Hybrid distillation-pervaporation in a single unit: Experimental proof of concept in a batch operation

León, Juan A.; Schuur, Boelo; Fontalvo, Javier

doi:10.1016/j.seppur.2020.117464

Cited by 11 publications

(7 citation statements)

References 29 publications

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“…Separation of non-ideal azeotrope-containing mixtures is often complex and serious challenge. Therefore, there is need for hybrid process that can efficiently and economically separate azeotropic mixtures, such as pressure change, extractive, homogeneous azeotropic and heterogeneous azeotropic distillation [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ], hybrid distillation-pervaporation process [ 10 , 11 , 12 , 13 , 14 , 15 ] extractive heterogeneous azeotropic distillation (EHAD) [ 16 , 17 , 18 ] and hydrophilic or organophilic pervaporation (HPV, OPV) [ 19 , 20 , 21 , 22 , 23 , 24 ]. It can be mentioned that volatile organic compounds (VOCs) [ 25 , 26 ] can be separated from wastewater by pervaporation membranes and distillation processes, e.g., ethyl acetate-ethanol [ 27 , 28 ], acetone-butanol-ethanol [ 29 ], isobutanol [ 30 , 31 ], isopropanol [ 32 , 33 , 34 , 35 ], tetrahydrofuran (THF) [ 36 ], ethanol [ 37 , 38 , 39 ], methanol [ 35 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

2020

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It can be stated that in the fine chemical industries, especially in the pharmaceutical industry, large amounts of liquid waste and industrial waste solvents are generated during the production technology. Addressing these is a key issue because their disposal often accounts for the largest proportion of the cost of the entire technology. There is need to develop regeneration processes that are financially beneficial to the plant and, if possible, reuse the liquid waste in the spirit of a circular economy, in a particular technology, or possibly elsewhere. The distillation technique proves to be a good solution in many cases, but in the case of mixtures with high water content and few volatile components, this process is often not cost-effective due to its high steam consumption, and in the case of azeotropic mixtures there are separation constraints. In the present work, the membrane process considered as an alternative; pervaporation is demonstrated through the treatment of low alcohol (methanol and ethanol) aqueous mixtures. Alcohol-containing process wastewaters were investigated in professional process simulator environment with user-added pervaporation modules. Eight different methods were built up in ChemCAD flowsheet simulator: organophilic pervaporation (OPV), hydrophilic pervaporation (HPV), hydrophilic pervaporation with recirculation (R-HPV), dynamic organophilic pervaporation (Dyn-OPV), dynamic hydronophilic pervaporation (Dyn-HPV), hybrid distillation-organophilic pervaporation (D + OPV), hybrid distillation-hydrophilic pervaporation (D + HPV), and finally hybrid distillation-hydrophilic pervaporation with recirculation (R-D + HPV). It can be stated the last solution in line was the most suitable in the terms of composition, however distillation of mixture with high water content has significant heat consumption. Furthermore, the pervaporation supplemented with dynamic tanks is not favourable due to the high recirculation rate in the case of tested mixtures and compositions.

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Section: Introductionmentioning

confidence: 99%

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

2020

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“…In the ACM, a plug flow was used to construct the VP model and an Arrhenius-type semiempirical equation was used to describe the penetration behavior of each component across the membrane, ,− defined by J i = k i nobreak0em0.1em⁡ exp ( − E i R normalg T ) ( x i P normalF − y i P normalP ) where the two parameters E i and k i represent the apparent activation energy (kJ·mol –1 ) and permeability coefficient (kg·m –2 ·h –1 ) for a given component, respectively, determined by fitting the experimental data. P F and P P correspond to the total pressures in the feed and permeate (kPa), respectively, which varied along the membrane module.…”

Section: Methodsmentioning

confidence: 99%

A Novel Internal Coupling Process of a T-type Zeolite Membrane in a Distillation Column to Separate the PM/H₂O Mixture

Fu,

Zheng,

Huang

et al. 2024

Ind. Eng. Chem. Res.

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The recovery and purification of propylene glycol monomethyl ether (PM) could significantly enhance the economic benefits of the hydrogen peroxide to propylene oxide (HPPO) reaction to produce epichlorohydrin. However, the conventional distillation technique fails to achieve this aim due to the presence of an azeotropic mixture. To address this issue, we proposed a novel coupling process to recycle the PM component, where the membrane unit was internally embedded in the column vessel to remove water before the distillate. This concept was further verified by a designed packed column operated in batch mode. By introducing a hollow fiber T-type zeolite membrane, the PM purity in the distillate was promoted by 1.0 wt % compared with the result in the blank test, suggesting that the membrane unit improved the separation effect. To further explore the synergistic effect of the membrane unit in the internal coupling process, the process simulation was established to optimize the operation parameters of internal coupling, including membrane area, coupling position, z, and feeding stage. The results indicated that the internal coupling could efficiently achieve the defined separation target, by significantly changing the vapor–liquid equilibrium profiles. By comparing with the results in external coupling, it was found that the internal coupling method yielded a higher energy efficiency, resulting in a reduction of nearly 26% in heating energy consumption and almost 60% in condensing energy load; however, this approach required a relatively larger membrane area. The above results indicated that the internal coupling was equivalent to the external couplings, and both techniques could be used to break the azeotropic limit for separation of the PM/H2O mixture.

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“…Such a solution is representative of a hybrid separation, as defined by Stankiewicz [122]. In a series of publications, Leon and Fontalvo [123][124][125][126] presented theoretical research and experimental verification of the hybrid separation concept with the membrane inside the distillation column. They confirmed the feasibility of the PV-inside-distillation column configuration crossing the distillation boundary formed by the azeotropic point through the batch distillation experiments for separating the ethanol-isopropanol-water mixture [123].…”

Section: Vp or Pv Inside The Distillation Columnmentioning

confidence: 99%

“…In a series of publications, Leon and Fontalvo [123][124][125][126] presented theoretical research and experimental verification of the hybrid separation concept with the membrane inside the distillation column. They confirmed the feasibility of the PV-inside-distillation column configuration crossing the distillation boundary formed by the azeotropic point through the batch distillation experiments for separating the ethanol-isopropanol-water mixture [123]. Then a series of continuous separation experiments of the ethanol-isopropanol-water mixture in an experimental glass column coupled with the PV membrane was carried out, verifying this technology's theory [124].…”

Section: Vp or Pv Inside The Distillation Columnmentioning

confidence: 99%

Process intensification by integration of distillation and vapor permeation or pervaporation - An academic and industrial perspective

Liu

Kruber

et al. 2022

Results in Engineering

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Hybrid distillation-pervaporation in a single unit: Experimental proof of concept in a batch operation

Cited by 11 publications

References 29 publications

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

A Novel Internal Coupling Process of a T-type Zeolite Membrane in a Distillation Column to Separate the PM/H₂O Mixture

Process intensification by integration of distillation and vapor permeation or pervaporation - An academic and industrial perspective

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Hybrid distillation-pervaporation in a single unit: Experimental proof of concept in a batch operation

Cited by 11 publications

References 29 publications

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

A Novel Internal Coupling Process of a T-type Zeolite Membrane in a Distillation Column to Separate the PM/H2O Mixture

Process intensification by integration of distillation and vapor permeation or pervaporation - An academic and industrial perspective

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A Novel Internal Coupling Process of a T-type Zeolite Membrane in a Distillation Column to Separate the PM/H₂O Mixture