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- 저자 : Golemme, Giovanni (검색결과 2 건)
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Interfacial control in perfluoropolymer mixed matrix membranes for natural gas sweetening
Anna Santaniello,Giovanni Golemme 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.60 No.-
Defect-free mixed matrix membranes (MMMs) for natural gas separation obtained by adding SAPO-34 crystals to Hyflon® AD60X, a perfluoropolymer resistant to plasticization and tolerant to condensable hydrocarbons, are more permeable and selective (CO2/CH4 40 vs. 22) than the polymer. The experimental characterization of MMMs containing permeable and impermeable crystals of different size, shape and aspect ratio, and the macroscopic modeling of gas fluxes, allow to understand the mass transport phenomena at work. Polymer free volume increases at the interface, and barriers to the transport of gas are evidenced in the interior or on the surface of SAPO-34.
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Goo, Hyung Seo,Kim, In Ho,Rhim, Ji Won,Golemme, Giovanni,Muzzalupo, Rita,Drioli, Enrico,Nam, SangYong The Membrane Society of Korea 2004 Korean Membrane Journal Vol.6 No.1
In recent years, an increasing interest in membrane technology has been observed in chemical and environmental industry. Membrane technology has advantages of low cost, energy saving and environmental clean technology comparing to conventional separation processes. Pervaporation is one of new advanced membrane technology applied for separation of azeotropic mixtures, aqueous organic mixtures, organic solvent and petrochemical mixtures. Sodium alginate composite membranes were prepared for the enhancement of long-term stability of pervaporation performance of water-ethanol mixture using pervaporation. Sodium alginate membranes were crosslinked with CaCl$_2$ and coated with polyelectrolyte chitosan to protect washing out of calcium ions from the polymer. The surface structures of PAN and hydrolysed PAN membrane were confirmed by ATR Fourier transform infrared (FT-IR). A field emission scanning electron microscopy (FE-SEM; Jeol 6340F) operated at 15 kV. Concentration profiles for Ca in the membrane surface and membrane cross-section were taken by an energy dispersive X-ray (EDX) analyser (Jeol) attached to the field emission scanning electron microscopy (Jeol 6340F). Pervaporation experiments were done with several operation run times to investigate long-term stability of the membranes.
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