Pervaporation Performance Research Articles

Pervaporation properties of oleyl alcohol-filled polydimethylsiloxane membranes for the recovery of phenol from wastewater

In the present work, the modified polydimethylsiloxane (PDMS) membranes incorporated by oleyl alcohol (OA) were prepared for the first time. The polymeric membranes were characterized by Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), and scanning electron microscopy (SEM) before and after modification. These membranes were used for the pervaporative separation of phenol from wastewater. The effects of OA loading and feed temperature on the pervaporation performances have been investigated. The influence of ignoring the partial pressure at the permeate side was compared and discussed. The results showed that the OA presence increased phenol flux and separation factor, and decreased water flux greatly with less than 9 wt% OA loading. The highest pervaporation separation index was obtained with 5 wt% OA loading. The driving force of phenol across the membranes was much lower than that of water, and permeation of phenol was much higher than water in nature. It is necessary to discuss and compare the intrinsic properties of different membranes using permeation and selectivity, even though the membranes are tested under the same feed temperature and concentration. The partial pressure of phenol at the permeation side cannot be simply omitted for its great effect on the permeation. Increasing feed temperature will result in the increase of flux and separation factor, but decrease of permeation.

Polydimethylsiloxane (PDMS) Membrane Filled with Biochar Core-shell Particles for Removing Ethanol from Water

A new type of biochar-SiO2 core-shell particles (BCNPs) was successfully prepared via the sol-gel-sediment method. The characteristics of BCNPs were investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). This novel filler was added to a polydimethylsiloxane (PDMS) matrix to prepare composite membranes to separate ethanol from water via pervaporation (PV). The effect of BCNPs on the performance of the membranes was researched. Experimental results showed that the addition of BCNPs led to remarkably improved PV performance of composite membranes. When a BCNPs content was 5 wt.% for a 10 wt.% ethanol solution at 40 °C, the best PV performances gained were the separation factor of 11.9 and the corresponding permeation flux of 227 g·m-2·h-1.

Application of tree biochar in PDMS pervaporation membranes

AbstractIn this study, three kinds of biomass materials (lodgepole pine bark, larch wood, larch bark) were used to prepare biochar (BB), and the prepared products as fillers were mixed with polydimethylsiloxane (PDMS) for preparing composite membranes which were used for separating ethanol from water by pervaporation (PV). In accordance with the experiment results, the lodgepole pine bark BB was the best filler for the selective membrane to ethanol. The silane coupling agents NH2(CH2)3Si(OC2H5)3 (KH‐550) and CH2=CH‐Si(OCH3)3 (YDH‐171) were applied in the modification of lodgepole pine bark BB. And the separation performances of the BB/PDMS composite membranes were researched in detail. The results showed that the permeability (flux and separation factor) of composite membranes has been significantly improved with the addition of modified BB. YDH‐171 was more effective than KH‐550. The optimum PV performances (the separation factor 11.3 and the corresponding flux 227.25 g m−2 h−1) were obtained by adding 3 wt. % modified BB for a 10 wt. % and 40°C ethanol solution. This study indicated the potential application of BB nanoparticles in preparing pervaporation separation membrane.

Deep purification of seawater using a novel zeolite 3A incorporated polyether-block-amide composite membrane

Abstract In this study, a novel hydrophilic-hydrophobic composite membrane was prepared and used in a pervaporative desalination of NaCl-water solution and seawater. For this purpose, polyether block amide (PEBA) was selected as membrane matrix. Zeolite 3A was incorporated to PEBA polymer for facilitating the water permeation through the membrane. The surface morphologies of the pristine and composite membranes were examined by scanning electron microscopy. Thermogravimetric analyses of the pristine and composite membranes were performed by adjusting the zeolite 3A concentration in the PEBA polymer. The effect of the zeolite addition on membrane’s surface hydrophilicity was analyzed using contact angle measurement. Firstly, influences of zeolite content, feed temperature and NaCl concentration on pervaporative desalination performances were performed in the pervaporation of NaCl-water solution. All membranes exhibited excellent performance, and the salt rejection of >99.5% and flux of >2.07 kg m −2 h −1 were achieved. Secondly, seawater desalination was performed. Effect of zeolite addition at a given temperature was also investigated. The better salt rejection was obtained as 99.81% accompanied with a very good flux of 4.57 kg m −2 h −1 in pervaporative seawater desalination at 40 °C using 20 wt.% zeolite 3A incorporated membrane.

