibrahim

Jobson

Guillén‐Gosálbez³

2017

Ind. Eng. Chem. Res.

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“…In the case of the structured Sulzer BX™ packing, the lower and upper limit values for the vapour loads are VL min = 0.2·Pa 0.5 and VL max = 2.5·Pa 0.5 (Kister, 1992). Because the liquid load is usually not the limiting factor in the case of structured packings, only the lower value of LL min = 0.05 m³/(m³ h) is taken into account (Sulzer Chemtech, 2004).…”

Section: Objective and Penalty Functionsmentioning

confidence: 99%

Reactive Distillation for Multiple-Reaction Systems: Optimisation Study Using an Evolutionary Algorithm

Keller¹,

Dreisewerd²,

Górak³

2013

Chemical and Process Engineering

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Reactive distillation (RD) has already demonstrated its potential to significantly increase reactant conversion and the purity of the target product. Our work focuses on the application of RD to reaction systems that feature more than one main reaction. In such multiple-reaction systems, the application of RD would enhance not only the reactant conversion but also the selectivity of the target product. The potential of RD to improve the product selectivity of multiple-reaction systems has not yet been fully exploited because of a shortage of available comprehensive experimental and theoretical studies. In the present article, we want to theoretically identify the full potential of RD technology in multiple-reaction systems by performing a detailed optimisation study. An evolutionary algorithm was applied and the obtained results were compared with those of a conventional stirred tank reactor to quantify the potential of RD to improve the target product selectivity of multiple-reaction systems. The consecutive transesterification of dimethyl carbonate with ethanol to form ethyl methyl carbonate and diethyl carbonate was used as a case study.

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“…pesados e não desejados (Kister, 1992;Geankoplis, 2003). A espuma formada sobre o prato, em virtude do contato líquido-vapor, permite obter uma avaliação do efetivo contato entre as fases sobre o prato, além de ser a região onde ocorre a maior parte da transferência de massa entre as fases.…”

Section: Ufscar -São Carlos -Sp 16 a 19 De Julho De 2017unclassified

“…O tipo de prato sem downcomer mais simples é o dual flow e constitui-se de uma chapa circular com furos circulares em arranjo triangular equilateral ou quadrado (Kister, 1992;Furzer, 2000;Jiang et al, 2013). O funcionamento adequado de pratos sem downcomer é avaliado por meio de parâmetros fluidodinâmicos, sendo os principais, a altura de líquido e espuma sobre o prato, capacidade, eficiência e queda de pressão total (Mayer et al, 2014).…”

Section: Introductionunclassified

Influência Da Vazão De Líquido Na Queda De Pressão Total E Na Formação De Espuma Em Um Prato Dual Flow

Brondani¹,

Senger²,

Mayer³

et al. 2017

Blucher Chemical Engineering Proceedings

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RESUMO -A operacionalidade de pratos sem downcomer é comumente avaliada através de parâmetros fluidodinâmicos como a queda de pressão total no prato. Essa queda de pressão é dada em função da perda de carga ocasionada pela passagem da fase gasosa, pela retenção de líquido sobre o prato e pela observação da espuma sobre o prato, formada devido ao contato entre as fases. Este trabalho avaliou a queda de pressão total e a espuma formada em um prato dual flow a partir da variação da vazão volumétrica da fase líquida. Os resultados mostraram que a queda de pressão total foi menor na vazão de 300 L/h e maior na vazão de 1200 L/h e aumenta com o aumento da vazão volumétrica da fase gasosa em todas as vazões de líquido analisadas. No entanto, em baixas vazões de líquido (300 L/h) e gás (118,8 m³/h) não ocorreu a formação de espuma sobre o prato e sob elevadas vazões de ar (381,6 m³/h) e baixas de líquido (300 L/h) a formação da espuma é fina e leve, podendo causar arraste da fase líquida. Sob baixas vazões de ar (118,8 m³/h) e elevadas vazões de líquido (1200 L/h) a espuma formada foi menos intensa em virtude da elevada quantidade de líquido. A espuma formada foi mais homogênea e uniforme em vazões intermediárias de líquido e gás, em especial em 900 L/h e entre 237,6 e 288 m³/h, respectivamente. Os resultados mostraram a importância da avaliação da queda de pressão total e espuma sobre a operacionalidade de pratos dual flow.

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Distillation Troubleshooting

Cited by 72 publications

References 0 publications

Optimization-Based Design of Crude Oil Distillation Units Using Rigorous Simulation Models

Optimization-Based Design of Crude Oil Distillation Units Using Rigorous Simulation Models

Reactive Distillation for Multiple-Reaction Systems: Optimisation Study Using an Evolutionary Algorithm

Influência Da Vazão De Líquido Na Queda De Pressão Total E Na Formação De Espuma Em Um Prato Dual Flow

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