- Tytuł:
- Comparative study of continuous-flow microreactors based on silica monoliths modified with lewis acid centres
- Autorzy:
-
Ciemięga, A.
Maresz, K.
Malinowski, J. J.
Mrowiec-Białoń, J. - Powiązania:
- https://bibliotekanauki.pl/articles/185145.pdf
- Data publikacji:
- 2018
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
flow chemistry
silica monolith
Lewis acid centres
MPV reduction
przepływ chemii
monolit krzemionkowy
Centra kwasu Lewisa
Redukcja MPV - Opis:
- Silica multichannel monoliths modified with zirconia, titania and alumina have been used as reactive cores of microreactors and studied in chemoselective reduction (MPV) of cyclohexanon/benzaldehyde with 2-butanol as a hydrogen donor. The attachment of metal oxides to the silica surface was confirmed by FT–IR spectroscopy, and dispersion of metal oxides was studied by UV–Vis spectroscopy. the catalytic activity of the lewis acid centres in both chemical processes decreased in the order zirconia > alumina > titania. This activity is in good agreement with dispersion and coordination of metal species. good stability of zirconia-grafted reactors was confirmed. high porosity of the monoliths and the presence of large meandering flow-through channels with a diameter of ca. 30 mm facilitate fluid transport and very effective mixing in the microreactors. The whole synthesis process is perfectly in line with trends of modern flow chemistry.
- Źródło:
-
Chemical and Process Engineering; 2018, 39, 1; 33--38
0208-6425
2300-1925 - Pojawia się w:
- Chemical and Process Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł