Optimized distillation coupled with state-of-the-art membranes for propylene purification

Zarca, Raúl; Ortiz, Alfredo; Gorri, Daniel; Biegler, Lorenz T.; Ortíz, Inmaculada

doi:10.1016/j.memsci.2018.04.016

Cited by 33 publications

(22 citation statements)

References 43 publications

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“…The NPVC of both membrane processes and the base case distillation are itemized in Table 6. The results reveal the prominent potential of T A B L E 5 Optimization results of the multistage processes The cost data included in Table 6 for the distillation column correspond to the base case reported in our previous article, 29 that is, for a distillation column without heat integration. However, OPEX could be overestimated since the distillation columns can be heat integrated.…”

Section: Npvc Comparisonmentioning

confidence: 84%

“…The first one involves the use of membrane modules along with new or existing distillation columns to create a hybrid process that reduces the required reflux ratio and its associated expenses. [27][28][29][30][31] The second approach achieves complete replacement of the distillation column with membrane technology by designing and optimizing appropriate multistage/multistep membrane processes. 32,33 In particular, several trade-offs should be balanced when designing a multistage membrane process based on facilitated transport membranes.…”

Section: Introductionmentioning

confidence: 99%

“…based on the design parameters presented elsewhere 29. b calculated according to the "Guthrie's Modular Method for Costing and Sizing.…”

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confidence: 99%

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Optimization of multistage olefin/paraffin membrane separation processes through rigorous modeling

et al. 2019

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In this work, we explore the capabilities of an NLP optimization model to determine the viability of facilitated transport membrane processes intended to replace traditional distillation currently employed for propane/propylene separation. An NLP optimization model for multistage membrane processes has been formulated, introducing the mathematical description of the facilitated transport mechanisms in the PVDF-HFP/BMImBF 4 /AgBF 4 membranes previously developed by our research group. For the first time, a simultaneous optimization of the process and the membrane material (i.e., carrier concentration) has been performed, thanks to the implementation of the governing equations for the fixed site and mobile carrier mechanisms. Once the model is solved in GAMS it returns the optimal membrane area, carrier loading and permeate pressure of each stage based on Net Present Value Cost (NPVC) minimization. Different process flow sheets were evaluated and the results show prominent reductions on NPVC for facilitated transport multistage processes when compared to distillation.

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Section: Npvc Comparisonmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Optimization of multistage olefin/paraffin membrane separation processes through rigorous modeling

et al. 2019

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“…As presented by Zarca et al , the mathematical description of each membrane unit deals with isothermal operation in steady state, with the feed stream introduced in the shell side of the fibers and the permeate circulating in the lumen side. Plug flow is assumed on both sides with a co‐current configuration.…”

Section: Hybrid Separation Systemsmentioning

confidence: 99%

Nonlinear Optimization Strategies for Process Separations and Process Intensification

Biegler

2020

Chemie Ingenieur Technik

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Advanced nonlinear programming (NLP) strategies based on equation-oriented (EO) process models are leading to significant improvements in computer-aided process engineering. The EO paradigm allows the development of large, integrated optimization platforms that expand the scope of continuous optimization tasks in process engineering. In particular, these platforms deploy significantly faster NLP strategies than in commercial simulation tools. Moreover, they exploit exact derivatives and system structure in order to consider much larger and more challenging systems. Finally, they allow the incorporation of much more general models, such as multi-level optimization and complementarity constraints. For process optimization this allows the treatment of extended models for complex phase equilibrium and process separations. These advances facilitate the optimization of novel integrated systems that arise in process intensification. Several separation case studies are presented that illustrate these optimization concepts and demonstrate their effectiveness for hybrid membrane/distillation separations and reactive distillation systems that typify novel systems in process intensification.

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“…6,8,9 Membrane processes have been proposed to save energy in the separation section by replacing or integrating with the current cryogenic distillation technology. [10][11][12][13][14][15][16][17] Membrane technology has achieved very promising results, specifically regarding the olefin/paraffin separations. [18][19][20][21][22][23][24] In a recent study, Lee et al 25 identified the optimum membrane performance required to replace one typical C3 splitter.…”

Section: Introductionmentioning

confidence: 99%

A Perspective of Solutions for Membrane Instabilities in Olefin/Paraffin Separations: A Review

Campos

Reis

Ortiz

et al. 2018

Ind. Eng. Chem. Res.

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Light olefins are mainly produced by naphtha steam cracking, which is among the more energy intensive processes in the petrochemical industry. To save energy, some alternatives have been proposed to partially replace or combine with cryogenic distillation the conventional technology to separate olefins and paraffins. Within this aim, facilitated transport membranes, mainly with Ag + cations as selective carriers, have received great attention owing to the high selectivity and permeance provided. However, to be used industrially, the undesirable instability associated with the Ag + cation should be considered. Poisonous agents and polymer membrane materials are sources of Ag + deactivation. In recent years, great achievements on the separation performance have been reported, but the current challenge is to maintain the selectivity in long-term separation processes. This work presents a critical analysis of the potential causes of Ag + deactivation and points out some alternatives that have been proposed to overcome the hurdle. This review highlights and critically analyses some perspectives of the ongoing development and application of facilitated transport membranes.

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Optimized distillation coupled with state-of-the-art membranes for propylene purification

Cited by 33 publications

References 43 publications

Optimization of multistage olefin/paraffin membrane separation processes through rigorous modeling

Optimization of multistage olefin/paraffin membrane separation processes through rigorous modeling

Nonlinear Optimization Strategies for Process Separations and Process Intensification

A Perspective of Solutions for Membrane Instabilities in Olefin/Paraffin Separations: A Review

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