Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김병현 | - |
dc.date.accessioned | 2024-05-16T01:17:54Z | - |
dc.date.available | 2024-05-16T01:17:54Z | - |
dc.date.issued | 2023-03-05 | - |
dc.identifier.citation | SEPARATION AND PURIFICATION TECHNOLOGY, v. 314, Article NO 123531 | en_US |
dc.identifier.issn | 1383-5866 | en_US |
dc.identifier.uri | https://information.hanyang.ac.kr/#/eds/detail?an=S1383586623004392&dbId=edselp | en_US |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/190313 | - |
dc.description.abstract | Linear α-olefins (LAOs) are conventionally purified from paraffins via energy-intensive superfractionation. Adsorptive separation with zeolite-based adsorbents is a promising alternative to distillation for olefin/paraffin purification. However, very few zeolites with different Si/Al ratios and metal ion types have been tested to separate LAOs in the liquid phase. In this study, we investigated the ability of various alkali metal ion-exchanged faujasites with different Si/Al ratios to separate 1-octene/n-octane mixtures. We prepared low-silica X (LSX), X, and Y zeolites loaded with Li+, Na+, K+, and Rb+ via ion exchange in an aqueous solution. The 1-octene adsorption capacities and selectivities were analyzed via liquid-phase batch adsorption experiments. Among LSX, X, and Y exchanged with the Na+ and Li+, LSX which had the lowest Si/Al ratios exhibited the highest selectivity. The 1-octene selectivities for LSX were in the following order: Rb+ ≈ K+ < Na+ < Li+. LiLSX demonstrated the greatest separation efficiency among the zeolites owing to the presence of the largest number of cation sites and the highest charge density of Li+. The affinity constants calculated from the Langmuir-type adsorption isotherms and enthalpies of adsorption suggest that cation–π interactions between the C = C bond in olefins and metal ions influence selective adsorption. Density functional theory calculations support this theory of intermolecular interactions. Furthermore, a series of adsorption and desorption breakthrough experiments using a column packed with LiLSX validated its applicability for separating 1-octene and n-octane. We believe these adsorbents can be modified further and widely applied in the purification of higher olefins from chemical and biochemical products. | en_US |
dc.description.sponsorship | This study was supported by the Technology Innovation Program (No. 20012971) funded by the Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea. | en_US |
dc.language | en_US | en_US |
dc.publisher | ELSEVIER | en_US |
dc.relation.ispartofseries | v. 314, Article NO 123531;1-13 | - |
dc.subject | Alkali metal ions | en_US |
dc.subject | Low-silica zeolites | en_US |
dc.subject | Ion exchange | en_US |
dc.subject | Linear alpha-olefin | en_US |
dc.subject | Adsorptive separation | en_US |
dc.title | Crucial role of alkali metal ions and Si/Al ratio in selective adsorption of 1-octene using faujasite zeolites | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1016/j.seppur.2023.123531 | en_US |
dc.relation.journal | SEPARATION AND PURIFICATION TECHNOLOGY | - |
dc.contributor.googleauthor | Park, Hui Seon | - |
dc.contributor.googleauthor | Cho, Dong-Woo | - |
dc.contributor.googleauthor | Kim, Kwangsoo | - |
dc.contributor.googleauthor | Kim, Byung-Hyun | - |
dc.contributor.googleauthor | Park, Jongkee | - |
dc.contributor.googleauthor | Yoo, Chung-Yul | - |
dc.contributor.googleauthor | Jung, Taesung | - |
dc.relation.code | 2023036507 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E] | - |
dc.sector.department | DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING | - |
dc.identifier.pid | bhkim00 | - |
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