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Selective Hydrogenation of Nitrobenzene to Aniline over Ru/SBA-15 Catalysts

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Abstract

A series of Ru/SBA-15 catalysts (0.5–6.0 wt%) are prepared by impregnation method. The catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), CO-chemisorption, surface area and pore-size distribution measurements. The catalytic activities were evaluated for the vapor phase hydrogenation of nitrobenzene. The dispersion measured by CO-uptake values suggests decrease in dispersion with increasing Ru loading on SBA-15. These findings are well supported by the crystallite size measured from XRD and TEM measurements. XPS study reveals the formation of Ru0 after reduction at 573 K for 3 h. The catalysts exhibit high conversion/selectivity at 4.5 wt% Ru loading during hydrogenation reaction. The particle size measured from CO-chemisorption and TEM analysis related to the TOF during the hydrogenation reaction. Ru/SBA-15 catalysts are found to show higher conversion/selectivities during hydrogenation of nitrobenzene than Ru/SiO2 and Ru/Al2O3 catalysts.

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Acknowledgements

The authors thank Director, IICT, Hyderabad for his encouragement. Ch. S. S thanks CSIR, New Delhi for the award of Senior Research Fellowship.

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Authors and Affiliations

  1. Catalysis Division, Indian Institute of Chemical Technology, Hyderabad, India

    Komandur V. R. Chary & Chakravartula S. Srikanth

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  1. Komandur V. R. Chary
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  2. Chakravartula S. Srikanth
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Correspondence to Komandur V. R. Chary.

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Chary, K.V.R., Srikanth, C.S. Selective Hydrogenation of Nitrobenzene to Aniline over Ru/SBA-15 Catalysts. Catal Lett 128, 164–170 (2009). https://doi.org/10.1007/s10562-008-9720-1

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  • DOI: https://doi.org/10.1007/s10562-008-9720-1

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