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

Courtney A. Fisk; Tonya Morgan; Yaying Ji; Mark Crocker; Czarena Crofcheck; Sam A. Lewis

doi:10.1016/j.apcata.2009.02.006

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

Courtney A. Fisk, Tonya Morgan, Yaying Ji, Mark Crocker, Czarena Crofcheck, Sam A. Lewis

Research output: Contribution to journal › Article › peer-review

237 Scopus citations

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.

Original language	English
Pages (from-to)	150-156
Number of pages	7
Journal	Applied Catalysis A: General
Volume	358
Issue number	2
DOIs	https://doi.org/10.1016/j.apcata.2009.02.006
State	Published - May 1 2009

Bibliographical note

Funding Information:
The authors thank Gerald Thomas for performing the XRD and XRF measurements, Eduardo Santillan-Jimenez for HRTEM analyses, and Dr. John Storey for helpful discussions. Financial support from the Kentucky Rural Energy Consortium is gratefully acknowledged.

Keywords

Bio-oil
Catalyst
Platinum
Pyrolysis
Upgrading

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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10.1016/j.apcata.2009.02.006

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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.",

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author = "Fisk, {Courtney A.} and Tonya Morgan and Yaying Ji and Mark Crocker and Czarena Crofcheck and Lewis, {Sam A.}",

note = "Funding Information: The authors thank Gerald Thomas for performing the XRD and XRF measurements, Eduardo Santillan-Jimenez for HRTEM analyses, and Dr. John Storey for helpful discussions. Financial support from the Kentucky Rural Energy Consortium is gratefully acknowledged. ",

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AU - Morgan, Tonya

AU - Ji, Yaying

AU - Crocker, Mark

AU - Crofcheck, Czarena

AU - Lewis, Sam A.

N1 - Funding Information: The authors thank Gerald Thomas for performing the XRD and XRF measurements, Eduardo Santillan-Jimenez for HRTEM analyses, and Dr. John Storey for helpful discussions. Financial support from the Kentucky Rural Energy Consortium is gratefully acknowledged.

PY - 2009/5/1

Y1 - 2009/5/1

N2 - 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.

AB - 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.

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KW - Pyrolysis

KW - Upgrading

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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