Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Polish Journal of Chemical Technology

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Reinvestigations of the Li2O–Al2O3 system. Part I: LiAlO2 and Li3AlO3

Tabero Piotr, Frąckowiak Piotr, Dąbrowska Grażyna

Polish Journal of Chemical Technology

2021

Vol. 23, nr 3

30--36

Reinvestigations of the Li2O–Al2O3 system focused on the synthesis and properties of LiAlO2 and Li3AlO3 phases have been performed with the help of XRD and IR measuring techniques and Li2CO3, LiOH.H2O, Al2O3-sl., α-Al2O3, Al(NO3)3.9H2O and boehmite as reactants. Results of investigations have shown the formation of α-, β-, and γ- polymorphs of LiAlO2. It was found that only the use of LiOH.H2O as a reactant yields to β-LiAlO2 as a reaction product. On the other hand, it was proved that Li3AlO3 does not form in the Li2O–Al2O3 system. A new method for the synthesis of α-LiAlO2 was developed, consisting in grinding the mixture of Li2CO3 and Al(NO3)3.9H2O and heating the obtained paste at the temperature range of 400–600°C. The IR spectroscopy was used to characterize obtained phases.

Enthalpy of isopropanol adsorption on zeolite

Jabłoński Maciej, Dzienisz Alicja, Sawicka Marta, Wróblewska Elwira, Lubkowski Krzysztof, Dąbrowska Grażyna, Piz Mateusz, Sreńscek-Nazzal Joanna

Polish Journal of Chemical Technology

2019

Vol. 21, nr 4

58--65

The enthalpy of isopropanol adsorption on ZSM-5 (Zeolite Socony Mobil Framework Type MFI) was determined by the static adsorption method at the temperature range from 20°C to 100°C. Langmuir and Huttig models of equilibrium adsorption have been used to calculate the enthalpy of isopropanol adsorption at these conditions. Adsorption isotherms determined by the flow method at 20°C and 30°C have been also used in the calculations. The obtained values of isopropanol adsorption enthalpy were compared with the values of isopropanol evaporation enthalpy and with the results obtained from isopropanol and water desorption measurements with thermogravimetry and differential scanning calorimetry methods.