화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.27, No.3, 807-811, March, 2010
DOI10.1007/s11814-010-0127-5  Export Citation
Production of middle distillate through hydrocracking of paraffin wax over Pd(0.15)Cs(x)H(2.7-x)PW(12)O(40) catalysts: Effect of cesium content and surface acidity
Joongwon Lee, Sunhwan Hwang, Dong Ryul Park, Jeong Gil Seo, Min Hye Youn, Ji Chul Jung, Sang-Bong Lee1, Jin Suk Chung2, and In Kyu Song†
  • School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Shinlim-dong, Gwanak-gu, Seoul 151-744, Korea
  • 1Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
  • 2School of Chemical Engineering and Bioengineering, University of Ulsan, Ulsan 680-749, Korea
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Palladium-exchanged heteropolyacid (Pd(0.15)Cs(x)H(2.7-x)PW(12)O(40)) catalysts were prepared by an ion-exchange method with a variation of cesium content (x=2.0, 2.2, 2.5, and 2.7) for use in the production of middle distillate through hydrocracking of paraffin wax. Surface acidity of Pd(0.15)Cs(x)H(2.7-x)PW(12)O(40) catalysts determined by NH3-TPD experiments showed a volcano-shaped trend with respect to cesium content. Surface acidity of the catalysts played an important role in determining the catalytic performance in the hydrocracking of paraffin wax. Conversion of paraffin wax increased with increasing surface acidity of the catalyst, while yield for middle distillate showed a volcano-shaped curve with respect to surface acidity of the catalyst. Among the catalysts tested, Pd(0.15)Cs(2.7)PW(12)O(40) catalyst with moderate surface acidity showed the best catalytic performance.
Keywords:Hydrocracking;Middle Distillate;Paraffin Wax;Heteropolyacid;Surface Acidity
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