Efficient Energy Integration and Design of Distillation Separation Sequences

Caballero, J. A.; Javaloyes, Juan

doi:10.1016/b978-0-323-88506-5.50322-3

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…The model was demonstrated to be accurate and computationally efficient. Caballero et al 26 demonstrated the capabilities of several heat integration alternatives (e.g., reboiler/condenser heat exchange, recompression cycles, etc.) in a pressure swing distillation for acetone/chloroform separation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Heat-Integrated Distillation Sequences with Nonsharp Splits Using a Sequential Metaheuristic Method

Pavão,

Caballero,

Costa

et al. 2023

Ind. Eng. Chem. Res.

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Distillation is an energy-intensive process, and it is vital that strategies are developed to improve these processes' sustainability. Synthesis of heat-integrated distillation sequences (HIDiS) plays a vital role in such a task. By identifying and integrating heat sources and sinks within distillation sequences, these configurations enable effective heat recovery and utilization, leading to reduced energy consumption and environmental impacts. The present work presents a new superstructure-based model with a Pinch-based operator for implicit heat integration (i.e., prediction of heat integration costs) and a stochastic solution approach for developing efficient HIDiS. Explicit heat integration (definition of heat exchanger matches) is then performed in the second part of the method. Two examples in the literature were used to validate the method. In both cases, the strategy presented was able to attain solutions with better total annual costs than those from the literature (15.8 and 11.5% lower). Solutions found with the present approach presented a greater degree of heat integration than those from the literature: more heat recovery units are present with considerably greater total heat duty (about twice greater in example 1, for instance).

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Section: Introductionmentioning

confidence: 99%

Synthesis of Heat-Integrated Distillation Sequences with Nonsharp Splits Using a Sequential Metaheuristic Method

Pavão,

Caballero,

Costa

et al. 2023

Ind. Eng. Chem. Res.

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“…Caballero and Grossmann optimized sloppy split and thermally coupled configurations with heat integration but found that their formulation could not be solved to global optimality. Caballero and Javaloyes suggested a sequential approach where an identified optimal TCM configuration was further explored for opportunities to use TCH heat integration and heat pumping. Waltermann and Skiborowski used detailed thermodynamic models to optimize heat-integrated distillation train sequences, which do not scale well with the optimization problem size.…”

Section: Introductionmentioning

confidence: 99%

“…In the previous work, the authors restricted TCH to consider condensers and reboilers only at the top and bottom of each column, respectively, and calculated ρ using component relative volatilities (α) determined by fitting vapor–liquid equilibrium (VLE) data . However, it is well known that condensers and reboilers at intermediate locations can provide additional heat integration opportunities and increase heat duty benefits. ,− We partially address this limitation of the prior study by considering condensers and reboilers with final product streams, which are withdrawn as sidedraws from columns. Furthermore, though we showed that VLE-fitted α values were satisfactory for use with Underwood equations as well as ρ for use as an inverse proxy of temperature, as a means to further improve estimation of temperature ( T ) in the model, we propose a new way to determine α values for calculating ρ.…”

Section: Introductionmentioning

confidence: 99%

Identifying Heat-Integrated Energy-Efficient Multicomponent Distillation Configurations

Nogaja

Mathew

Tawarmalani

2022

Ind. Eng. Chem. Res.

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We present a tractable nonlinear programming (NLP) formulation that models a given multi-component distillation configuration and searches for its global minimum heat duty. The novelty in the current model is that it can explore feasible heat integrations with a pre-specified desired minimum approach temperature between various condensers and reboilers while simultaneously optimizing the operating conditions within the configuration. We do not use cumbersome thermodynamic models for the equilibrium temperature calculation of a saturated multicomponent mixture. Instead, we propose a modified version of the well-known Antoine equation that reduces the calculation of the temperature at a given pressure to a simple function of component mole fractions and relative volatilities while retaining the fidelity of more complex models. We explore possible heat integrations by creating a heat exchange network between column condensers, reboilers, and side draw product locations. Considering these integrations along with the heat duty minimization is essential because it is often possible to alter the operating conditions of the columns and reduce energy consumption by admitting more heat integration possibilities. Finally, we demonstrate the power of our framework in identifying optimal configurations that yield large energy savings for several four- and five-component zeotropic distillation systems.

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Efficient Energy Integration and Design of Distillation Separation Sequences

Cited by 2 publications

References 6 publications

Synthesis of Heat-Integrated Distillation Sequences with Nonsharp Splits Using a Sequential Metaheuristic Method

Synthesis of Heat-Integrated Distillation Sequences with Nonsharp Splits Using a Sequential Metaheuristic Method

Identifying Heat-Integrated Energy-Efficient Multicomponent Distillation Configurations

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