Effect of Ta2O5 as a Support in Phosphotungstic Acid Catalysts for Vapor Phase Dehydration of Glycerol to Acrolein

Authors

  • Balaga Viswanadham Catalysis Division, Indian Institute of Chemical Technology, Hyderabad, India
  • Pedada Jhansi Catalysis Research Group, School of Chemistry & Physics, University of KwaZulu-Natal, Durban, South Africa
  • Komandur V R Chary Catalysis Division, Indian Institute of Chemical Technology, Hyderabad, India

Abstract

The Ta2O5 supported phosphotungstic acid (HPA) catalysts were investigated for vapor phase dehydration of glycerol to acrolein and materials were synthesized by impregnation method. The above HPA catalysts were characterized by Raman spectroscopy to identify the Keggin ion and temperature programmed desorption of ammonia to explore the acidity of the catalysts. The findings of Raman spectra shows that the Keggin ion of heteropolyacid intact with support. NH3-TPD results confirm that the acidity of the catalyst increases with incline in HPA loading. The Ta2O5 supported catalysts have shown remarkable catalytic performance compared to zirconia and titania supported catalysts during the dehydration of glycerol to acrolein reaction. 

 

Keywords: HPA, Ta2O5, glycerol, acrolein, acidity

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Published

2019-04-16

Issue

Vol. 2 No. 3 (2015)

Section

Articles

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