Catalytic hydrogenation of short chain carboxylic acids typical of model compound found in bio-oils

Ahmed Lawal; Abarasi Hart; Helen Daly; Christopher Hardacre; Joe Wood

doi:10.1021/acs.iecr.9b01093

Catalytic hydrogenation of short chain carboxylic acids typical of model compound found in bio-oils

Ahmed Lawal, Abarasi Hart, Helen Daly, Christopher Hardacre, Joe Wood

Chemical Engineering

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

7 Citations (Scopus)

227 Downloads (Pure)

Abstract

Due to the complexity of bio-oil many studies have focused on model compounds which mimic components in bio-oil. In this paper, the hydrogenation of short chain (C₂-C₄) carboxylic acids in hexane using a Parr reactor and commercial Pt supported on Al₂O₃, SiO₂, carbon, and graphite and prepared Pt and Pt-Re on TiO₂ catalysts was studied. With acetic acid, ethanol selectivity was found to be 80% (4%Pt-4%Re/TiO₂) and 23% (4%Pt/TiO₂), and no ethanol was observed with the other catalysts at 200 °C, 40 bar, 0.3 g of catalyst, and 1000 min^-1. A Taguchi optimization approach was carried out from temperature 80-200 °C, pressure 10-40 bar, time 1-4 h, catalyst 0.1-0.4 g, and stirring speed 400-1000 min^-1 using 4%Pt/TiO₂ . The optimum conditions determined were 160 °C, 40 bar, 4 h, 0.4 g, and 1000 min ^-1 for ethanol production. 4%Pt/TiO₂ was more selective toward esters, while 4%Pt-Re/TiO₂ increased alcohol production with increasing Re (1-4%) loading.

Original language	English
Pages (from-to)	7998-8008
Number of pages	11
Journal	Industrial & Engineering Chemistry Research
Volume	58
Issue number	19
Early online date	18 Apr 2019
DOIs	https://doi.org/10.1021/acs.iecr.9b01093
Publication status	Published - 15 May 2019

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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Ahmed_Lawal_et_al_Catalytic_hydrogenation_of_short_chain_carboxylic_acids_Industrial_&_Engineering_Chemistry_Research_2019
Checked for eligibility: 03/07/2019 This document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial & Engineering Chemistry Research, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see: https://doi.org/10.1021/acs.iecr.9b01093
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Cite this

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abstract = "Due to the complexity of bio-oil many studies have focused on model compounds which mimic components in bio-oil. In this paper, the hydrogenation of short chain (C2-C4) carboxylic acids in hexane using a Parr reactor and commercial Pt supported on Al2O3, SiO2, carbon, and graphite and prepared Pt and Pt-Re on TiO2 catalysts was studied. With acetic acid, ethanol selectivity was found to be 80% (4%Pt-4%Re/TiO2) and 23% (4%Pt/TiO2), and no ethanol was observed with the other catalysts at 200 °C, 40 bar, 0.3 g of catalyst, and 1000 min-1. A Taguchi optimization approach was carried out from temperature 80-200 °C, pressure 10-40 bar, time 1-4 h, catalyst 0.1-0.4 g, and stirring speed 400-1000 min-1 using 4%Pt/TiO2 . The optimum conditions determined were 160 °C, 40 bar, 4 h, 0.4 g, and 1000 min -1 for ethanol production. 4%Pt/TiO2 was more selective toward esters, while 4%Pt-Re/TiO2 increased alcohol production with increasing Re (1-4%) loading. ",

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AU - Daly, Helen

AU - Hardacre, Christopher

AU - Wood, Joe

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Catalytic hydrogenation of short chain carboxylic acids typical of model compound found in bio-oils

Abstract

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