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Ethanol and Water Adsorption in Conventional and Hierarchical All-Silica MFI Zeolites by Swagata Pahari; Matheus Dorneles de Mello; Mansi S. Shah; Tyler R. Josephson; Limin Ren; Huong Giang T. Nguyen; Roger D. Van Zee; Michael Tsapatsis; J. Ilja Siepmann is a Chemistry article available to read on EtoBox.

What is Ethanol and Water Adsorption in Conventional and Hierarchical All-Silica MFI Zeolites about?

Hierarchical zeolites containing both micro- (<2 nm) and mesopores (2–50 nm) have gained increasing attention in recent years because they combine the intrinsic properties of conventional zeolites with enhanced mass transport rates due to the presence of mesopores. The structure of the hierarchical self-pillared pentasil (SPP) zeolite is of interest because all-silica SPP consists of orthogonally intergrown single-unit-cell MFI nanosheets and contains hydrophilic surface silanol groups on the mesopore surface while its micropores are nominally hydrophobic. Therefore, the distribution of adsorbed polar molecules, like water and ethanol, in the meso- and micropores is of fundamental interest. Here, molecular simulation and experiment are used to investigate the adsorption of water and ethanol on SPP. Vapor-phase single-component adsorption shows that water occupies preferentially the mesopore corner and surface regions of the SPP material at lower pressures (__P__/__P__~0~ 700 g L^–1^), the SPP material becomes selective for water over ethanol.

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Author

Swagata Pahari; Matheus Dorneles de Mello; Mansi S. Shah; Tyler R. Josephson; Limin Ren; Huong Giang T. Nguyen; Roger D. Van Zee; Michael Tsapatsis; J. Ilja Siepmann

Publisher

American Chemical Society (ACS)

Published

2021

Language

EN

Field

Chemistry (Physical Sciences)