Influence of Mg-Al Mixed Oxide Compositions on Their Properties and Performance in Aldol Condensation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39911957" target="_blank" >RIV/00216275:25310/17:39911957 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/17:43913298 RIV/60461373:22320/17:43913298 RIV/60461373:22350/17:43913298
Result on the web
<a href="http://dx.doi.org/10.1021/acs.iecr.7b03367" target="_blank" >http://dx.doi.org/10.1021/acs.iecr.7b03367</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.iecr.7b03367" target="_blank" >10.1021/acs.iecr.7b03367</a>
Alternative languages
Result language
angličtina
Original language name
Influence of Mg-Al Mixed Oxide Compositions on Their Properties and Performance in Aldol Condensation
Original language description
The influence of chemical composition of Mg-Al mixed oxides on their properties and catalytic performance in aldol condensation of furfural and acetone was studied. Pure alumina, Mg-Al layered double hydroxides with a wide range of Mg/Al molar ratios from 0.5 to 15, and pure magnesia were prepared by the same synthesis method, and corresponding oxides were produced by calcination of the as-prepared samples at T = 450 degrees C. The physicochemical properties of the samples were investigated by XRD, N-2 physisorption, SEM, CO2-TPD, and NH3-TPD, and their catalytic performance was evaluated in aldol condensation of furfural and acetone. SEM images revealed that the Al content in the samples influenced the size and the morphology of both large agglomerates and plate-like crystals. The CO2-TPD measurements proved that the concentration of basic sites and the distribution of their strengths was determined by the Mg/Al molar ratio in the Mg-Al mixed oxides. However, over the whole range of Mg/Al compositions studied here, no clear correlation between the chemical composition and the number and strength of basic sites was found. Nonetheless, the change in the strength and in the density of basic sites affected the catalytic performance of calcined Mg-Al mixed oxides. Additionally, morphology and crystal size also influenced the performance of the catalysts. Finally, the composition of reaction products was affected by acid base and textural properties of the prepared Mg-Al-mixed oxides.
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
20400 - Chemical engineering
Result continuities
Project
<a href="/en/project/GA15-21817S" target="_blank" >GA15-21817S: Analysis of the structure/activity relationship of Mg/Al, Ca/Al and Zn/Al mixed oxides in aldol condensation and transesterification reactions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Industrial & Engineering Chemistry Reseach
ISSN
0888-5885
e-ISSN
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Volume of the periodical
56
Issue of the periodical within the volume
45
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
13412-13423
UT code for WoS article
000415785500053
EID of the result in the Scopus database
2-s2.0-85034271803