Successive Vapor-Phase Guerbet Condensation of Ethanol and 1-Butanol to 2-Ethyl-1-hexanol over Hydroxyapatite Catalysts in a Flow Reactor
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10440162" target="_blank" >RIV/00216208:11320/21:10440162 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WNm6qAUmEm" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WNm6qAUmEm</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acssuschemeng.1c06094" target="_blank" >10.1021/acssuschemeng.1c06094</a>
Alternative languages
Result language
angličtina
Original language name
Successive Vapor-Phase Guerbet Condensation of Ethanol and 1-Butanol to 2-Ethyl-1-hexanol over Hydroxyapatite Catalysts in a Flow Reactor
Original language description
Calcium-containing hydroxyapatites including those modified with magnesium and strontium were prepared and tested as promising catalysts for the sustainable production of higher linear and branched alcohols from bioethanol. The hydroxyapatite catalysts were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and nuclear magnetic resonance spectroscopy, and temperature-programed desorption of NH3 and CO2. The partial replacement of Ca2+ ions by Mg2+ and Sr2+ in the hydroxyapatite structure was found to cause the deformation of its crystal lattice with the possible formation of amorphous calcium phosphate species. Moreover, there is both a decrease in the number and strength of the surface base sites of the catalysts and a redistribution of the strength of acid sites. The catalysts showed high activity and selectivity during the vapor-phase condensation of both aqueous ethanol into 1-butanol and 1-butanol into 2-ethyl-1-hexanol; however, a gradual deactivation of the catalysts occurs as a result of the blocking of aldol condensation sites. The highest selectivity values for 1-butanol and C4+ oxygenates (57 and 79.2% at 573 K and 0.36 L.L-cat(-1).h(-1)) and for 2-ethyl-1-hexanol (77.5% at 573 K and 0.11 L.L-cat(-1).h(-1)) were achieved over the calcium-containing hydroxyapatite catalyst modified with magnesium, which also showed an advanced resistance to deactivation with increasing time-on-stream.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/LM2018116" target="_blank" >LM2018116: Surface Physics Laboratory - Materials Science Beamline</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Sustainable Chemistry & Engineering
ISSN
2168-0485
e-ISSN
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Volume of the periodical
9
Issue of the periodical within the volume
51
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
17289-17300
UT code for WoS article
000732032000001
EID of the result in the Scopus database
2-s2.0-85121582815