471968 Guaiacol Deoxygenation Using Methane over Pt-Bi Catalysts: Reaction Pathways and Kinetics

Monday, November 14, 2016: 1:00 PM
Franciscan B (Hilton San Francisco Union Square)
Yang Xiao and Arvind Varma, School of Chemical Engineering, Purdue University, West Lafayette, IN

The deoxygenation of guaiacol, a typical molecule from the pyrolysis of ligno-cellulosic biomass, was investigated using methane as the reductant to overcome the high cost issue of H2 as the reductant for the hydrodeoxygenation (HDO) process. In our prior work, a Pt-Bi/C catalyst was used to deoxygenate guaiacol and methane was found to exhibit as good deoxygenation performance as H2. In the present work, by varying the space velocity, kinetic data was acquired. Following similar reaction pathways as in the case using H2, rate constants and activation energies for each sub-reaction in the network were obtained. Owing to more difficult activation of C-H bond in CH4, as compared to H-H bond in H2, the kinetic results show higher reaction barriers when methane is used as the reductant. This work provides a new approach for bio-oil upgrading using methane as the reductant instead of hydrogen.

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