High-performance silicalite-1 membranes on porous tubular silica supports for separation of ethanol/water mixtures

Abstract Production of bioethanol, a renewable energy source, is limited by the costly, energy-consuming concentration processes involved. Membrane separation techniques have emerged as promising alternatives to overcome these limitations. In this study, silicalite-1 zeolite membranes with high pervaporation (PV) performance were prepared on porous tubular silica supports by a secondary growth method. The effects of the deposited seed amount on the support and synthesis parameters, namely, the tetra- n -propylammonium concentration (TPA + /Si), alkalinity (OH − /Si), and crystallization time, were investigated. A dense zeolite layer was formed between the typical columnar crystal layer of silicalite-1 membranes and the silica support. The PV performance was mainly dependent on the thickness of the dense layer: as the thickness increased, the separation factor increased. The silicalite-1 membrane prepared using a synthesis solution with a molar composition of 1SiO 2 :0.05TPABr:0.08NaOH:75H 2 O at 433 K for 8 h exhibited the highest separation performance with a separation factor of 92 and a flux of 3.00 kg m −2 h −1 for 10 wt% ethanol/water mixtures at 323 K, which is the best result reported to date for tubular supports. Thus, silica supports proved to be suitable for the preparation of high-performance silicalite-1 membranes for ethanol/water mixture separation.

Pervaporative performance of polydimethylsiloxane–graphene/polyethersolfune hybrid membrane: Effects of graphene structure and surface properties

Graphene was produced either by chemical reduction of graphene oxide (GO) using hydrazine hydrate (HG)/sodium borohydride (BG) or by straight electrochemically exfoliation of graphite (EG). The X-ray diffraction and Raman spectroscopy confirmed smaller in-plane crystalline sizes for the chemically produced graphenes, and more number of layers and therefore lower structural defects for the EG sample.The graphene samples were used to prepare polydimethylsiloxane (PDMS)–graphene (G)/polyethersulfone (PES) hybrid membranes to investigate their pervaporative performances. All three produced hybrid membranes had better separation performances for removal of phenol from water in terms of phenol flux and selectivity compared to the unfilled membrane (1.3g/m2h and 11.09, respectively). An appropriate interfacial structure for the BG- and HG-filled membranes (having lower number of layers) was achieved at 0.2wt% graphene content while for the EG-filled membrane, it was attained at 0.4wt% graphene content. PDMS–BG/PES had the highest phenol flux of 3.6g/m2h due to the lowest carboxylic functional groups and highest C/O ratio of the filler, and PDMS–HG/PES had the best selectivity of 40.02 due to the lowest C/O ratio of the filler and hence the lowest water flux.

The preparation of polyamide/polyacrylonitrile thin film composite hollow fiber membranes for dehydration of ethanol mixtures

Abstract In this study, Polyamide (PA)/polyacrylonitrile (PAN) thin-film composite (TFC) hollow fiber membranes were fabricated to investigate the dehydration performances of ethanol mixtures by pervaporation. Amine monomers (ethylenediamine (EDA), 1, 6-hexanediamine (HDA), diethylenetriamine (DETA), and tetraethylenepentamine (TEPA)) with difference number of functional groups or chain length were selected to react with trimesoyl chloride (TMC) to prepare a PA dense thin-film onto the surface of asymmetric PAN hollow fiber membranes by way of interfacial polymerization. Attenuated total reflection infrared spectroscopy (FTIR-ATR), scanning electron microscope (SEM), atomic force microscope (AFM), light transmission, contact angle and positron annihilation spectroscopy (PAS) were used to characterize the physicochemical properties, morphologies and microstructure of the PA thin layer. The pervaporation performances of aqueous ethanol solution showed the permeation flux decreased while water content in permeate increased with increasing number of amine groups. The effects of monomer concentration and reaction time on the pervaporation performances of aqueous ethanol solution through TEPA-TMC/PAN TFC hollow fiber membranes were also investigated. A 342.0 ± 22.3 g/m 2 h permeation flux and 97.6 ± 0.3 wt.% water content in permeate were obtained for the pervaporation of 90 wt.% aqueous ethanol solution at 25 °C through the PA/PAN TFC hollow fiber membrane which was fabricated by immersing PAN hollow fiber membrane into 2 wt.% TEPA aqueous solution for 1 min and then contacting 1 wt.% TMC solution for 0.5 min.

