Journal
RSC ADVANCES
Volume 3, Issue 13, Pages 4271-4280Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra00134b
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- NSERC
- CFI
- IUT
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A one-step, easy to scale-up, continuous process was developed to catalytically convert bio-ethanol into 1-butanol and 1-hexanol as chemicals or fuels, as well as some other compounds that are also useful as biogasoline. The process is novel as it employs ethanol at its sub-and supercritical states. The reactions were performed in a continuous-flow fixed-bed tubular reactor with gamma-alumina supported Ni catalysts at 135-300 degrees C at a weight hourly space velocity of 6.4-15.6 h(-1) using neat ethanol. The process at 250 degrees C and 176 bar with an 8% Ni/gamma-alumina catalyst led to ethanol conversion of 35%, with the highest selectivity of approximately 62% and 21% towards 1-butanol and 1-hexanol, respectively. In addition to 1-butanol and 1-hexanol, other minor biogasoline components such as butanal, and 2-pentanone, etc. were also synthesized from this process. The catalyst was found active for 18 h on stream in this study, and the regenerated catalysts retained their activities for the reactions.
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