Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 136, Issue -, Pages 286-295Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2014.09.016
Keywords
Greenhouse gas separations; Mixed matrix membranes; 3-D disordered mesoporous silica
Categories
Funding
- KIST [2E23952]
- Global Excellent Technology Innovation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) under the Ministry of Trade, Industry 82 Energy [20135010100750]
- Energy Efficiency and Resources R&D Program under the Ministry of Knowledge Economy, Republic of Korea [2012T100100528]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20135010100750] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [2E24652, 2E23952] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [21A20131812182] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The effect of 3-dimensionally disordered mesoporous silica (DMS) was investigated on the transport of two different glassy polymer matrices, 6FDA-DAM:DABA (3:2) and polysulfone (PSf). More specifically, single gas (i.e. N-2, CO2, CH4 and NF3) permeabilities of the mixed matrix membranes (MMMs) were characterized as a function of DMS volume fractions. Our permeation results demonstrated that both 6FDA-DAM:DABA (3:2)- and PSf-based MMMs with a nominal DMS weight fraction of 0.2 substantially improved all the single gas permeabilities mainly due to the diffusivity improvement. Such a significant increase in diffusivity is attributed to the 3-dimensionally interconnected pore structures of DMS particles. NF3, a missing greenhouse gas, exhibited the permeability improvement mechanism different from other gases. Besides, at the relatively lower DMS loading, difference in the extent of increase in permeability was observed for two different polymer cases. It was explained presumably by the effect of a high resistance zone-of-influence, or the rigidification of matrix polymer chains around inorganic particles. Our study suggests that 3-dimensional DMS particle-containing MMMs can provide a useful material platform for separating N-2/NF3, CO2/CH4, and CO2/N-2, by substantially increasing permeability, thereby cutting down the capital cost of membrane units. (C) 2014 Elsevier B.V. All rights reserved.
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