TiO2-Modified Pd/SiO2 for Catalytic Hydrodeoxygenation of Guaiacol

Mohong Lu, Jie Zhu, Mingshi Li, Yuhua Shan, Mingyang He, Chunshan Song

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22 Scopus citations

Abstract

TiO2-modified Pd/SiO2 catalysts (TixPd/SiO2) have been prepared using wet impregnation and characterized with N2 adsorption, X-ray diffraction, transmission electron microscopy, and temperature-programmed reduction. Their catalytic performance was examined for hydrodeoxygenation (HDO) of guaiacol as a model component of bio-oil. A smaller Pd particle size was obtained by the addition of TiO2, which may contribute to the high conversion of guaiacol on TixPd/SiO2. A strong interaction between TiO2 and Pd occurred when the catalysts were reduced with H2 at 500 °C. TiOx covered on Pd particles can coordinate the oxygen atom in hydrogenation intermediates and activate the C-O bond that could contribute to the significantly enhanced deoxygenation activity. The results suggest that the catalytic HDO proceeds through hydrogenation of the benzene ring of guaiacol on Pd sites to form 2-methoxycyclohexanol, followed by deoxygenation on the sites at a reduced TiOx-Pd interface to generate cyclohexane.

Original languageEnglish (US)
Pages (from-to)6671-6676
Number of pages6
JournalEnergy and Fuels
Volume30
Issue number8
DOIs
StatePublished - Aug 18 2016

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

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