Mixed matrix membrane of ZSM-5/poly (ether-block-amide)/polyethersulfone for pervaporation separation of ethyl acetate from aqueous solution

Vatani, Mostafa; Raisi, Ahmadreza; Pazuki, Gholamreza

doi:10.1016/j.micromeso.2017.12.030

Cited by 22 publications

(6 citation statements)

References 40 publications

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“…In this case, the diffusion of propyl acetate molecules facilitated this. As time progressed, spaces between the polymer chains increased, and water molecules could diffuse through the swollen membrane more easily and the separation factor decreased …”

Section: Resultsmentioning

confidence: 99%

“…As time progressed, spaces between the polymer chains increased, and water molecules could diffuse through the swollen membrane more easily and the separation factor decreased. 6,[18][19][20] The separation factor and flux values of propyl acetate at propyl acetate concentration of 0.1 wt% was 91 and 0.18 kg m −2 h −1 , respectively. As the propyl acetate concentration increased to 0.7 wt%, separation factor and flux values were obtained as 63 and 0.61 kg m −2 h −1 , respectively.…”

Section: Effect Of Feed Concentrationmentioning

confidence: 99%

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Concentration of aroma compounds by pervaporation process using polyvinyl chloride membrane

Ünlü

2019

Flavour & Fragrance J

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The organoleptic properties of beverage products have an important role in consumption and commercial success. Nowadays aroma recovery with high efficiency is an important process. Hydrophobic pervaporation is an alternative process for the recovery of aroma compounds in the food industry. The purpose of this study was to determine the effects of operation temperature, feed concentration, and driving force on the recovery of different aroma compounds such as propyl acetate, pentyl acetate, and octyl acetate by pervaporation. Pervaporation was operated using a Polyvinyl Chloride hydrophobic membrane. As the process temperature and the feed concentration increased, the flux increased, but separation factor values of binary aqueous solutions of the aroma components propyl acetate, pentyl acetate, and octyl acetate decreased. Polyvinyl Chloride possessed a higher separation factor value for propyl acetate than octyl acetate and pentyl acetate. This situation was also confirmed with swelling tests and solubility parameters. Low‐swelling degree results in a high separation factor. The highest separation success was observed for propyl acetate. The flux and separation factor of propyl acetate were obtained as 1.57 kg m−2 h−1 and 158, respectively. It has been found that the pervaporation is an efficient process for aroma recovery from water and that the polyvinyl chloride membrane exhibits good separation performance from the removal of propyl acetate, pentyl acetate, and octyl acetate from the water.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Feed Concentrationmentioning

confidence: 99%

Concentration of aroma compounds by pervaporation process using polyvinyl chloride membrane

Ünlü

2019

Flavour & Fragrance J

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“…As mentioned, the model research is based on empirical laboratorian data [ 10 , 14 , 15 , 16 , 17 , 18 , 19 ]. For the calculations, the following base parameters were needed: mole fraction of the feed ( x i 1 ) [mole/mole]; mole fraction of the permeate ( x i 3 ) [mole/mole]; coefficients of the Wilson equation ( A ij , A ji ) [cal/moleK]; input temperature ( T ) [°C.…”

Section: Methodsmentioning

confidence: 99%

Improvement of Component Flux Estimating Model for Pervaporation Processes

Szilágyi

Toth

2020

Membranes

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Separating non-ideal mixtures by pervaporation (hence PV) is a competitive alternative to most traditional methods, such as distillation, which are based on the vapour–liquid equilibrium (VLE). It must be said, in many cases, accurate VLE data are already well known in the literature. They make the method of PV modelling a lot more complicated, and most of the viable models are (semi)empirical and focus on component flux (Ji) estimation. The pervaporation model of Mizsey and Valentinyi, which is based on Rautenbach’s works, is further improved in this work and tested rigorously by statistical means. Until now, this type of exponential modelling was only used for alcohol–water mixtures, but in this work, it was extended to an ethyl acetate–water binary mixture as well. Furthermore, a flowchart of modelling is presented for the first time in the case of an exponential pervaporation model. The results of laboratory-scale experiments were used as the basis of the study and least squares approximation was used to compare them to the different model’s estimations. According to our results, Valentinyi’s model (Model I) and the alternative model (Model III) appear to be the best methods for PV modelling, and there is no significant difference between the models, mainly in organophilic cases. In the case of the permeation component, Model I, which better follows the exponential function, is recommended. It is important to emphasize that our research confirms that the exponential type model seems to be universally feasible for most organic–water binary mixtures. Another novelty of the work is that after PDMS and PVA-based membranes, the accuracy of the semiempirical model for the description of water flux on a PEBA-based membrane was also proved, in the organophilic case.

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“…Its synthesis relies on the typical esterification reaction of acetic acid with ethanol [ 83 , 84 ], while its separation at a low concentration from water and ethanol is needed. Initially, mixed matrix membranes based on ZSM-5/poly (ether-block-amide)/polyethersulfone were proposed by Vatani et al [ 46 ], who separated ethyl acetate from aqueous solution; the membrane loaded with 7.5 wt.% ZSM-5 had the best β value of 108 with a permeation rate of about 1.8 kg m −2 h −1 (5 wt.% ethyl acetate in feed, at 50 °C). The authors also observed an increase in permeation by raising the temperature between 30 and 50 °C associated with the increase in mass transfer driving force.…”

Section: Latest Insights Into Zeolite-based Membranes For Pervapormentioning

confidence: 99%

Pervaporation Zeolite-Based Composite Membranes for Solvent Separations

Castro-Muñoz

Boczkaj

2021

Molecules

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Thanks to their well-defined molecular sieving and stability, zeolites have been proposed in selective membrane separations, such as gas separation and pervaporation. For instance, the incorporation of zeolites into polymer phases to generate composite (or mixed matrix) membranes revealed important advances in pervaporation. Therefore, the goal of this review is to compile and elucidate the latest advances (over the last 2-3 years) of zeolite applications in pervaporation membranes either combining zeolites or polymers. Here, particular emphasis has been focused on relevant insights and findings in using zeolites in pervaporative azeotropic separations and specific aided applications, together with novel concepts of membranes. A brief background of the pervaporation process is also given. According to the findings of this review, we provide future perspectives and recommendations for new researchers in the field.

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Mixed matrix membrane of ZSM-5/poly (ether-block-amide)/polyethersulfone for pervaporation separation of ethyl acetate from aqueous solution

Cited by 22 publications

References 40 publications

Concentration of aroma compounds by pervaporation process using polyvinyl chloride membrane

Concentration of aroma compounds by pervaporation process using polyvinyl chloride membrane

Improvement of Component Flux Estimating Model for Pervaporation Processes

Pervaporation Zeolite-Based Composite Membranes for Solvent Separations

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