화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.17, No.2, 310-315, March, 2011
DOI10.1016/j.jiec.2011.02.029  Export Citation
Pd catalyst supported on SiO2-Al2O3 xerogel for hydrocracking of paraffin wax to middle distillate
Joongwon Lee, Sunhwan Hwang, Jeong Gil Seo, Ung Gi Hong, Ji Chul Jung1, and In Kyu Song†
  • School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Shinlim-dong, Kwanak-ku, Seoul 151-744, South Korea
  • 1Department of Chemical Engineering, Myongji University, Yongin 449-728, South Korea
E-mail:
SiO2-Al2O3 xerogel supports (SA-X) with different SiO2 contents (X, wt%) were prepared by a sol-gel method. Pd catalysts supported on SA-X (Pd/SA-X) were then prepared by an impregnation method for use in the production ofmiddle distillate (C10-C20) through hydrocracking of paraffin wax. Acidity of Pd/SA-X catalysts determined by NH3-TPD experiments showed a volcano-shaped trend with respect to SiO2 content. Acidity of the catalyst played an important role in determining the catalytic performance in the hydrocracking of paraffin wax. Conversion of paraffin wax increased with increasing acidity of the catalyst, while yield for middle distillate showed a volcano-shaped curve with respect to acidity of the catalyst. This indicates that optimal acidity of the catalyst was required for maximum production of middle distillate. Among the catalyst tested, Pd/SA-40 catalyst with moderate acidity showed the highest yield for middle distillate. It was also found that high Pd dispersion of Pd/SA-X catalyst led to the enhanced selectivity for middle distillate in the hydrocracking of paraffin wax.
Keywords:Hydrocracking;Middle distillate;Silica.alumina xerogel;Palladium catalyst
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