Abstract
Designing hollow fiber (HF) membrane modules occupies one of the key positions in the development of efficient membrane processes for various purposes. In developing HF membrane modules, it is very important to have a uniform HF distribution and flow mixing in the shell side to significantly improve mass transfer and efficiency. This work suggests the application of different textile 3D HF structures (braided hoses and woven tape fabrics). The 3D structures consist of melt-spun, dense HFs based on poly(4-methyl-1-pentene) (PMP). Since the textile processing of HFs can damage the wall of the fiber or close the fiber bore, the membrane properties of the obtained structures are tested with a CO2/CH4 mixture in the temperature range of 0 to 40 °C. It is shown that HFs within the textile structure keep the same transport and separation characteristics compared to initial HFs. The mechanical properties of the PMP-based HFs allow their use in typical textile processes for the production of various membrane structures, even at a larger scale. PMP-based membranes can find application in separation processes, where other polymeric membranes are not stable. For example, they can be used for the separation of hydrocarbons or gas mixtures with volatile organic compounds.
Highlights
The development and practical application of membrane processes have stimulated active research on membrane materials and methods for forming membranes and designing membrane modules
The 3D structures consist of meltspun, dense hollow fiber (HF) based on poly(4-methyl-1-pentene) (PMP)
Since the textile processing of HFs can damage the wall of the fiber or close the fiber bore, the membrane properties of the obtained structures are tested with a CO2/CH4 mixture in the temperature range of 0 to 40 ◦C
Summary
The development and practical application of membrane processes have stimulated active research on membrane materials and methods for forming membranes and designing membrane modules. Over the past several years, the interest in hollow fiber (HF) membrane modules has constantly increased. Their main advantages include the following: they have high packing densities and specific productivity, and wide areas of application both in gaseous and liquid media [1]. Non-friendly phase inversion methods are mainly used for the production of polymer HFs [4,7,8] and flat-sheet membranes [9,10]. Production processes for HFs using environmentally friendly methods are being developed. The latest achievements in the production of polymeric HF membranes from an environmental and health point of view include the melt/solution integrated homogeneous reinforcement method, the melt spinning–stretching interfacial phase separation method or the utilization of “green” solvents [11]
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