Modeling and Simulation of a Benzene Recovery Process by Extractive Distillation

Brondani, Lauren Batista; Flôres, Guilherme Braganholo; Soares, Rafael de Pelegrini

doi:10.1590/0104-6632.20150321s00002825

Cited by 11 publications

(6 citation statements)

References 9 publications

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“…Recently, ionic liquids (ILs) have gathered a great deal of attention as agents in separation processes due to their unique properties, like the possibility of fine-tuning their physical and extractive properties by a simple combination of their ions, their negligible vapor pressures, low melting points, and high thermal stability, which entail a wide liquid range allowing the ILs an easy regeneration, high selectivity, and high extraction capacity. − After approaching by liquid–liquid extraction and technically solving further purifications and the IL regeneration, − IL-based extractive distillation has been proposed as an enhancer technology with promising results able to overcome the limitations found in the liquid–liquid extraction processes. − In previous works, , the feasibility of the aromatic/aliphatic separation by extractive distillation using ILs has been proved in a simplified model composed of n -heptane and toluene. After screening the most promising ILs in the aromatic/aliphatic separation, tricyanomethanide-based ILs were selected due to their high n -heptane/toluene relative volatility, low viscosities, and high thermal stability .…”

Section: Introductionmentioning

confidence: 99%

Toward Modeling the Aromatic/Aliphatic Separation by Extractive Distillation with Tricyanomethanide-Based Ionic Liquids Using CPA EoS

Ayuso

Navarro

Palma

et al. 2019

Ind. Eng. Chem. Res.

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Extractive distillation using tricyanomethanide-based ionic liquids (ILs) has been shown to be a promising and feasible process for effectively separate aromatics from pyrolysis gasolines. The high performance of these mass agents has been reported by evaluating simple synthetic n-heptane/toluene binary mixtures, on a wide temperature and solvent to feed (S/F) ratio ranges. However, industrial streams are much more complex with the presence of other aromatic and aliphatic compounds, like benzene, xylenes, and shorter and longer linear alkanes, creating further difficulties to the separation and thus must be studied. This work covers the phase equilibrium characterization of {n-hexane + benzene + IL} and {n-octane + p-xylene + IL} ternary systems with two tricyanomethanide-based ILs, namely 1-ethyl-3-methylimidazolium tricyanomethanide ([C 2 C 1 im]-[TCM]) and 1-butyl-4-methylpyridinium tricyanomethanide ([4-C 4 C 1 py][TCM]), addressing also the phase characterization of the corresponding {hydrocarbon + IL} binary systems. The phase equilibria were determined by headspace gas chromatography (HS-GC) in a wide range of hydrocarbon compositions, temperatures and S/F ratios and modeled using the Cubic Plus Association (CPA) Equation of State (EoS). This is the first work proposing a consistent EoS model for a multicomponent separation case involving ILs, demonstrating its suitability for a wide range of conditions in binary and ternary systems.

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Section: Introductionmentioning

confidence: 99%

Toward Modeling the Aromatic/Aliphatic Separation by Extractive Distillation with Tricyanomethanide-Based Ionic Liquids Using CPA EoS

Ayuso

Navarro

Palma

et al. 2019

Ind. Eng. Chem. Res.

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show abstract

“…Process 1 was optimized to establish a reference and compared with Processes 2A and 2B. Because of the absence of concrete commercial references, the simulation of Process 1 has been based on qualitative information about the scheme of the Morphylane process available in the literature. ,,− …”

Section: Resultsmentioning

confidence: 99%

Extractive Distillation with Ionic Liquids To Separate Benzene, Toluene, and Xylene from Pyrolysis Gasoline: Process Design and Techno-Economic Comparison with the Morphylane Process

Ayuso

Navarro

Moya

et al. 2022

Ind. Eng. Chem. Res.

