Acetic Acid Ketonization over Fe3O4/SiO2 for Pyrolysis Bio-Oil Upgrading

James A. Bennett; Christopher M.A. Parlett; Mark A. Isaacs; Lee J. Durndell; Luca Olivi; Adam F. Lee; Karen Wilson

doi:10.1002/cctc.201601269

Acetic Acid Ketonization over Fe₃O₄/SiO₂ for Pyrolysis Bio-Oil Upgrading

James A. Bennett, Christopher M.A. Parlett, Mark A. Isaacs, Lee J. Durndell, Luca Olivi, Adam F. Lee^*, Karen Wilson

^*Corresponding author for this work

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

Abstract

A family of silica-supported, magnetite nanoparticle catalysts was synthesised and investigated for continuous-flow acetic acid ketonisation as a model pyrolysis bio-oil upgrading reaction. The physico-chemical properties of Fe₃O₄/SiO₂ catalysts were characterised by using high-resolution transmission electron microscopy, X-ray absorption spectroscopy, X-ray photo-electron spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, thermogravimetric analysis and porosimetry. The acid site densities were inversely proportional to the Fe₃O₄ particle size, although the acid strength and Lewis character were size-invariant, and correlated with the specific activity for the vapour-phase acetic ketonisation to acetone. A constant activation energy (∼110 kJ mol⁻¹), turnover frequency (∼13 h⁻¹) and selectivity to acetone of 60 % were observed for ketonisation across the catalyst series, which implies that Fe₃O₄ is the principal active component of Red Mud waste.

Original language	English
Pages (from-to)	1648-1654
Number of pages	7
Journal	ChemCatChem
Volume	9
Issue number	9
DOIs	https://doi.org/10.1002/cctc.201601269
Publication status	Published - 10 May 2017

Keywords

carboxylic acids
iron
nanoparticles
supported catalysts
waste prevention

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/cctc.201601269

Cite this

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title = "Acetic Acid Ketonization over Fe3O4/SiO2 for Pyrolysis Bio-Oil Upgrading",

abstract = "A family of silica-supported, magnetite nanoparticle catalysts was synthesised and investigated for continuous-flow acetic acid ketonisation as a model pyrolysis bio-oil upgrading reaction. The physico-chemical properties of Fe3O4/SiO2 catalysts were characterised by using high-resolution transmission electron microscopy, X-ray absorption spectroscopy, X-ray photo-electron spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, thermogravimetric analysis and porosimetry. The acid site densities were inversely proportional to the Fe3O4 particle size, although the acid strength and Lewis character were size-invariant, and correlated with the specific activity for the vapour-phase acetic ketonisation to acetone. A constant activation energy (∼110 kJ mol−1), turnover frequency (∼13 h−1) and selectivity to acetone of 60 % were observed for ketonisation across the catalyst series, which implies that Fe3O4 is the principal active component of Red Mud waste.",

keywords = "carboxylic acids, iron, nanoparticles, supported catalysts, waste prevention",

author = "Bennett, {James A.} and Parlett, {Christopher M.A.} and Isaacs, {Mark A.} and Durndell, {Lee J.} and Luca Olivi and Lee, {Adam F.} and Karen Wilson",

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AU - Parlett, Christopher M.A.

AU - Isaacs, Mark A.

AU - Durndell, Lee J.

AU - Olivi, Luca

AU - Lee, Adam F.

AU - Wilson, Karen

PY - 2017/5/10

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AB - A family of silica-supported, magnetite nanoparticle catalysts was synthesised and investigated for continuous-flow acetic acid ketonisation as a model pyrolysis bio-oil upgrading reaction. The physico-chemical properties of Fe3O4/SiO2 catalysts were characterised by using high-resolution transmission electron microscopy, X-ray absorption spectroscopy, X-ray photo-electron spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, thermogravimetric analysis and porosimetry. The acid site densities were inversely proportional to the Fe3O4 particle size, although the acid strength and Lewis character were size-invariant, and correlated with the specific activity for the vapour-phase acetic ketonisation to acetone. A constant activation energy (∼110 kJ mol−1), turnover frequency (∼13 h−1) and selectivity to acetone of 60 % were observed for ketonisation across the catalyst series, which implies that Fe3O4 is the principal active component of Red Mud waste.

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