Transient permeation of butanes through ZSM‐5 and ZSM‐11 zeolite membranes

Abstract

Butane isomer adsorption isotherms and diffusivities in the transport pathways through Al-ZSM-11 (MEL), Al-ZSM-5 (MFI), and B-ZSM-5 zeolite membranes were measured by

Thermal effects during adsorption of n-butane on a silicalite-1 membrane: A non-equilibrium molecular dynamics study

“…To have a better comparison between the three cases we extrapolated the equilibrium values of cases (2) and (3) (horizontal lines in the figure): during the second stage we can notice that for case (1) the loading passed from the equilibrium value of case (3) until the equilibrium value of case (2), 2.14 molecules/nm 3 in the zeolite pores. This value corresponds to 10.3 molecules per unit cell and gives a pressure in the gas phase of 2.3 bar, in good agreement with previous results from the literature, both from simulations [20] and experiments [6]. …”

“…For all these applications the dynamic behavior of the molecules inside the zeolite micropores play an essential role in determining its catalytic and separating properties. The diffusive and adsorptive properties of alkanes in zeolite molecular sieves have been the focus of numerous experimental and theoretical studies [3][4][5][6][7][8][9][10][11]. In recent years, molecular simulations have become an increasingly important tool for studying sorbates in zeolites [12][13][14][15][16][17][18][19][20].…”

Adsorption of N2 and CH4 by Ion-Exchanged Silicoaluminophosphate Nanoporous Sorbents: Interaction with Monovalent, Divalent, and Trivalent Cations

“…24 Such a parameter is difficult to estimate when the highest pressure is below saturation. 63 The estimated q sat value should be more accurate at lower temperatures because the adsorbed amount is near the saturation capacity when compared to higher temperatures at the same pressure. Such an approach would certainly reduce extrapolation errors at higher pressures.…”

Enhanced flux through double-sided zeolite membranes

“…Transport through the support was modeled allowing for contributions of Knudsen and molecular diffusion and viscous flow, as described previously [4,7,[13][14][15]. Which mechanism dominates depends on the support properties and operating conditions.…”