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Chapitre D'ouvrage Année : 2016

ZSM-5 zeolite membrane

Anne Julbe
Martin Drobek


ZSM-5 (Zeolite Socony Mobil-5, patented by Mobil oil company in 1975) is a high silica zeolite with a MFI framework structure (Mobil Five) characterized by the formula |(Na x(H 2O) 16|[Al xSi 96−xO 192], where x < 27 (International Zeolite Association-IZA). It is composed of pentasil units which are linked to form pentasil chains connected via oxygen bridges to form corrugated sheets with 10-ring holes (Fig. 1). Oxygen bridges between these sheets result in a 3-dimensional system with straight 10-ring channels parallel to the corrugations (along y) and sinusoidal 10-ring channels perpendicular to the sheets (along x). The MFI 3D framework, consisting of straight and zigzag channels, is a rather complex zeolite framework type. The structure is orthorhombic (space group Pnma) at high temperatures, but a phase transition to the monoclinic space group occurs on cooling below the transition temperature, i.e., between 300 and 350 K. Because the pore openings are 10-rings (straight channels have...


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Dates et versions

hal-01708175 , version 1 (13-02-2018)



Anne Julbe, Martin Drobek. ZSM-5 zeolite membrane. Drioli E.; Giorno L. Encyclopedia of Membranes, Springer, 2016, Encyclopedia of Membranes, 978-3-662-44323-1. ⟨10.1007/978-3-662-44324-8_615⟩. ⟨hal-01708175⟩
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