Tunable physicochemical properties of PVA nanocomposite membranes for enhanced pervaporation performance

This study reveals the effect of hydrophilic bentonite nanoclay on the pervaporation separation of azeotropic composition of water and 1,4‐dioxane. The permselectivity of the membrane increased with filler concentration and was selective toward water at minimum filler loading. The intrinsic properties such as membrane permeance and selectivity increased with the concentration of hydrophilic bentonite nanoclay and crosslinked poly(vinyl alcohol) (PVA) with 2 wt% nanoclay membranes showed intrinsic selectivity 443 (532% increment than that of pristine membranes) with water permeance 4,675 gas permeation unit which is significantly higher compared to earlier literature. X‐ray diffraction and Transmission electron microscopy showed the well exfoliated and distributed nanoclay structure in the crosslinked PVA matrix. Interaction of PVA with nanoclay and the hydrophilic character of the membranes were characterized by Fourier transform infrared spectra and contact angle analysis, respectively. Interestingly, in this work the membranes exhibited simultaneous increment in both permeation flux and selectivity with filler loading, rather than the usual inverse trend of flux and selectivity. A predictive model of pervaporation was used to explain the pervaporation behavior and it showed good agreement with experimental results for overall pervaporation performance, preferential sorption of water, and hydrophilic‐hydrophobic nature of the membranes. POLYM. ENG. SCI., 58:849–858, 2018. © 2017 Society of Plastics Engineers

In-situ generation of iron-dopamine nanoparticles with hybridization and cross-linking dual-functions in poly (vinyl alcohol) membranes for ethanol dehydration via pervaporation

Abstract In this study, poly (vinyl alcohol) (PVA) hybrid membranes with iron-dopamine (Fe-DA) nanoparticles were fabricated by the in-situ complex cross-linking method between Fe-DA nanoparticles and the PVA matrix. Based on the molecular structure feature of DA and the chelation interaction between Fe 3+ and PVA chains, the Fe-DA/PVA hybrid membranes demonstrated superior hydrophilicity, higher mechanical strength, swelling resistance, and high separation performance for ethanol dehydration via pervaporation (PV) technology. Fe-DA/PVA hybrid membranes were characterized by a scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, an X-ray diffractometer (XRD), thermo gravimetric analysis (TGA), a mechanical test, and water contact angle measurement. The effects of Fe-DA nanoparticle size, loading level, operation temperature, and the feed compositions of PVA hybrid membranes on PV performance were explored. Accordingly, the hybrid membranes exhibited excellent water permeability and selectivity for water/ethanol mixture separation. Especially, the permeability flux of the Fe-DA 30 /PVA hybrid membranes could reach 995 g/(m 2 h), and the separation factor was as high as 2980 under 90 wt% ethanol at 30 °C. The Fe-DA 30 /PVA hybrid membranes exhibited excellent potential in the PV application of ethanol dehydration.

A study on the effect of cross-linkers on pervaporation performance of room temperature vulcanised silicone rubber membranes for butanol recovery

ABSTRACTAs a rising membrane separation technology, pervaporation (PV) has been regarded as one of the most promising separation technology applied in separation of azeotropic mixtures due to its high selectivity and low energy consumption. In a PV process, separation process mainly occurs in the PV membrane, so it is of significance to develop a membrane with high performance. Room temperature vulcanised (RTV) silicone rubber is a kind of membrane material possessing good hydrophobicity and low glass transition temperature. It is widely used in the recovery of organic compounds from their dilute aqueous solutions. In this paper, RTV silicone rubber membranes were fabricated by a typical one-pot method and characterised by Fourier transform infrared spectroscopy, thermal gravimetric analysis, water contacting angle, differential scanning calorimetry, scanning electron microscopy and swelling experiment. The membranes were used in PV recovery of n-butanol from its dilute aqueous solution (about 1 wt-%). The influences of temperature and cross-linkers on the performance of PV were discussed at the same time. In conclusion, RTV silicone rubber membrane cross-linked by vinyltrimethoxysilane (WD-21), which obtained membrane selectivity of 82.9 with butanol permeability of 1.1 × 106 Barrer at 50°C, got the best performance.

