Hydrogenolysis of Glycerol to Propanediols over Nano-Ru/C Catalyst with Ionic Liquid Addition

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Supported ruthenium catalyst on nano-activated carbon (2%Ru/C) and titania (2%Ru/TiO2) were prepared by wet impregnation technique with and without ionic liquid addition (choline chloride with different Lewis acid). Mole ratio of choline chloride and Lewis acid were fixed at 1:3. Catalysts evaluation was performed by glycerol hydrogenolysis reaction at 100°C with initial hydrogen pressure 20 bars for 7 hours reaction. The results showed that supported ruthenium on activated carbon acetylene black with addition of choline chloride/zinc (II) chloride catalyst indicated 30.7% of glycerol converted to 20.6% propylene glycol and 11.4% ethylene glycol. Catalysts profile of XRD showed graphitic phase which could reduce catalyst poisoning effect. XPS analysis showed that Ru/CC-ZnCl2/C catalyst spesies was in Ru4+ state before reaction. In the meantime, mapping analysis using FE-SEM showed well dispersion of ruthenium metal on nano-activated carbon acetylene black with addition of choline chloride/zinc (II) chloride gave the highest selectivity to propanediol. Furthermore, smaller size of nano activated carbon (30-60 nm) than titania (90-120nm) analyzed by TEM may the main course in increasing the conversion of glycerol.

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Periodical:

Edited by:

Zainal Arifin Ahmad, Muhd Ambar Yarmo, Fauziah Haji Abdul Aziz, Dr. Meor Yusoff Meor Sulaiman, Badrol Ahmad, Khairul Nizar Ismail, Nik Akmar Rejab

Pages:

49-54

DOI:

10.4028/www.scientific.net/AMR.173.49

Citation:

A. Alias et al., "Hydrogenolysis of Glycerol to Propanediols over Nano-Ru/C Catalyst with Ionic Liquid Addition", Advanced Materials Research, Vol. 173, pp. 49-54, 2011

Online since:

December 2010

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$35.00

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