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Green Chemistry
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DOI: 10.1039/C8GC01211C
COMMUNICATION
Green Chemistry
the other top 10 most productive catalysts found in the
literature at the different WHSVEtOH each were tested.
Admittedly, the difference in reaction conditions makes a
direct comparison partiality inaccurate, as we have
demonstrated that WHSVEtOH affects catalytic performances.
Nevertheless, these figures indicate that ZnTa-TUD-1 is the
most selective and stable catalyst at high ethanol flow,
boasting a 1,3-BD productivity of 2.45 g1,3-BD.gcat.h-1 after 3
hours. To the best of our knowledge, this makes it the most
productive catalyst recorded so far.
Conflicts of interest
There are no conflicts to declare.
Notes and references
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ZnTa-TUD-1 was revealed as a highly selective catalyst for the
conversion of ethanol to 1,3-butadiene. Its simple preparation
method allows us, in a one-pot operation, both to disperse the
active phase within the support and to generate a mesoporous
morphology beneficial to its catalytic activity. This does away
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A remarkable selectivity towards BD of 73% was observed
with ZnTa-TUD-1 after 3 h on stream at 400 °C, which was tied
with the total amount of surface acid sites. Using a WHSVEtOH
of 5.3 h-1 combined with the aforementioned selectivity, a 1,3-
BD productivity reaching 2.13 g1,3-BD.gcat.h-1 was attained.
Raising the WHSVEtOH to 8 h-1 decreased 1,3-BD yield, but
increased overall 1,3-BD productivity to 2.45 g1,3-BD.gcat.h-1, an
unprecedented value according to the literature. Because
productivity is considered a key factor in making the ETB
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hours—a phenomenon ostensibly attributed to its
morphology.14 Regeneration under air to remove deposed
carbonaceous species was only partially successful, but is
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characterization of the catalytic system is in progress to fully
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Acknowledgments
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Authors acknowledge the support from the French National
Research Agency (ANR-15-CE07-0018-01). Chevreul Institute (FR
2638), Ministère de l’Enseignement Supérieur, de la Recherche et
de l’Innovation, Région Hauts-de-France and FEDER are
acknowledged for supporting and funding partially this work.
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6 | Green Chem. 2018, 00, 1-3
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