Separation Characteristics of Ternary Gas Mixtures in Serial Cells of Polysulfone Hollow Fibre Membranes
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Preparation and characterization of low temperature PTFE-Nafion composite membranes for hydrogen production
2015, International Journal of Hydrogen EnergyCitation Excerpt :The separation factor (α) is the ability of the membrane to filter out unwanted gases and allow the desired gas to pass through or vice versa, whereas the permeability (P) is the flow rate of a component in the gas mixture through the membrane or the flux of a specific gas through the membrane. Three additional important parameters are the permeation flux (J); the selectivity (β), which is equal to separation factor [14]; and the permeance (P/l), which is the ratio of the permeability to the effective thickness of the membrane [15,16]. The dominant gas transport mechanisms in the membranes depend on the size of the pores.
Hollow fiber membrane process for the pretreatment of methane hydrate from landfill gas
2014, Fuel Processing TechnologyCitation Excerpt :Then, the rapid evaporation of methanol left small amount of water in the pores before the fiber was dried. It may cause the fibers to quick shrinkage [27,28]. However, the selectivity of KM2 is lower than that of KM1 as shown in the Fig. 5(b).
Separation of sulfur hexafluoride (SF<inf>6</inf>) from ternary gas mixtures using commercial polysulfone (PSf) hollow fiber membranes
2014, Journal of Membrane ScienceCitation Excerpt :With increase in feed pressure from 1×105 Pa to 7×105 Pa by an increment of 2×105 Pa, the flow rate in the feed, permeate and retentate sides linearly increases at a rate of 7.9×10−4, 4.8×10−4 and 3.1×10−4 cm3/min/Pa/min/bar, respectively (see Fig. 6(a)). This observation suggests that the treatment and production capacity of the membrane can be increased with an increase in the feed pressure [22]. Fig. 6(b) shows the permeances and the selectivities of the ternary gas mixture as a function of feed pressure.
Separation performance of PEBAX/PEI hollow fiber composite membrane for SO<inf>2</inf>/CO<inf>2</inf>/N<inf>2</inf> mixed gas
2013, Chemical Engineering JournalCitation Excerpt :The stage cut significantly impacts the gas permeation properties. Consequently, insufficient time is available for the species to permeate within the membrane, and the separation thus becomes more selective [45]. A higher stage cut results in higher permeation by SO2 due to an increase in the driving force.
Fabrication of lab-scale hollow fiber membrane modules with high packing density
2004, Separation and Purification Technology