Permeability plots

Fig. 9. Experimental integral permeability plots for Dyes I—III through Nylon 6 membranes according to Eq. (14)84) (with CDS1 varying between zero and a small finite value to the extent indicated by the horizontal bars) O Dye I A Dye II Dye III...

John Wiley Sons, Inc. (B) Permeability predicted from assumption that 0 is constant. From Paul Koros (1976) Courtesy of John Wiley Sons, Inc. (C) Permeability plotted in accordance with the partial immobilisation model with D constant. From Koros et al. (1976) Courtesy of John Wiley Sons, Inc. 

Fig. 3, Porosity-permeability plot of cataclastic fault rocks developed from sandstones with low (<6%) clay contents. Note the values extend over six orders of magnitude.

Fig. 3.13b. Impact of diagenetic mineral cement transformation on reservoir quality, Saharan Basins. A Diagram illustrating the impact of the illitization on reservoir quality. B Porosity and C permeability plots against illite content in clay cement in reservoir rocks from Hassi Messaoud ( ) and Hassi R Mel (o) fields. Reservoir rocks involved in the correlations were selected a manner, that their other petrographic features are similar or very near, e.g. average grain size M.D. = 0.2-0.4 mm, clay cement content = 10-15% (of total mass of the rock), with very little or no carbonate cement...

Figure 7. Sugar permeability plot for bilayer lipid membrane (egg lecithin-cholesterol in n-decane) at 25 °C. The slope of the plot before and after addition of extract is equal to the permeability coefficient. Passive diffusion of D-[ C]glucose (O) and facilitated diffusion ( ) on addition of band 4.5 (sugar transporter) at a concentration of 0.99 (Jig cm to the trans side of the bilayer. (Reproduced with permission from Ref. 44. Copyright 1982 Elsevier Science.)...

The manufacture of DPMs based on infiltrated molten carbonates in the porosity of perovskite membranes constitutes the most recent and innovative application of perovskites for CO2 capture. Since the first studies reported by Wade and coworkers [33] and Lin and coworkers [34], many efforts have been made to develop stable high-flux membranes for CO2 separation. Table 39.5 collects the most remarkable results, whereas Figvue 39.12 plots the permeance versus permeability plots for dual-phase perovskite-carbonate materials compared with low-temperature CO2 separating membranes (zeolites and MOFs/ZIFs). 

It was the realization that there were performance limits in polymeric membranes in gas separation which prompted research on carbon membrane In 1991 Robeson set upper bounds in the selectivity-permeability plots of several gas-pairs by compiling experimental data for a large nttmber of polymeric materials. Although the boundary lines have been shifted to the desirable direction after nearly 20 years research efforts, the achievement has not yet been traly spectacular. Attention of membrane research commimity was then focussed on inorganic materials, snch as silica, zeolite and carbon, which exhibited molecitlar sieving properties. Remarkable improvements have been made in terms of the selectivity-permeability plot but the exploitation of these materials for the practical apphcation remains imder-achieved primarily due to their poor processibility. 

Figure 1. Selectivity-permeability-plots of poly(ether ketone)s 9 (upper-bound lines and some literature data added for orientation)...

Figure 2.16 shows a second example for a porosity-permeability plot. From the porosity-permeabihty plot on the right the regression equations can be derived ... 

FIGURE 2.24 Schematic porosity-permeability plots for clastic and carbonate rocks. Based on figures from Nelson (1994, 2005) and Lucia (1999, 2007). 

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