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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis


Effects of metal cation on the skeletal isomerization of 1-butene over clinoptilolite

DC Field Value Language Lee, Hyun Chul ko WOO, Hee Chul ko Chung, Soo Hyun ko Kim, Hae Jin ko Lee, Kyung Hee ko Lee, Jae Sung ko 2015-07-27T05:04:36Z - 2015-07-27 ko 2002-10 -
dc.identifier.citation JOURNAL OF CATALYSIS, v.211, no.1, pp.216 - 225 ko
dc.identifier.issn 0021-9517 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract Skeletal isomerization of I-butene to isobutene has been investigated over various metal-cation-exchanged natural clinoptilolite zeolites. The effects of metal cation exchange were examined by XRD, NH3-TPD, FT-IR, and solid-state NMR to elucidate the controlling factors affecting the selectivity to isobutene. Cobalt-cation-exchanged natural clinoptilolite zeolite (Co-HNZ) showed a higher selectivity to isobutene compared with that of HNZ at the same conversion of n-butenes under the same reaction conditions, while barium-cation-exchanged zeolite (Ba-HNZ) exhibited a higher activity but a very low selectivity to isobutene. It could be suggested that the high selectivity over the Co-HNZ catalyst was induced by selective removal of strong acid sites that were responsible for the side reactions of dimerization cracking as well as by imposing an effective constraint on zeolite channels. On the other hand, the high density and easy accessibility of acid sites mainly on the external surface in Ba-HNZ could increase the extent of the bilmolecular reaction pathway, leading to high yields of by-products. Thus, a selective catalyst for skeletal isomerization of 1-butene should satisfy multiple requirements regarding its acid site, namely, strength, type, concentration, and accessibility. (C) 2002 Elsevier Science (USA) ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.subject clinoptilolite ko
dc.subject skeletal isomerization ko
dc.subject acidity ko
dc.subject selectivity ko
dc.subject cobalt ko
dc.subject FT-IR ko
dc.subject NMR ko
dc.title Effects of metal cation on the skeletal isomerization of 1-butene over clinoptilolite ko
dc.title.alternative Effects of metal cation on the skeletal isomerization of 1-butene over clinoptilolite ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-0036422209 ko
dc.identifier.wosid 000178377800023 ko
dc.type.rims ART ko
dc.description.wostc 5 *
dc.description.scopustc 9 * 2015-12-28 * 2015-11-04 *
dc.identifier.doi 10.1006/jcat.2002.3732 ko
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