Effect of embedded activated carbon nanoparticles on the performance of polydimethylsiloxane (PDMS) membrane for pervaporation separation of butanol

BACKGROUND The pervaporation separation method is considered to be a promising technique for biobutanol recovery from fermentation broths. In this work, activated carbon nanoparticles were embedded in polydimethylsiloxane (PDMS) membranes to improve the pervaporation performance. RESULTS Adding 6 wt% nano-additives in PDMS membranes increased the flux and separation factor by 42.6% and 51.9%, respectively, compared with neat membranes at 37°C. Enhanced performance is due to: 1 the presence of additional sorption sites within the membrane with a high affinity for butanol; and 2 the porous structure of the nanofillers generate new pathways for facilitated mass transport through the membrane. The effect of the operating temperature and particle concentration on membrane performance was investigated. Membrane performance improved with an increase in the operating temperature. Higher temperature resulted in increased free volume in the PDMS chains leading to higher diffusion of butanol. Mechanical tensile tests showed that nanocomposite membranes have better mechanical stability in comparison with neat PDMS membranes with the best performance observed at 6 wt% of the nano-additives. CONCLUSION The presence of activated carbon nanoparticles in the matrix of PDMS membranes leading to higher flux and separation factor can be beneficial for pervaporation separation of butanol from fermentation broths. © 2017 Society of Chemical Industry

Synthesis and characterization of polyelectrolyte complex membranes for the pervaporation separation of water–isopropanol mixtures using sodium alginate and gelatin

Using a solution technique, polyelectrolyte complex (PEC) membranes were prepared by the complexation of sodium alginate (SA) with gelatin (Ge). The physico-chemical properties of these PEC membranes were studied by Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The pervaporation characteristics of membranes were investigated with water–isopropanol mixtures. The effects of Ge content and feed compositions on the pervaporation performance of the membranes were analyzed. The data thus obtained were employed to explain permeation behavior of water and isopropanol through PEC membranes. The experimental results showed that the membrane containing 10 mass% of Ge exhibits the highest separation selectivity of 4277 with a flux of 8.47 × 10−2 kg/m2 h at 30 °C for 10 mass% of water in the feed. The total flux and flux of water are found to be overlapping each other, particularly, for PEC membranes, manifesting that the developed membranes could be used effectively to break the azeotropic point of water–isopropanol mixtures. From the temperature dependent diffusion and permeation values, the Arrhenius activation parameters were estimated. The activation energy values obtained for water permeation (E pw) are significantly lower than those of isopropanol permeation (E pIPA), suggesting that the Ge-incorporated membranes have higher separation ability for water–isopropanol system. The negative heat of sorption (∆H s) values was obtained for all the membranes, suggesting that Langmuir’s mode of sorption is predominant.

Coupling of in-situ pervaporation for the enhanced esterification of propionic acid with isobutyl alcohol over cenosphere based catalyst

In the present work, pervaporation assisted esterification of propionic acid and isobutyl alcohol, to produce isobutyl propionate and water was investigated in an in-situ type pervaporation reactor. A commercial polymeric hydrophilic PVA-PES membrane was used to shift the conversion of equilibrium limited esterification reaction by the removal of water from the reaction mixture. Catalyst developed from cenosphere (waste material) was used in the study. The effects of process parameters viz; reaction temperature, catalyst loading, alcohol/acid molar ratio and a ratio of effective membrane area to initial reaction volume (S/V) were studied.Catalyst characterization elucidated that the catalyst exhibited significant silica content, surface acidity with a considerable surface area. The membrane showed a significant selectivity towards the water removal which subsequently enhanced the pervaporation performance. A substantial enhancement in the conversion of esterification reaction from 67% to 88% was observed by the incorporation of pervaporation at a temperature of 353K. The membrane and catalyst revealed a significant stability up to four and three reaction runs respectively. Results revealed that all process parameters linearly affected the conversion and permeate flux of pervaporation assisted esterification. The maximum esterification conversion was obtained to be 92% at a reaction temperature of 353K, catalyst loading of 20g/L, alcohol/acid molar ratio of 2.5 and S/V ratio of 19.63m−1.

