Mixed Oxides: Role of Washing and Residual Ions in Transesterification Reactions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00640614" target="_blank" >RIV/67985858:_____/25:00640614 - isvavai.cz</a>
Alternative codes found
RIV/00216275:25310/25:39923105 RIV/61989100:27730/25:10259658
Result on the web
<a href="https://pubs.acs.org/doi/pdf/10.1021/acsomega.5c08243?ref=article_openPDF" target="_blank" >https://pubs.acs.org/doi/pdf/10.1021/acsomega.5c08243?ref=article_openPDF</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsomega.5c08243" target="_blank" >10.1021/acsomega.5c08243</a>
Alternative languages
Result language
angličtina
Original language name
Mixed Oxides: Role of Washing and Residual Ions in Transesterification Reactions
Original language description
The mixed oxides (MOs) serve as catalysts for many reactions such as transesterification, transformation of ethanol to butanol, catalytic cracking, or dehydrogenation reactions. MOs are usually synthesized from hydrotalcites, which are often prepared by the coprecipitation method. However, some chemicals can remain after coprecipitation and influence the properties of MOs, includingnsubsequent applications. The novelty lies in investigating how the residual chemicals affect the properties of hydrotalcites, MOs, andnthe transesterification reaction (conducted in both one- and twostep processes). Mg−Al and Mg−Fe hydrotalcites were synthesizednfrom chloride and nitrate salts via coprecipitation with NaOH, followed by washing with varying amounts of redistilled water,nresulting in variations in the sodium ion content (more water, less sodium ions). All materials were characterized by many analytical methods such as X-ray diffraction, metal determination, scanning electron microscopy, textural properties, and basicity determination. MOs synthesized from chlorides contained stable NaCl, which is not catalytically active, and blocked the pores, leading to a reduced surface area and, consequently, a lower transesterification yield. In contrast, MOs prepared from nitrates contained unstable NaNO3, which decomposed during calcination and, upon exposure to water, formed basic species (NaOH) that promoted transesterification. Therefore, the effect of residual sodium varies depending on the material precursors. This understanding helps us to improve the synthesis of hydrotalcites and 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
20402 - Chemical process engineering
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Omega
ISSN
2470-1343
e-ISSN
2470-1343
Volume of the periodical
10
Issue of the periodical within the volume
44
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
53341-53349
UT code for WoS article
001603067400001
EID of the result in the Scopus database
2-s2.0-105021256488