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Issue 6, 2016
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Selective hydrodeoxygenation of bio-oil derived products: acetic acid to propylene over hybrid CeO2–Cu/zeolite catalysts

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Abstract

Conversion of acetic acid, the light oxygenate from biomass pyrolysis, to propylene can be achieved via keto-hydrodeoxygenation (KHDO) over hybrid CeO2–Cu/zeolite catalysts at >573 K under atmospheric H2. The catalyst containing CeO2 and Cu/HY (25 wt% of Cu/HY) was employed to obtain up to 85% conversion of acetic acid with 49% selectivity to propylene. Acetone, propylene and propane are obtained via ketonization–hydrogenation–dehydration over the three-component catalyst, while ethanol, acetaldehyde, ethylene, ethane and ethyl acetate can also be produced from hydrogenation–dehydration over Cu/zeolites alone. The catalyst containing Cu/HY provides higher selectivity to olefin products, as compared to that containing Cu/HZSM-5. The reaction is suppressed by the presence of water. Nevertheless, high catalyst stability (>60 hours on stream) can be obtained. The KHDO can be applicable for the conversion of acetic acid, a biomass derived product, to hydrocarbons using a sequential bed system of the three-component catalyst and HZSM-5 catalyst.

Graphical abstract: Selective hydrodeoxygenation of bio-oil derived products: acetic acid to propylene over hybrid CeO2–Cu/zeolite catalysts

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Article information


Submitted
05 Sep 2015
Accepted
09 Oct 2015
First published
13 Oct 2015

Catal. Sci. Technol., 2016,6, 1737-1745
Article type
Paper
Author version available

Selective hydrodeoxygenation of bio-oil derived products: acetic acid to propylene over hybrid CeO2–Cu/zeolite catalysts

A. Witsuthammakul and T. Sooknoi, Catal. Sci. Technol., 2016, 6, 1737
DOI: 10.1039/C5CY01485A

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