Modeling of Silica Membranes

Progress in Modeling of Silica-Based Membranes and Membrane Reactors for Hydrogen Production and Purification

“…Palladium membranes were mostly applied in MRs for high-grade hydrogen generation [22][23][24][25][26][27][28][29], but in recent years several scientists investigated other membrane materials to evaluate the effectiveness of non Pd-based membranes applied to MRs, with the main purpose of achieving more economical solutions than Pd-based membranes utilization [30,31]. Compared to other membranes, silica membranes and their applications in MRs for hydrogen generation received particular attention since they are cheaper, show higher permeability and result in more robust than Pd-based membranes [30,[32][33][34][35]. As illustrated in Figure 7, the interest towards silica MRs from both an experimental and modeling point of view is testified by an increasing number of scientific publications in this field.…”

“…It is generally accepted that the main benefit deriving from the modeling of such a process is due to cost saving, originated by the reduction of the experimental tests number. Concerning silica membranes and their applications in MRs, computational fluid dynamics (CFD), black box and molecular dynamic (MD) models were applied in various studies as addressed in literature [32][33][34], but most of them are based on 1-D model with a mass balance equation; in other cases, 2-D models were based on the utilization of CFD method. Table 4 reports some of the most representative modeling studies on silica MRs, highlighting the main details about them.…”

Synthesis of size-controlled boehmite sols: application in high-performance hydrogen-selective ceramic membranes

“…12 Among these, silica-based microporous membranes are a promising technology for high purity hydrogen production in membrane reactors because of their high thermal stability, chemical resistance, and moderate cost. 13,14…”

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

“…In Europe, the lubricity of the fuel is measured with the high frequency reciprocating rig (HFRR) test, in which the addition of 20% ethyl levulinate into No. 2 base fuel was able to improve the HFRR value from 410 to 275 [ 10 ]. Biodiesel composed of fatty acid methyl esters (FAME) does not have very good cold properties and suffers from gum formation [ 9 ].…”

“…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.…”