Gas-separation performance

Gas separation performances (H2/n-butane, n-hexane/2-2 dimethylbutane) have been measured using a sweep gas (countercurrent mode) in order to increase the permeation driving force (no differential pressure was used) permeate and retentate compositions (see Figure 2) were analysed using on line gas chromatography. 

Ismail, A. F., Ng, B. C., and Abdul Rahman, W. A. W. (2003), Effects of shear rate and forced convection residence time on asymmetric polysulfone membranes structure and gas separation performance, Sep. Purif. Technol, 33,255-272. 

Hayashi, T. et al.. Gas separation performance of hollow-filament type polyimide membrane module for a compact tritium removal system, Fus. Technol, 28, 1503, 1995. 

S. Kitao and M. Asaeda, Gas separation performance of thin porous silica membranes prepared by sol-gel and CVD methods, in A.J. Burggraaf, J. Charpin and L. Cot (Eds.), Proceedings of the Second International Conference on Inorganic Membranes, 1-4 July 1991, Montpellier. Transtech Publ., Zurich, 1991, pp. 267-27 >. 

F. Hamad, G. Chowdhury, and T. Matsuura. Effect of metal cations on the gas separation performance of sulfonated poly (phenylene oxide) membranes. Desalination, 145(l-3) 365-370, September 2002. 

Fluorinated aromatic PAI can be used for highly selective membranes. Some are summarized in Table 14.5. These compounds are condensed with various amines to give PAI t)q)es. These include the monomers are shown in Figure 14.5 and in Figure 14.2. The gas separation performance can be tailored by variations in the polymer structure. 

Ramsay and Kallus [11], as well as other anthors [12,13], pointed out that the distribution of the zeolite within the snp-port, that is, the zeolite preferentially deposited inside the porous structure of the support or the zeolitic material constituting a thin layer on top of the porous support, apart from influencing the mechanical strength and defect likelihood of the resulting membrane, may also cause differences in its gas separation performance. 

Huang A, Wang N, Caro J. Synthesis of multi-layer zeohte LTA membranes with enhanced gas separation performance by using 3-aminopropyltriethoxysilane as interlayer. Micropor Mesopor Mater, 2012 164 294-301. 

D. E. Fain and G. E. Roettger, Effects of Leaks on Gas Separation Performance of A Nano Pore Size Membranes, K/TSO-24, Lockheed Martin Energy Systems, Inc. Oak Ridge, K-25 Site, Oak Ridge, Tennessee, October 1996. 

Ionic liquids supported on porous polymer membranes can enhance the gas separation performance as this design improves both permeability and selectivity for a series of industrially relevant gas mixtures [27]. 

Sen, D., Kalipcilar, H. and Yibnaz, L. 2006. Gas separation performance of polycarbonate membranes modified with multifunctional low molecnlar-weight additives. Sep. Purif. Technol. 41 1813-1828. 

Plasticization behaviour induced by condensable gases and vapours (e.g. carbon dioxide, hydrocarbons and other organic vapours) in polymer membranes is stiQ a painful problem in polymeric membrane-based gas separation applications [27,28]. Recently, novel hyperbranched polyimides were prepared from telechelic polyimides and an attempt was made to improve its gas separation performance and physical stability by obtaining plasticization-resistant materials [29-33] (see e.g. Chapters 4, 6 and 7 of this book). 

The Effects of Minor Components on the Gas Separation Performance of Polymeric Membranes for Carbon... 

Table 2 Reported data related to the gas-separation performance of nanohybrid membranes... 

Robeson in 2008, indicating excellent improvement in gas separation performance. 

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