Silica Membranes Application for Hydrogen Separation

An atomistic perspective on the diffusion and permeation of hydrogen and isotopes through an engineered nanoporous silica membrane using molecular dynamics simulations

“…The measured permeability of H 2 through the silica membrane was observed to be in good agreement with the earlier studies. 31,37…”

“…The measured permeability of H 2 through the silica membrane was observed to be in good agreement with the earlier studies. 31,37 3.3 Effect of temperature and pressure on H 2 permeation Fig. 4(a) represents the calculated temperature dependency of hydrogen gas permeability for the 2.0 g cm −3 density model.…”

“…5,26 However, most of these studies are conducted with either noble gas or hydrocarbon gas molecules, [27][28][29] and only a few studies are available on the permeability of hydrogen gas through silica membranes. 12,[30][31][32] Also, the reported performance data on gas permeability, selectivity, or activation energy are rather inconsistent. 9,[27][28][29][30][33][34][35][36] In literature, the variable H 2 permeance through silica membranes ranging from 10 −9 mol m −2 s −1 Pa −1 to 10 −6 mol m −2 s −1 Pa −1 has been reported.…”

“…9,[27][28][29][30][33][34][35][36] In literature, the variable H 2 permeance through silica membranes ranging from 10 −9 mol m −2 s −1 Pa −1 to 10 −6 mol m −2 s −1 Pa −1 has been reported. 31,37 A summary of the literature can be referred to from the studies of Pera-Titus et al 37 and Ghasemzadeh et al 31 Therefore, further studies are needed to reach a unifying conclusion. Also, the underlying principles in the connection of glass composition, operative conditions, and hydrogen permeation are only partially explored.…”

Performance Comparison of Polymeric and Silica-Based Multi-Bed Pervaporation Membrane Reactors during Ethyl Levulinate Production

“…Water removal from the reaction zone can increase EtLA production, which was normally evaporated in traditional reactors. The membrane separation process has been used in many chemical production processes [ 10 , 11 , 12 , 13 , 14 , 15 ]. Water selective membranes can efficiently separate water from the reaction mixture and improve performance.…”