Shape Selective Catalysis of Cation-Exchanged Pentasil Zeolites

양이온 교환된 펜타실 제올라이트의 형상 선택적 촉매작용

  • Byoung Joon Ahn (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Byung Woo Hwang (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Hakze Chon (Department of Chemistry, Korea Advanced Institute of Science and Technology)
  • 안병준 (한국과학기술원 화학과) ;
  • 황병우 (한국과학기술원 화학과) ;
  • 전학제 (한국과학기술원 화학과)
  • Published : 1984.02.20

Abstract

The reaction of toluene with ethanol was studied over various cation-exchanged pentasil zeolite catalysts. The toluene disproportionation reaction to produce xylenes increased with increasing reaction temperature and the activity of alkylation of toluene with ethanol showed maximum at around $400^{\circ}C$. Only Cs-ZSM-5 catalyst showed pronounced p-ethyltoluene selectivity increasing to 96% with increasing degree of Cs-exchange. The sorption rate of m-xylene was lower for Cs-exchanged ZSM-5 than H-ZSM-5 catalyst. These phenomena were interpreted in terms of shape selectivity arising from the partial blocking of channel intersections by large cesium ions.

Keywords

References

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