Intrinsic kinetics of the methanol dehydration to dimethyl ether over laboratory and commercial γ‐alumina: a comparative study

2021 ◽  
Author(s):  
Alexey Zhokh ◽  
Andrey Trypolskyi ◽  
Valentina Gritsenko ◽  
Tamila Serebrii ◽  
Lixiu Zhang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Dimethyl Ether ◽  
Methanol Dehydration ◽  
Intrinsic Kinetics ◽  
Kinetics Of

Effect of H-ZSM-5 zeolite content on the intrinsic kinetics of the methanol dehydration to dimethyl ether over H-ZSM-5/Al2O3 molded catalyst

2022 ◽  
Author(s):  
Alexey Zhokh ◽  
Andrii Trypolskyi ◽  
Valentina Gritsenko ◽  
Peter E. Strizhak
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Ether ◽  
Methanol Dehydration ◽  
Intrinsic Kinetics ◽  
Zeolite Content ◽  
Kinetics Of

A series of H-ZSM-5/Al2O3 molded catalysts with various zeolite/alumina ratios has been prepared and their catalytic activity in the methanol dehydration to dimethyl ether has been studied. Based on Langmuir-Hinshelwood...

Deactivation kinetics of γ-Al2O3 catalyst in methanol dehydration to dimethyl ether

Fuel ◽  
2021 ◽  
pp. 122443
Author(s):  
Saeed Sahebdelfar ◽  
Parisa Moghimpour Bijani ◽  
Fereydoon Yaripour
Keyword(s):  
Dimethyl Ether ◽  
Methanol Dehydration ◽  
Deactivation Kinetics ◽  
Kinetics Of ◽  
Al2o3 Catalyst

scholarly journals Comparative Study of Chemical Stability of Two H1Antihistaminic Drugs, Terfenadine and ItsIn VivoMetabolite Fexofenadine, Using LC-UV Methods

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Anna Gumieniczek ◽  
Anna Berecka-Rycerz ◽  
Rafał Pietraś ◽  
Izabela Kozak ◽  
Karolina Lejwoda ◽  
...  
Keyword(s):  
Comparative Study ◽  
Chemical Stability ◽  
First Order ◽  
First Order Kinetics ◽  
Kinetics Of Degradation ◽  
Effects Of Temperature ◽  
High Doses ◽  
Antihistaminic Drugs ◽  
Kinetics Of

A comparative study of chemical stability of terfenadine (TER) and itsin vivometabolite fexofenadine (FEX) was performed. Both TER and FEX were subjected to high temperature at different pH and UV/VIS light at different pH and then quantitatively analyzed using new validated LC-UV methods. These methods were used to monitor the degradation processes and to determine the kinetics of degradation for both the compounds. As far as the effects of temperature and pH were concerned, FEX occurred more sensitive to degradation than TER. As far as the effects of UV/VIS light and pH were concerned, the both drugs were similarly sensitive to high doses of light. Using all stress conditions, the processes of degradation of TER and FEX followed the first-order kinetics. The results obtained for these two antihistaminic drugs could be helpful in developing their new derivatives with higher activity and stability at the same time.

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