Multieffect distillation for thermally coupled configurations

Agrawal, Rakesh

doi:10.1002/aic.690461113

Cited by 42 publications

(30 citation statements)

References 17 publications

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“…Some of them, without the intention of a comprehensive review are: modification in the number and characteristics of vapor and liquid transfer between columns [60,61]; Simultaneous design of thermally coupled and heat integrated systems [12,[62][63][64], thermodynamic analysis [2,5,6,[65][66][67], generation and analysis of sequences with reduced number of column sections [68][69][70][71], alternatives for columns with one or multiple walls [72,73].…”

Section: Introductionmentioning

confidence: 99%

Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach

Caballero

Grossmann

2014

Computers & Chemical Engineering

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This paper introduces a novel MILP approach for the design of distillation columns sequences of zeotropic mixtures explicitly including from conventional to fully thermally coupled sequences and divided wall columns with a single wall.The model is based on the use of two superstructure levels. In the upper level a superstructure that includes all the basic sequences of separation tasks and all the possibilities of heat exchange (condensers and reboilers). In the lower level an extended tree that explicitly includes all the alternatives for a given separation task (different thermal states and compositions of the feed to a given separation task). In that way, it is possible to a priori optimize all the possible separation tasks involved in the superstructure. A set of logical relationships relates the feasible sequences (upper level) with the optimized tasks in the extended tree resulting in a MILP to select the optimal sequence. Performance of the model in terms of robustness and computational time is illustrated with several examples.

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Section: Introductionmentioning

confidence: 99%

Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach

Caballero

Grossmann

2014

Computers & Chemical Engineering

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“…We have recently learned how to draw fully thermally coupled distillation column arrangements using multiple distillation columns with only one reboiler and one condenser, which are more flexible and easier to operate (Agrawal and Fidkowski, 1998). We are also learning about double-effect and multi-effect multicomponent distillation schemes, which have the potential to reduce the already low heat demands of thermally coupled distillation schemes by 20 to 50% (Siirola, 1995;Agrawal, 2000). It is especially noteworthy that each of the energy saving arrangements described above is accompanied by decreased capital investment!…”

Section: Improvement In the Energy-efficiency Of Separation Processesmentioning

confidence: 98%

Separations: Perspective of a process developer/designer

Agrawal

2001

AIChE Journal

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“…Erika Fabiola Abad-Zarate, Juan Gabriel Segovia-Hernández*, Salvador Hernández and Agustín R. Uribe-Ramírez Universidad de Guanajuato,Facultad de Química,Noria Alta s/n,Guanajuato,Gto.,36050,México distillation sequences based on conventional columns (Triantafyllou and Smith, 1992;Hernández and Jiménez, 1999;Hernández et al, 2003;Rong et al, 2000;Blancarte-Palacios et al, 2003;Agrawal, 2000;Rong et al, 2003). Such coupled distillation sequences use thermal links that can be implemented by eliminating either a reboiler or a condenser and then introducing recycle streams in the vapour or the liquid phases, respectively.…”

Section: A Short Note On Steady State Behaviour Of a Petlyuk Distillamentioning

confidence: 99%

A Short Note on Steady State Behaviour of a Petlyuk Distillation Column by Using a Non‐Equilibrium Stage Model

et al. 2006

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A Petlyuk distillation column, considering equilibrium and non‐equilibrium stage models, was studied. Rigorous simulations were conducted using Aspen Plus™ RATEFRAC Module for the separation of ternary mixtures. According to the equilibrium model, the energy‐efficient design of the Petlyuk column requires that the intermediate component be extracted from the maximum point in the composition profile in the main column. It was found that, for the intermediate component, mass transfer occurs from the vapour to the liquid phase from the top of the column to the stage where the side stream is extracted, from this point mass transfer occurs in the opposite direction. This point, considering the non‐equilibrium model, corresponds to the stage in which the net mass transfer rate is zero. For the case of two segments per stage, it was found that the heat duties predicted by the equilibrium model are significantly lower than those obtained by using the non‐equilibrium model, which is consistent with previous reported results. However, it is important to say that despite the higher energy duty predicted by the non‐equilibrium model; both models predict significant energy savings.

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Multieffect distillation for thermally coupled configurations

Cited by 42 publications

References 17 publications

Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach

Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach

Separations: Perspective of a process developer/designer

A Short Note on Steady State Behaviour of a Petlyuk Distillation Column by Using a Non‐Equilibrium Stage Model

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