Separations of F-gases from nitrogen through thin carbon membranes
- Authors
- Kim, Seong-Joong; Park, You-In; Nam, Seung-Eun; Park, Hosik; Lee, Pyung Soo
- Issue Date
- Jan-2016
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- CMS membrane; F-gas; NF3; SF6; CF4; Thin film; Supported membrane
- Citation
- SEPARATION AND PURIFICATION TECHNOLOGY, v.158, pp 108 - 114
- Pages
- 7
- Journal Title
- SEPARATION AND PURIFICATION TECHNOLOGY
- Volume
- 158
- Start Page
- 108
- End Page
- 114
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/58427
- DOI
- 10.1016/j.seppur.2015.12.014
- ISSN
- 1383-5866
1873-3794
- Abstract
- F-gases, such as NF3, CF4, and SF6, are strong greenhouse gases, and their emissions to the atmosphere should be prevented. We investigated F-gas separations by carbon molecular sieve (CMS) as a strong candidate for reduction of greenhouse gas. The viscosity of the precursor solution (Matrimid5218 (R)) was controlled from 10 cP to 40 cP for fabricating defect-free thin polymer films on porous supports, and thermal pyrolysis protocols were subsequently optimized in order to produce high-performance membranes. CMS membranes pyrolyzed at 650 degrees C in high-purity He (99.9999%) exhibited the best performance for N-2/NF3 separation (650 N-2 GPU, N-2/NF3 = 26.6). As compared with polymeric membranes, the CMS membranes performed far outperformed especially because of their high N-2 permeance, which originated from the thickness of the thin film along with the rationally controlled micropores. Therefore, these high-flux CMS membranes are expected to provide high productivity when implemented in large-scale processes for F-gas separation and recovery. (C) 2015 Elsevier B.V. All rights reserved.
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