화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.13, No.7, 1062-1066, December, 2007
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Selective Positional Isomerization of 2-Butene over Alumina and La-promoted Alumina Catalysts
Kyungah Lee, Jong-Ki Jeon†, Eui-Hwan Hwang, Young Soo Ko, Young-Kwon Park1, Seong Jun Lee2, and Jae Ho Lee2
  • Department of Chemical Engineering, Kongju National University, Gongju 314-701, Korea
  • 1Faculty of Environmental Engineering, University of Seoul, Seoul 130-743, Korea
  • 2Chemicals R&D Center, SK Energy, Yuseong-gu, Daejeon 305-712, Korea
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Positional isomerization of 2-butene to 1-butene over alumina catalysts was investigated. The physical characteristics and acidity of activated alumina and η-alumina catalysts were analyzed by BET, XRD, ammonia-temperature programmed desorption, and infra-red spectroscopy of adsorbed pyridine. The effects of lanthanum addition on the acidity of catalysts and the isomerization were investigated. The yield of 1-butene over η-alumina catalyst was shown to be higher than that of activated alumina catalyst due to the larger BET surface area (287 m2/g) as well as the weak acidity of η-alumina. The catalytic activity does not correspond to the amount of Lewis acid sites, explaining the insignificant role of Lewis acid sites in the positional isomerization of 2-butene. It was proposed that the H site might be an active site for the positional isomerization of 2-butene to 1-butene.
Keywords:2-butene;positional isomerization;alumina catalyst;1-butene
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