Development of inorganic–organic hybrid membranes for carbon dioxide/methane separation

Plasticization and Swelling in Polymeric Membranes in CO2 Removal from Natural Gas

“…3 [82]. It is clearly visible that there is a top layer of silica with small particles forming the intermediate layer at the bottom.…”

“…They reported that these membranes exhibit reasonable selectivity, permeability, and heat resistivity within the pressure range of 10-50 psi. Suzuki et al [82] prepared inorganicorganic hybrid membranes by chemical vapor deposition. These membranes offered a CO 2 /CH 4 selectivity above 40 at 393 K. Silica membranes prepared by the sol-gel method provided a high permeance to specific gases.…”

Role of Amine Type in CO2 Separation Performance within Amine Functionalized Silica/Organosilica Membranes: A Review

“…2018, 8, 1032 14 of 22 In Equations (5)- (7), P0, D0, and S0 are the pre-exponential factors, Ep and Ed are the apparent activation energies for permeation and diffusion, respectively, ΔHs is the effective sorption enthalpy, R is the universal gas constant, and T is the operation temperature. A relationship among Ep, Ed and ΔHs can then be obtained after the combination of Equations (5)- (7) when Pl = DS, as shown in Equation (8).…”

“…The selectivity is always less arresting due to the comparable kinetic diameters of CO 2 (3.3 Å) and N 2 (3.64 Å) and due as well to the difficulty in precisely controlling the pore (rigid or free-volume type) sizes. Given this, various amine-functionalized silica-based membranes have been developed to accomplish CO 2 separation from gas mixtures with potentially enhanced efficiency [6][7][8][9][10][11][12][13]. These membranes are expected to show great potential in simultaneously promoting CO 2 permeance and permselectivity due to the reversible reactions between CO 2 and amine groups.…”

Synthesis of nanoporous PVDF membranes by controllable crystallization for selective proton permeation

“…Typical materials include zeolites-, silica-based membranes, and metal organic frameworks (MOFs) [14][15][16][17], in which unique crystal configurations play critical roles in selectivity. Inspired by the success in regulating nanoscale pores in inorganic membranes, the crystal structure generated in polymer cast solutions could reasonably have potential for use in ion-selective permeation.…”