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Aromatic/aliphatic separation stands as a challenge for both industry and academia. More and more efforts are being made to improve energy-demanding technologies based on liquid–liquid extraction or extractive distillation processes. Recently, ionic liquid-based technologies devoted to separating benzene, toluene, and xylene from pyrolysis gasoline have been evaluated, and extractive distillation showed more potential than liquid–liquid extraction in terms of separation performance and global energy requirements. In this work, extractive distillation with ionic liquids is completely evaluated from solvent selection to rate-based process design and compared with the Morphylane benchmark process. The ILUAM database is explored through a validated COSMO/Aspen methodology to understand the impact of the ionic liquid nature on the extractive distillation operation. A parametric study focused on the extractive distillation column (EDC) is conducted for preliminary set initial guesses to design task. The final issue is centered on rigorously designing the ionic liquid-based and Morphylane processes at commercial specifications. Two different ionic liquid-based process configurations are evaluated based on the opportunities that the use of ionic liquids enables. The new process configuration working with [emim][TCM] reduces the energy costs and capital expenditures associated with the Morphylane process by 67 and 63%, respectively, along with a reduction in the solvent costs, confirming it as a cleaner alternative. In addition, a parametrization of the Cubic Plus Association equation of state (CPA EoS) obtained from the regression of experimental vapor–liquid–liquid equilibrium data is also used to simulate the EDC in equilibrium and rate-based mode. Both models provide similar results, confirming the ability of the conductor-like screening model–segment activity coefficient model as an a priori tool and the reliability of the CPA EoS as a regressive alternative to describe these kinds of complex multicomponent systems.

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“…Thermodynamic properties of components were estimated applying the non-random two-liquid (NRTL). in the current study's solvent recovery portion and UNIFAC property model utilized the missing values of NRTL 55,56 .…”

Section: Thermodynamic Models the Remainder Of Fig 1's Process Simula...mentioning

confidence: 99%

Modelling and simulation of waste tire pyrolysis process for recovery of energy and production of valuable chemicals (BTEX)

Cao

Nakhjiri

Sarkar³

2023

Sci Rep

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The pyrolysis oil fraction is highly attractive for pyrolysis products. A simulated flowsheet model of a waste tire pyrolysis process is presented in this paper. A kinetic rate-based reaction model and equilibrium separation model are created in the Aspen Plus simulation package. The simulation model is effectively proven against experimental data of literature at temperatures of 400, 450, 500, 600 and 700 °C. Also, the developed model was employed to investigate the impact of temperature on the pyrolysis procedure and demonstrated that there is an optimum temperature for chain fractions. The optimum temperature to have the highest amount of limonene (as a precious chemical product of waste tire pyrolysis process) was found 500 °C. The findings indicated that the pyrolysis process is ecologically benign, although there is still space for development. In addition, a sensitivity analysis was carried out to see how altering the heating fuel in the process would affect the non-condensable gases produced in the process. Reactors and distillation columns in the Aspen Plus® simulation model was developed to assess the technical functioning of the process (e.g., upgrading the waste tires into limonene). Furthermore, this work focuses on the optimization of the operating and structure parameters of the distillation columns in the product separation unit. The PR-BM, as well as NRTL property models, were applied in the simulation model. The calculation of non-conventional components in the model was determined using HCOALGEN and DCOALIGT property models.

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Modeling and Simulation of a Benzene Recovery Process by Extractive Distillation

Cited by 11 publications

References 9 publications

Toward Modeling the Aromatic/Aliphatic Separation by Extractive Distillation with Tricyanomethanide-Based Ionic Liquids Using CPA EoS

Toward Modeling the Aromatic/Aliphatic Separation by Extractive Distillation with Tricyanomethanide-Based Ionic Liquids Using CPA EoS

Extractive Distillation with Ionic Liquids To Separate Benzene, Toluene, and Xylene from Pyrolysis Gasoline: Process Design and Techno-Economic Comparison with the Morphylane Process

Modelling and simulation of waste tire pyrolysis process for recovery of energy and production of valuable chemicals (BTEX)

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