Dual-layer hollow fibers for gas separation processes produced by quadruple spinning |
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| Authors: | R A Amaral N R J-D Mermier A C Habert C P Borges |
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| Affiliation: | 1. Chemical Engineering Program – COPPE, Federal University of Rio de Janeiro, UFRJ, Rio de Janeiro, RJ, Brazilramaral@peq.coppe.ufrj.br;3. Chemical Engineering Program – COPPE, Federal University of Rio de Janeiro, UFRJ, Rio de Janeiro, RJ, Brazil |
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| Abstract: | A novel quadruple spinneret to produce dual-layer hollow fiber membranes by simultaneous spinning of two polymer solutions, using the dual precipitation bath technique is proposed. Hollow fibers aimed at gas separation processes were prepared in extrusion system specifically designed and built for this purpose. A polyurethane polymer was selected as the selective layer (outer-layer), while polyethersulfone was defined as the support (inner-layer). Activated carbon powder was added into the PU solution for further improvement of the transport properties. The hollow fibers showed good adhesion between the polymer layers and a defect-free selective layer. Representative results include a CO2/N2 selectivity of 43. |
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| Keywords: | Dual-layer hollow fibers gas separation process quadruple spinneret activated carbon |
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