Dehydration of isopropanol by poly(vinyl alcohol) hybrid membrane containing oxygen-plasma treated graphene oxide in pervaporation process

Sadeghi, M. H.; Mortaheb, Hamid Reza; Heidar, Kourosh Tabar; Gallucci, Fausto

doi:10.1016/j.cherd.2022.05.023

Cited by 4 publications

(3 citation statements)

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“…The application of these materials in PV processes for the concentration of organic solvents has witnessed remarkable progress since the 1990s. In recent years, polymeric membranes have emerged as a promising choice for the dehydration of diverse organic mixtures, including water-alcohol (ethanol and isopropanol) [31][32][33], water-acetone [34], and water-ethylene glycol [28,35], among others [32,[36][37][38]. The incorporation of thermally stable rigid chain structures within polymer membranes enhances their ability to selectively adsorb target components [3,28], leading to an outstanding dehydration performance for aqueous mixtures of organic liquids [15,32,34].…”

Section: Polymeric Membranesmentioning

confidence: 99%

“…The selection of an appropriate filler material is critical, considering factors such as achieving a high separation performance, either through transport and separation mechanisms (molecular sieving or adsorption), and achieving a good compatibility between filler particles and the polymer matrix [17,64]. Notably, two-dimensional (2D) nanomaterials, such as graphene [35], graphene oxide (GO) [31,64], graphitic carbon nitride (g-C 3 N 4 ) [65], and MXene [66], have garnered significant attention regarding the PV dehydration of ethanol due to their unique intrinsic properties, including hydrophilicity and the presence of 2D transport channels within the stacked sheets. Heydari et al, for instance, successfully fabricated PVA/MXene membranes for the PV dehydration of ethanol [17].…”

Section: Hydrophilic Polymersmentioning

confidence: 99%

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Ongoing Progress on Pervaporation Membranes for Ethanol Separation

Imad,

Castro-Muñoz

2023

Membranes

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Ethanol, a versatile chemical extensively employed in several fields, including fuel production, food and beverage, pharmaceutical and healthcare industries, and chemical manufacturing, continues to witness expanding applications. Consequently, there is an ongoing need for cost-effective and environmentally friendly purification technologies for this organic compound in both diluted (ethanol-water–) and concentrated solutions (water-ethanol–). Pervaporation (PV), as a membrane technology, has emerged as a promising solution offering significant reductions in energy and resource consumption during the production of high-purity components. This review aims to provide a panorama of the recent advancements in materials adapted into PV membranes, encompassing polymeric membranes (and possible blending), inorganic membranes, mixed-matrix membranes, and emerging two-dimensional-material membranes. Among these membrane materials, we discuss the ones providing the most relevant performance in separating ethanol from the liquid systems of water–ethanol and ethanol–water, among others. Furthermore, this review identifies the challenges and future opportunities in material design and fabrication techniques, and the establishment of structure–performance relationships. These endeavors aim to propel the development of next-generation pervaporation membranes with an enhanced separation efficiency.

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Section: Polymeric Membranesmentioning

confidence: 99%

Section: Hydrophilic Polymersmentioning

confidence: 99%

Ongoing Progress on Pervaporation Membranes for Ethanol Separation

Imad,

Castro-Muñoz

2023

Membranes

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“…In recent times, PV has assumed an increasingly prominent role in industry applications, particularly for the separation of organic–aqueous mixtures. These applications encompass the dehydration of organic solutions such as ethanol, isopropanol, − acetonitrile, and acetic acid facilitating the attainment of enhanced purity levels. , …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of PVA Mixed Matrix Membrane Containing NaP Zeolite/Charcoal-Based Graphene Oxide Nanohybrid for Dehydration of Isopropanol by Pervaporation

Moghadasin,

Mohammadi,

Ahmadzadeh Tofighy

2023

Ind. Eng. Chem. Res.

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The present study reports the successful synthesis and integration of a hydrophilic NaP zeolite/charcoal-based graphene oxide (NaP/GO) nanohybrid into a carefully cross-linked poly(vinyl alcohol) (PVA) matrix. The mixed matrix membranes (MMMs) were fabricated by employing an environmentally friendly solvent for the purpose of dehydrating isopropanol through pervaporation (PV). The PV performance of the fabricated membranes was rigorously assessed, taking into account parameters such as the permeate flux, partial flux of components, separation factor, and pervaporation separation index (PSI). To achieve varying degrees of enhancement, the NaP/GO nanohybrid was skillfully incorporated into the PVA matrix at distinct concentrations of 0.1, 0.2, 0.3, 0.5, and 0.7 wt %. A meticulous comparison was then made between the performance of the fabricated MMMs and that of the pristine PVA membrane. Furthermore, comprehensive characterization of both the synthesized nanoparticles and fabricated membranes was conducted using advanced techniques such as field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and precise measurements of the degree of swelling (uptake) and water contact angle (WCA). Remarkably, at an elevated temperature of 50 °C, the MMM containing 0.5 wt % NaP/GO nanohybrid demonstrated superior performance, exhibiting an impressive separation factor of 343 and a notable permeate flux of 0.18 kg·m–2·h–1. In contrast, the neat PVA membrane displayed a separation factor of 201, indicating a significant improvement in the membrane performance, particularly with regard to the separation factor. The highly promising outcomes of this study suggest that the PVA MMM incorporating the NaP/GO nanohybrid holds great potential for application in critical processes, such as isopropanol purification. This novel nanohybrid-based membrane could pave the way for more efficient and sustainable separation technologies in various industrial sectors.

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