Wszystkie pola: Y zeolites - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Copper-manganese-zinc spinels in zeolites : study of EMR spectra
Autorzy:: Decyk, P.
Więckowski, A. B.
Najder-Kozdrowska, L.
Bilkova, I.
Powiązania:: https://bibliotekanauki.pl/articles/146776.pdf
Data publikacji:: 2015
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: Cu-Mn-Zn spinels
electron magnetic resonance
paramagnetic complexes
Y zeolites
Opis:: The aim of this study is the application of electron magnetic resonance (EMR) spectroscopy to determine the interactions between NaY and HY zeolites and Cu-Mn-Zn spinels loaded onto the zeolite surfaces. The materials were characterized using XRD and IR spectroscopies. Four types of EMR lines were observed for Cu-Mn-Zn/NaY, Cu-Mn-Zn/HY samples. The difference between the EMR spectra recorded at 77 and 293 K has been shown. The spectra recorded at 77 K allowed us to distinguish between the species formed on NaY and HY zeolites. The EMR spectrum of Cu-Mn-Zn/NaY recorded at 77 K showed only one line attributed to antiferromagnetic spinels Cu1.4Mn1.6O4 and ZnMn2O4 or/and Cu0.5Zn0.5Mn2O4. The spinels appeared to be more stable (more strongly attached) on HY zeolite than on NaY one. It was proved that different strength of interactions between the zeolites and Cu-Mn-Zn spinels was caused by differences in the acidity of NaY and HY zeolites.
Źródło:: Nukleonika; 2015, 60, No. 3, part 1; 423-428
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Synthesis of kaolin-based zeolite Y and its application for adsorption of two carbonyl compound gases
Autorzy:: Warzybok, M.
Warchoł, J.
Powiązania:: https://bibliotekanauki.pl/articles/105191.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:: adsorption
acetone
methyl ethyl ketone
Y zeolites
Opis:: The aim of the study was to synthesize zeolite Y based on natural clay mineral and to determine its potential for adsorption of carbonyl compounds. The synthesis route consisted of four steps: thermal activation of kaolin into metakaolin; aging of reaction mixtures at ambient temperature; crystallization of the reaction mixture; washing and drying of the final product. The reaction mixture consisted of metakaolin silica gel (SiO2), sodium chloride (NaCl) and sodium hydroxide (NaOH). All substrates were used at an intended molar ratio. The physicochemical properties of the synthesized adsorbent were attained through the advanced instrumental analysis. The adsorption of acetone and methyl ethyl ketone (MEK) on synthesized zeolite as well as on four commercially available adsorbents and three natural materials was examined in a dedicated home-made installation. The results showed, that the synthesized zeolite Y has the highest affinity for acetone over other adsorbents, while its affinity for MEK is only a little lower then AC. Additionally, adsorption isotherms of acetone and MEK on zeolite Y were measured on a gravimetric balance. Experimental binding isotherms were fitted by a non-linear regression to five empirical equations. In both acetone and MEK cases, the best results of statistical tests were obtained for the Marczewski-Jaroniec model.
Źródło:: Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 1; 13-26
2300-5130
2300-8903
Pojawia się w:: Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:: Biblioteka Nauki

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