Successive Vapor-Phase Guerbet Condensation of Ethanol and 1-Butanol to 2-Ethyl-1-hexanol over Hydroxyapatite Catalysts in a Flow Reactor

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Successive Vapor-Phase Guerbet Condensation of Ethanol and 1-Butanol to 2-Ethyl-1-hexanol over Hydroxyapatite Catalysts in a Flow Reactor

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Successive Vapor-Phase Guerbet Condensation of Ethanol and 1-Butanol to 2-Ethyl-1-hexanol over Hydroxyapatite Catalysts in a Flow Reactor

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LM2018116" target="_blank" >LM2018116: Laboratoř fyziky povrchů - Optická dráha pro výzkum materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ACS Sustainable Chemistry &amp; Engineering

ISSN

2168-0485

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

51

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

17289-17300

Kód UT WoS článku

000732032000001

EID výsledku v databázi Scopus

2-s2.0-85121582815