Using feasible regions to design and optimize reactive distillation columns with ideal VLE

Hoffmaster, Warren R.; Hauan, Steinar

doi:10.1002/aic.10765

Cited by 17 publications

(14 citation statements)

References 17 publications

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“…x q and i i i j j j i i i j j j (27) In eq 26, Γ k is the activity coefficient of group k at the mixture composition, and Γ k i is the activity coefficient of group k at a group composition corresponding to pure component i. Γ k and Γ k i are given by: To calculate the detailed compositions of the two phases, a combination of the phase-equilibrium equation and the massbalance equation is necessary. The mass-balance equation is given by…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Thus, the evaporation mechanism in Verhees et al’s work, which is referred to as the “simplified model” in this article, causes certain errors in the simulation results. Vapor–liquid equilibrium (VLE) theory is the common evaporation mechanism used to describe multicomponent evaporation and is widely used in distillation processes. − …”

Section: Introductionmentioning

confidence: 99%

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Simulation of the Evaporation Tube Banks in the Convection Section of a Steam Cracking Furnace Using an Evaporation Model

Yuan

Peng

et al. 2017

Ind. Eng. Chem. Res.

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Simulation of the evaporation process of a naphtha feedstock in the convection section of a steam cracking furnace is reported in this article. A two-step evaporation model was developed to determine component changes in the vapor and liquid phases. First, a feedstock-simplifying method, based on the work of Eckert and Vaněk (Comput. Chem. Eng.200530343356), was developed in which the original hydrocarbon mixture is represented by a system of real components. Second, the component distribution was determined by vapor–liquid equilibrium theory, using an activity coefficient method. The group contribution method (GCM) was employed to calculate the interaction parameters in the activity coefficient method. Using a mechanistic heat-transfer method, a comparison was made between the evaporation model developed in this work and a simplified evaporation model. The simulation results are in good agreement with industrial data. Some parameter profiles for the heat-transfer process are provided, as are the flow patterns of the naphtha feedstock.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of the Evaporation Tube Banks in the Convection Section of a Steam Cracking Furnace Using an Evaporation Model

Yuan

Peng

et al. 2017

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The reaction is considered only to occur in the liquid phase with a negligible heat of reaction and ideal vapor-liquid equilibrium behavior at atmospheric pressure. The specifications for column operation are taken from Hoffmaster and Hauan (2006), where the goal is to convert a pure 2-pentene feed into product streams of 2-butene and 3-hexene with a purity of at least 98 mole percent using a feed flow of 2 kmol/h and a distillate to feed ratio of 0.5.…”

Section: Methodsmentioning

confidence: 99%

Performance Indicators in Reactive Distillation Design

Filipe¹,

Matos²,

Novais³

2009

Chemical Product and Process Modeling

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A cost indicator for the design and multi-objective optimization of reactive distillation columns, designated capacity, was introduced in previous work by the authors. The question of this indicator's effectiveness as a measure of the actual column cost, is herein investigated over a number of designs by comparing it with the value obtained by means of conventional costing procedures. The results show that the level of accuracy obtained when using capacity is satisfactory and certainly acceptable for a preliminary design stage.

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“…Ideal reactive distillation processes15, 16 offer a continuous spectrum in studying the process behavior by stripping away all the non‐ideal phase equilibrium and specific reaction rates. The design of ideal reactive distillation has been explored17–19 and comparison to conventional multiunit recycle processes has been made for specific systems 15, 20. Tung and Yu21 studied the effects of relative volatility rankings to the stoichiometric design of ideal reactive distillation processes.…”

Section: Introductionmentioning

confidence: 99%

Design and control of an ideal reactive divided‐wall distillation process

Wang

Huang

2011

Asia-Pacific J Chem Eng

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Reactive distillation and divided-wall distillation are two promising technologies achieving substantial economical benefits from process intensification. In this study, a novel reactive divided-wall distillation process, procuring technical advantages from both reactive distillation and divided-wall distillation, is designed with different degrees of thermal coupling to achieve possible energy saving for an ideal quaternary reaction system with the least favorable relative volatility ranking under excess-reactant design. Simulation results demonstrate that reactive divided-wall distillation can provide better energy efficiency than reactive distillation without thermal coupling. Energy efficiency increases with the degree of thermal coupling.Proper selection and pairing of controlled and manipulated variables chosen for three control objectives are determined by using steady-state analysis. Temperature control in the reactive distillation column is used to maintain reactant inventory in the process. Product purities are maintained by the temperature control loops in the divided-wall column. Stage temperatures that have modest sensitivity to manipulated variables and have little variations with respect to throughput rate changes are selected as controlled variables. Dynamic tests show that the proposed control scheme can maintain high product purity and stoichiometric balance between the reactant feeds for throughput rate changes.

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Using feasible regions to design and optimize reactive distillation columns with ideal VLE

Cited by 17 publications

References 17 publications

Simulation of the Evaporation Tube Banks in the Convection Section of a Steam Cracking Furnace Using an Evaporation Model

Simulation of the Evaporation Tube Banks in the Convection Section of a Steam Cracking Furnace Using an Evaporation Model

Performance Indicators in Reactive Distillation Design

Design and control of an ideal reactive divided‐wall distillation process

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