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Issue 2, 2014
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Understanding the role of TiO2 crystal structure on the enhanced activity and stability of Ru/TiO2 catalysts for the conversion of lignin-derived oxygenates

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Abstract

Although Ru catalysts supported on reducible oxides such as TiO2 hold significant promise for the deoxygenation of biomass derived oxygenates, a significant drawback is their instability under oxidation conditions necessary for catalyst regeneration. In this contribution, the role of TiO2 crystal structure on resistance to metal particle sintering during calcination treatments at 400 and 500 °C is investigated. The resulting impact of the calcination temperature and TiO2 support phase for the conversion of guaiacol at 400 °C under atmospheric pressure of hydrogen over supported Ru catalysts is presented. Results suggest that the rutile TiO2 phase plays an important role in stabilizing Ru particles during calcination pretreatment in comparison with anatase supported Ru catalysts. Furthermore, rates normalized to the area of the support and the Ru suggest that the high activity of Ru/TiO2 systems for guaiacol conversion is attributed to defect sites created by hydrogen spillover from the Ru metal to the reducible TiO2 as opposed to only the sites located at the Ru/TiO2 interface.

Graphical abstract: Understanding the role of TiO2 crystal structure on the enhanced activity and stability of Ru/TiO2 catalysts for the conversion of lignin-derived oxygenates

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Publication details

The article was received on 11 Jul 2013, accepted on 21 Oct 2013 and first published on 22 Oct 2013


Article type: Paper
DOI: 10.1039/C3GC41377B
Green Chem., 2014,16, 645-652

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    Understanding the role of TiO2 crystal structure on the enhanced activity and stability of Ru/TiO2 catalysts for the conversion of lignin-derived oxygenates

    T. Omotoso, S. Boonyasuwat and S. P. Crossley, Green Chem., 2014, 16, 645
    DOI: 10.1039/C3GC41377B

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