Pervaporative performance of PEBA and PDMS based commercial membranes in thiophene removal from its binary mixtures with hydrocarbons

This work describes vacuum pervaporation tests which were performed to identify the influence of five hydrocarbons typically presented in gasoline, i.e. n-hexane, n-heptane, n-octane, isooctane (2,2,4-trimethylpentane), and 1-octene on thiophene removal efficiency from hydrocarbon/thiophene binary mixtures. Commercial hydrophobic PEBA-based and PDMS-based composite membranes were applied. The impact of process parameters such as feed temperature and feed composition was examined. Experiments performed with various hydrocarbon confirmed, that the membrane performance and overall separation efficiency is influenced by the physiochemical properties of the mixture components (solute and solvent) and the differences in the affinities towards a given membrane. Permeate fluxes and corresponding separation factors presented typical trade-off regardless the type of membrane and solvent. The separation factors were higher in the case of the PEBA membrane which corresponded with the Hansen's Solubility Parameters Theory. The batch pervaporation removal of thiophene from isooctane was also modeled, proving that the PEBA membrane is more effective than the PDMS one. Solvents fluxes were 3 orders of magnitude higher than solute ones, therefore Pervaporation Separation Index (PSI) should be used only as a preliminary assessment of the membrane performance.

Fabrication of a novel polyhedral oligomeric silsesquioxanes/polyether‐block‐amide nano‐hybrid membrane for pervaporative separation of model fuel butanol

ABSTRACTThe present study reports the pervaporative separation capability of the pristine and polyhedral oligomeric silsesquioxanes (POSS) loaded hybrid polyether‐block‐amide (PEBA) membranes for n‐butanol recovery from the dilute n‐butanol–water mixtures. It is the first study to produce POSS‐loaded PEBA membranes for n‐butanol recovery. The morphology and crosslinking structure of the pristine and hybrid membrane were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. The thermal stability and crystallization behaviors of the pristine and hybrid membranes were investigated using thermogravimetric analysis and differential scanning calorimetry methods. Swelling experiments were also done to determine the affinity of the membranes to the n‐butanol–water mixture. The effect of increasing amount of POSS on pervaporation performance was investigated in terms of flux and the n‐butanol separation factor at 40 °C and a given n‐butanol. All the hybrid membranes exhibited high flux and n‐butanol separation factor than that of the pristine PEBA membrane. The best n‐butanol separation factor of 27.2 was obtained accompanied with 1.33 Kg m−2 h−1 of flux, when the POSS amount was 4 wt %. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45211.

Development of mesoporous carbon incorporated hybrid membranes for separation of azeotropic mixtures by pervaporation

Using a solution technique, tetraethylorthosilicate crosslinked hybrid poly(vinyl alcohol) membrane was prepared. The membrane was further incorporated with 0, 10, 20, and 30 mass% of mesoporous carbon and the membranes thus obtained were designated as M‐1, M‐2, M‐3, and M‐4, respectively. The physico‐chemical properties of these membranes were investigated using Fourier transform infrared spectroscopy, wide‐angle X‐ray diffraction, differential scanning calorimetry, thermogravimetry analysis, and scanning electron microscopy. The effects of mesoporous carbon and feed composition on pervaporation performance of the membranes were systematically investigated. The membrane M‐4 exhibited the highest separation factor of 4,082 with a flux of 1.93 × 10−2 kg/m2h at 30°C for 10 mass% of water in the feed. Total flux and flux of water are overlapping each other, manifesting that these membranes could be used to break the azeotropic point of water‐isopropanol mixtures effectively. From the temperature dependent diffusion and permeation values, the Arrhenius activation parameters were estimated. The positive heat of sorption values was obtained for M‐1, M‐2, and M‐3, suggesting that Henry's mode of sorption is predominant, giving an endothermic contribution. On the contrary, membrane M‐4 exhibited negative ΔHs value suggesting that the sorption process was dominated by exothermic contribution. POLYM. ENG. SCI., 58:405–415, 2018. © 2017 Society of Plastics Engineers

High-flux thin-film composite polyelectrolyte hydrogel membranes for ethanol dehydration by pervaporation

