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Bio-oil upgrading over platinum catalysts using in situ generated hydrogen

Paper ID Volume ID Publish Year Pages File Format Full-Text
43127 45956 2009 7 PDF Available
Title
Bio-oil upgrading over platinum catalysts using in situ generated hydrogen
Abstract

The liquid phase upgrading of a model bio-oil was studied over a series of supported Pt catalysts. Pt/Al2O3 showed the highest activity for deoxygenation, the oxygen content of the model oil decreasing from an initial value of 41.4 wt% to 2.8 wt% after upgrading. GC–MS analysis of the oil showed it to be highly aromatic, the major components corresponding to alkyl-substituted benzenes and cyclohexanes. CO2 was formed as the major gaseous product, together with lower yields of H2 and C1–C6 hydrocarbons. Based on the product distribution, a reaction scheme is proposed in which light oxygenates predominantly undergo reforming to CO2 and H2, with C–O bond breaking/hydrogenation (to afford alkanes) as a minor pathway. In a parallel process, aromatics undergo C–O cleavage/hydrogenation, affording benzenes and cyclohexanes. The highly alkylated nature of the products appears to be a consequence of the acidic nature of the reaction medium, favoring the occurrence of aromatic electrophilic substitution reactions.

Graphical abstractThe upgrading of a model bio-oil was studied over a series of supported Pt catalysts. Based on the product distribution, a reaction scheme is proposed in which light oxygenates predominantly undergo reforming to CO2 and H2, with C–O bond breaking/hydrogenation (to afford alkanes) as a minor pathway. In a parallel process, aromatics undergo C–O cleavage/hydrogenation, affording benzenes and cyclohexanes.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Bio-oil; Pyrolysis; Upgrading; Catalyst; Platinum
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 358, Issue 2, 1 May 2009, Pages 150–156
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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