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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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 &amp; Engineering Chemistry Reseach

  • ISSN

    0888-5885

  • e-ISSN

  • 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