Influence of Mg−Al Mixed Oxide Compositions on Their Properties and Performance in Aldol Condensation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62243136%3A_____%2F17%3AN0000007" target="_blank" >RIV/62243136:_____/17:N0000007 - isvavai.cz</a>

Result on the web

<a href="http://pubs.acs.org/doi/abs/10.1021/acs.iecr.7b03367" target="_blank" >http://pubs.acs.org/doi/abs/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>

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 °C. The physicochemical properties of the samples were investigated by XRD, N2 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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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

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)

Publication year

2017

Confidentiality

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

Name of the periodical

Industrial & Engineering Chemistry Research

ISSN

1520-5045

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

13411-13422

UT code for WoS article

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EID of the result in the Scopus database

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