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Thermally rearranged poly(benzoxazole-co-imide) hollow fiber membranes for CO2 capture

Title
Thermally rearranged poly(benzoxazole-co-imide) hollow fiber membranes for CO2 capture
Author
이영무
Keywords
TR-PBOI hollow fiber membranes; Polyethylene glycol; Co-solvent system; Skin layer morphology; Ternary mixed-gas measurement
Issue Date
2016-01
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v. 498, Page. 125-134
Abstract
Thermally rearranged poly(benzoxazole-co-imide) (TR-PBOI) hollow fiber membranes were fabricated from a hydroxyl polyimide-co-polyimide (HD5) precursor containing equal molar amounts of non-TRable DAM and TR-able HAB. A wide variety of spinning conditions were optimized in order to improve the gas permeation properties. A high bore flow rate (DI water) led to lowered gas permeation properties due to the generation of a dense, thick skin layer. The shear rate contributed significantly to manipulate the polymer chain packing density during spinning, therefore, CO2 permeance was critically enhanced in low shear rate. The addition of co-solvent (propionic acid) and pore forming agent (PEG 200) was shown to improve the gas permeation properties. The TR-PBOI hollow fiber membrane fabricated under optimal spinning conditions exhibited an excellent CO2 permeance of 560 GPU and CO2/N-2 ideal selectivity of 16.8. A TR-PBOI hollow fiber module was successfully fabricated with an effective area of 106 cm2 for the mixed-gas permeation tests with a ternary gas mixture containing 14% CO2, 6% O-2 of 400 GPU at a pressure ratio of 10. (C) 2015 Elsevier By. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0376738815302441?via%3Dihubhttp://hdl.handle.net/20.500.11754/30511
ISSN
0376-7388; 1873-3123
DOI
10.1016/j.memsci.2015.10.015
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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