Guo J.-CZou CChiang C.-YChang T.-AChen J.-JLin L.-CDUN-YEN KANGLI-CHIANG LIN2022-03-222022-03-22202103767388https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113458392&doi=10.1016%2fj.memsci.2021.119762&partnerID=40&md5=649f8b07da39dc8722b442b049a8bbf9https://scholars.lib.ntu.edu.tw/handle/123456789/598142Membrane pervaporation is an emerging technique for the separation of water from alcohols, and zeolites with ordered ultramicropores (pore size <0.7 nm) have shown particular promise for use as membrane materials. This is the first paper to propose the use of NaP1 zeolite in membrane pervaporation. NaP1 zeolite has a GIS type topology with an 8-member ring that forms a pore limiting diameter of 3.0 ?, which is ideal for the separation of water from alcohols. NaP1 zeolite membranes with various Si/Al ratios (1.9, 3.3, and 3.9) were made via the seeded growth. Pervaporation tests were performed using an aqueous feed solution of 90 wt% ethanol or IPA at 348 K. The sample with a Si/Al ratio of 3.3 achieved separation factors surpassing most existing zeolite membranes: water/ethanol (200,000) and water/isopropanol (36,000). Nano-beam X-ray diffraction was used to map grain sizes in membrane samples, due to its role in surface hydrophilicity. State-of-the-art molecular simulations provided valuable insights into the diffusion and adsorption of water/alcohol molecules in NaP1 zeolite. From simulations, NaP1 zeolite presented a high water diffusivity and a high adsorption selectivity of water over ethanol or isopropanol. Experiment and computation results demonstrate the potential of NaP1 zeolite as a membrane material for alcohol dehydration. ? 2021 Elsevier B.V.Alcohol dehydrationNaP1 zeolitePervaporationZeolite GISZeolite membraneDehydrationEthanolEvaporationGeographic information systemsHydrophilicityMembranesPore sizeHigh selectivityIsopropanolMembrane materialMembrane pervaporationSi/Al ratioWater alcoholsZeolites2 propanolalcoholalcohol derivativealuminumnucleosome assembly protein 1siliconwaterzeoliteadsorptionArticlediffusiondiffusivityhydrophilicitymembraneparticle sizepervaporationsimulationX ray diffractionGISWaterWettability[SDGs]SDG6[SDGs]SDG13journal article10.1016/j.memsci.2021.1197622-s2.0-85113458392