Tao He's Composite hollow fiber membranes for ion separation and remo PDF

By Tao He

ISBN-10: 9036516242

ISBN-13: 9789036516242

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54 (1994) 385-404. [13] I. M. Wienk, H. A. Teunis, T. v. d. Boomgaard, and C. A. Smolders, A new spinning technique for hollow fiber ultrafiltration membranes, J. , 78 (1993) 93-100. [14] K. Kimmerle and H. Strathmann, Analysis of the structure-determining process of phase inversion membranes, Desalination, 79 (1990) 283-302. [15] I. F. Wang, USP 5869174, 1999. [16] W. J. Wrasidlo, USP 4629563, 1986. [17] A. J. Reuvers, J. W. A. van den Berg, and C. A. Smolders, Formation of membranes by means of immersion precipitation.

2 SEM photos of polysulfone hollow fiber. (A) Cross-section of the fiber; (B) Outside surface of the fiber; (C) Middle part of the fiber wall; (D) Inner side surface of the fiber. 2 Optimization of operational parameters Equation 2 is used to calculate the overall flux through the membranes which results is a combined contribution of the membrane resistance and the laminar boundary layer resistance. Membrane fluxes typically depend on the circulation rates of the solutions. A high shear rate of the fluids tends to reduce the thickness of the boundary layer adjacent to the membranes.

Bar-1). Compared to the Accurel PP Q3/2 membrane, the PSf membrane described in this paper has a comparable copper flux, but a much lower gas flux and smaller pore sizes. This is probably due to the fact that copper flux is a diffusion-controlled process, which depends not only on the skin layer but also on the morphology of the porous structure. e. the pore size and porosity of the skin, once the sub-structure is open enough as in our case. 3 Effect of inner structure An optimized copper flux is obtained for PSf hollow fiber membranes, which is comparable to that of a flat or hollow fiber Accurel PP membrane.

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Composite hollow fiber membranes for ion separation and remo by Tao He


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