A thin-film composite (TFC) membrane for ethanol dehydration by pervaporation with a very high flux and a moderately high separation factor was fabricated using a strong polyelectrolyte hydrogel as an active layer. The thin-film hydrogel was graft-polymerized with vinyl sulfonic acid (VSA) as the polymer monomer and N, N′-methylenbisacrylamide (MBAA) as the cross-linker monomer, employing the UV photo-initiation method on a polyethersulfone ultrafiltration support. The successful grafting was confirmed by ATR-FTIR, and AFM and SEM studies showed that TFC membranes with an active layer of 100–300nm were fabricated. The IEC of the active layer increased up to ca. 3meq/g when the cross-linker fraction was changed from 1% to 5% MBAA and then decreased at 10% MBAA, probably due to the high cross-linker fraction in the active layer. The degree of swelling decreased with the cross-linker concentration and with the duration of the UV irradiation.The pervaporation performance of the TFC membranes was studied with a 90% ethanol solution at 50°C. The separation factor coincided with the increase in the IEC, which is attributed to the higher sorption of water molecules to the active layer. The degree of swelling had a lesser influence on the membrane performance than the IEC, but greater swelling decreased the performance for similar IEC values. The optimal membrane with a 7.5kgm−2 h−1 flux and a separation factor of 313 was obtained at the highest IEC and a limited degree of swelling, making it one of the membranes with the highest pervaporation separation index reported to date. However, the stability of the membrane should be improved, as its high performance decreased after 24–48h and reached a plateau after a few days of operation.

An Organoselective Zirconium‐Based Metal–Organic‐Framework UiO‐66 Membrane for Pervaporation

A UiO‐66 membrane was synthesized on an Al2O3 support by an in situ solvothermal method with a coordination modulation technique. We first confirmed the organic selectivity of the UiO‐66 membrane for methanol, ethanol, and acetone in mixtures with water. The membrane displayed highly stable pervaporation performance during the test and exhibited a separation factor of approximately 4.3 and a flux of 1.28 kg m–2 h–1 in ethanol/water. From the water and ethanol vapor adsorption measurement, the water uptake was lower in a binary system than that in a single system, although the ethanol uptake was similar for the binary and single systems. Therefore, the ethanol selectivity of the UiO‐66 membrane can be attributed to the preferential adsorption of the organic compound rather than water, as confirmed by a binary‐vapor adsorption measurement.

Synthesis, characterization and application of PVA/ionic liquid mixed matrix membranes for pervaporation dehydration of isopropanol

Abstract In this study, polyvinyl alcohol (PVA)–ionic liquid (IL) membranes were prepared for the separation of isopropyl alcohol (IPA)–water azeotropic mixtures by pervaporation. PVA-IL composite membranes were prepared by simple solvent evaporation method using four ILs, viz. , 1- n -butyl-3-methylimidazolium chloride (BMIMCl), 1-hexyl-3-methylimidazolium chloride (HMIMCl), 1-hexyl-3-methylimidazolium tetrafluoroborate (HMIMBF4) and 1-octyl-3-methylimidazolium chloride (OMIMCl). Three ILs were used to study the effect of alkyl chain on the pervaporation performance. The study had focused on the effect feed water concentration from 10%–40% and effect of feed temperature from 50–80 °C. Physiochemical properties of all the membranes were studied using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and contact angle measurement. The Arrhenius activation energies for permeation were estimated to be in the range 4–12 kJ·mol − 1 from the temperature dependent permeation values.

Chitosan/ZIF‐8 Mixed‐Matrix Membranes for Pervaporation Dehydration of Isopropanol

AbstractZeolitic imidazolate frameworks (ZIF‐8) nanoparticles were successfully synthesized and embedded into a chitosan (CS) polymeric matrix to prepare CS/ZIF‐8 mixed‐matrix membranes (MMMs) in order to investigate the effect of ZIF‐8 addition as novel filler on the dehydration performance of the CS polymeric membrane. MMMs were evaluated using pervaporation (PV) dehydration of isopropanol (IPA). The synthesized ZIF‐8 nanoparticles and MMMs were characterized by X‐ray diffraction, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Fourier transform infrared spectroscopy, and a swelling study. The PV performance of the prepared MMMs with different ZIF‐8 loadings for IPA dehydration was investigated. For the ZIF‐8/CS MMMs, at the optimum loading the total flux increases significantly with low separation factor reduction. The good PV performance of the ZIF‐8‐incorporated CS membranes for dehydration of IPA is demonstrated.