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Catalysis Letters

, Volume 131, Issue 3–4, pp 597–605 | Cite as

Preparation and Characterization of Ru/Al2O3/Cordierite Monolithic Catalysts for Selective Hydrogenation of Benzene to Cyclohexene

  • Yujun Zhao
  • Jin Zhou
  • Jianguo Zhang
  • Shudong Wang
Article

Abstract

A series of Ru/Al2O3/cordierite monolithic catalysts were prepared and characterized by BET, XRD, TPR, TEM and SEM-EDAX. The catalytic performances in selective hydrogenation of benzene to cyclohexene were investigated in a continuous fixed-bed reactor. The preparation conditions significantly influence morphology, particle size, and surface area of the catalyst, subsequently affecting the catalytic performances. It was found that higher calcination temperature of the Ru-based monolithic catalyst led to the conglomeration and crystallite growth of the t-RuO2, which will decrease the catalytic activity. The lower thickness and the larger pore size of the alumina washcoating layer are the preferential choices to obtain higher cyclohexene selectivity due to the improved internal mass transfer of cyclohexene. It was also found that high ruthenium loading resulted in deep hydrogenation of cyclohexene. Moreover, the reduction temperature was optimized to 473 K and excess high temperature led to the deterioration of both activity and cyclohexene selectivity.

Keywords

Ruthenium Benzene Cyclohexene Hydrogenation Cordierite monolith 

Notes

Acknowledgments

The authors thank Prof. Ma Xinbin, Prof. Wang shengping (Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University) and Dr. Gong Jinlong (Faculty of Arts and Sciences, Harvard University) for useful discussions and suggestions.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering & TechnologyTianjin UniversityTianjinChina
  2. 2.Modern Chemical Laboratory, Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina

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