Effect of ZnO on acid-base properties and catalytic performances of ZnO/ZrO2-SiO2 catalysts in 1,3-butadiene production from ethanol-water mixture
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10405923" target="_blank" >RIV/00216208:11320/19:10405923 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=DriC~JfGhY" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=DriC~JfGhY</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c9cy00991d" target="_blank" >10.1039/c9cy00991d</a>
Alternative languages
Result language
angličtina
Original language name
Effect of ZnO on acid-base properties and catalytic performances of ZnO/ZrO2-SiO2 catalysts in 1,3-butadiene production from ethanol-water mixture
Original language description
The effect of ZnO and the preparation method of ZnO/ZrO2-SiO2 catalysts on their acid-base properties and catalytic performances in the conversion of diluted ethanol mixtures into 1,3-butadiene (BD) is presented. Based on the results of the temperature-programmed desorption (TPD) of NH3/CO2, near-ambient pressure X-ray photoelectron spectrometry (NAP-XPS) with O-2/ethanol + H2O, adsorption of pyridine and deuterated chloroform followed by Fourier-transform infrared (FTIR) spectroscopy, and catalytic experiments, it has been concluded that the differences in activities and selectivities of the prepared catalysts can be attributed to the formation of different amounts of Zn-containing acidic or basic active sites. A wet-kneading procedure facilitates the preparation of a more active/selective catalyst as compared to that obtained using the incipient wetness impregnation of ZrO2-SiO2 with an aqueous solution of zinc salt. Dependencies between the acid-base capacity ratio of zinc oxides, calculated from the NH3/CO2-TPD and NAP-XPS data as well as the initial reaction rate of BD formation have been observed for ZnO/ZrO2-SiO2 catalysts. In the presence of a catalytic system with a predominance of acidic sites on the surface, higher ethanol conversion and BD selectivity can be achieved as opposed to systems involving a predominance of basic sites. The ZnO/ZrO2-SiO2 catalyst prepared by using zinc oxide nanoparticles and ZrO2-SiO2 provides a BD yield of similar to 52.4% in the conversion of 80% ethanol-20% H2O mixture (673 K, 1.3 g(EtOH) g(cat)(-1) h(-1)); a BD productivity of 0.4 g(BD) g(cat)(-1) h(-1) can be achieved.
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Catalysis: Science and Technology
ISSN
2044-4753
e-ISSN
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Volume of the periodical
9
Issue of the periodical within the volume
15
Country of publishing house
GB - UNITED KINGDOM
Number of pages
15
Pages from-to
3964-3978
UT code for WoS article
000484168400009
EID of the result in the Scopus database
2-s2.0-85070284922