Development of hollow fiber membrane systems for nitrogen generation from combustion exhaust gas

Hollow fiber modules with ceramic-supported PDMS composite membranes for pervaporation recovery of bio-butanol

“…Excellent results were also found in other works that pervaporation composite membranes were fabricated using inorganic substrates [13][14][15]. Meanwhile, hollow fiber substrates have been received increasing attention in development of high-permeable membranes, because of their low transport resistance, high-packing density and self-support structure [16][17][18]. Zhang et al proposed several hollow fiber composite membranes prepared by self-assembly method [19][20][21].…”

“…For pushing them into http the industrial stage, more intensive efforts are needed to study the design and application of hollow fiber modules for pervaporation process. As for hollow fiber modules applied in water treatment and gas separation, massive theoretically and experimental attempts have been made to design the membrane modules [17,[26][27][28][29][30][31][32]. Flow geometry was optimized to minimize the concentration polarization and enhance the mass transfer efficiency of the hollow fiber modules.…”

Synthesis and Gas Permeation Properties of Spirobischromane‐Based Polymers of Intrinsic Microporosity

“…Target applications include hydrogen recovery, nitrogen generation, and carbon dioxide capture. [1][2][3][4][5] To date, the basic gas permeability data of a vast number of polymers has been measured and the interpretation of the data from such studies suggests a trade-off relationship between the desirable properties of Polymers of intrinsic microporosity (PIMs) possess molecular structures composed of fused rings with linear units linked together by a site of contortion so that the macromolecular structure is both rigid and highly non-linear. For PIM-1, which has previously demonstrated encouraging gas permeability data, the site of contortion is provided by the monomer 5,5 0 ,6,6 0 -tetrahydroxy-3,3,3 0 ,3 0 -tetramethyl-1,1 0 -spirobisindane.…”

“…Thickness 80 to 100 mm. P is permeability coefficient; units: 1 Barrer ¼ 10 À10 Á cm3 [STP] cm Á cm À2 Á s À1 cmHg À1 ¼ 3.35 Â 10 À16 mol Á m Á m À2 Á s À1 Á Pa À1 .…”

Chapter 5. Design of Membrane Modules for Gas Separations

“…In order to evaluate if the fibers in a membrane module are blocked or have any defects Feng and Ivory 26 proposed the following procedure. The shell side of the module should be connected to a pure gas supply at a constant pressure where one end of the lumen side is closed (Figure 5.18).…”