Articles with "pure silica" as a keyword



Long-range exchange limit and dispersion in pure silica zeolites

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Published in 2018 at "Theoretical Chemistry Accounts"

DOI: 10.1007/s00214-018-2202-7

Abstract: The roles of the large exchange dimensionless gradient limit, s→∞, with $$s = \left| {\nabla n\left( \varvec{r} \right)} \right|/\left( {2k_{\text{f}} \left( \varvec{r} \right)n\left( \varvec{r} \right)} \right)$$s=∇nr/2kfrnr, $$k_{\text{f}} = \left( {3\pi^{2} n\left( \varvec{r} \right)} \right)^{1/3}$$kf=3π2nr1/3, and… read more here.

Keywords: limit; dispersion; exchange; left varvec ... See more keywords

Pure silica CHA-type zeolite membranes for dry and humidified CO2/CH4 mixtures separation

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Published in 2018 at "Separation and Purification Technology"

DOI: 10.1016/j.seppur.2017.12.060

Abstract: Abstract Dense and thin pure silica CHA-type zeolite (Si-CHA) membranes have been synthesized on porous α-alumina supports and investigated for CO2 permeation and CO2/CH4 separation performance under dry and humidified conditions. Si-CHA membranes with ultra-high… read more here.

Keywords: silica cha; ch4; co2 ch4; pure silica ... See more keywords

Pure Silica with Ordered Silanols for Propylene/Propane Adsorptive Separation Unraveled by Three-Dimensional Electron Diffraction.

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Published in 2023 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.2c13847

Abstract: Adsorptive separation of propylene (C3H6) from propane (C3H8), which could deal with energy-intensive cryogenic distillation technologies, remains challenging due to their similar physiochemical properties. Herein, we present a pure silica zeolite with ordered silanols (OSs),… read more here.

Keywords: separation; adsorptive separation; propane; pure silica ... See more keywords

Influence of LiCl aqueous solution concentration on the energetic performances of pure silica chabazite

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Published in 2017 at "New Journal of Chemistry"

DOI: 10.1039/c6nj03730e

Abstract: In order to study the energetic performances of different “pure silica chabazite–LiCl aqueous solution” systems, intrusion–extrusion experiments were performed under high pressure. Depending on the LiCl concentration in the aqueous medium (0 M, 5 M,… read more here.

Keywords: silica chabazite; energetic performances; licl aqueous; concentration ... See more keywords

A green route for synthesizing pure silica zeolites with six-membered rings.

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Published in 2022 at "Dalton transactions"

DOI: 10.1039/d2dt01027e

Abstract: Green routes for synthesizing pure silica zeolites are attractive but still challenging. Herein, we for the first time report a green route for synthesizing pure silica zeolites with six-membered rings (6MRs) by a combined strategy… read more here.

Keywords: silica zeolites; green route; synthesizing pure; pure silica ... See more keywords

High-pressure intrusion of double salt aqueous solution in pure silica chabazite: searching for cation selectivity

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Published in 2024 at "Journal of Applied Crystallography"

DOI: 10.1107/s1600576724002863

Abstract: Heterogeneous lyophobic systems (HLSs), i.e. systems composed of a nanoporous solid and a non-wetting liquid, have attracted much attention as promising candidates for innovative mechanical energy storage and dissipation devices. In this work, a new… read more here.

Keywords: pressure; silica chabazite; intrusion; solution ... See more keywords