Tuning microcavities in thermally rearranged polymer membranes for CO2 capture
- Title
- Tuning microcavities in thermally rearranged polymer membranes for CO2 capture
- Author
- 성종근
- Keywords
- Carbon Dioxide; chemistry; Hydrogen; Membranes; Artificial; Particle Size; Polymers; chemical synthesis; Porosity; Surface Properties; Temperature
- Issue Date
- 2012-04
- Publisher
- ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
- Citation
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 14, 13, 4365-4373
- Abstract
- Microporous materials have a great importance in catalysis, delivery, storage and separation in terms of their performance and efficiency. Most microporous materials are comprised of inorganic frameworks, while thermally rearranged (TR) polymers are a microporous organic polymer which is tuned to optimize the cavity sizes and distribution for difficult separation applications. The sub-nano sized microcavities are controlled by in situ thermal treatment conditions which have been investigated by positron annihilation lifetime spectroscopy (PALS). The size and relative number of cavities increased from room temperature to 230 °C resulting in improvements in both permeabilities and selectivities for H2/CO2 separation due to the significant increase of gas diffusion and decrease of CO2 solubility. The highest performance of the well-tuned TR-polymer membrane was 206 Barrer for H2 permeability and 6.2 of H2/CO2 selectivity, exceeding the polymeric upper bound for gas separation membranes.
- URI
- http://pubs.rsc.org/en/Content/ArticleLanding/2012/CP/c2cp23729f#!divAbstracthttp://hdl.handle.net/20.500.11754/42532
- ISSN
- 1463-9076
- DOI
- 10.1039/c2cp23729f
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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