faujasite zeolite
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2021 ◽  
Author(s):  
Xinyu Li ◽  
He Han ◽  
Wenqian Xu ◽  
Son-jong Hwang ◽  
Peng Lu ◽  
...  
Keyword(s):  

Author(s):  
Xinyu Li ◽  
He Han ◽  
Wenqian Xu ◽  
Son-jong Hwang ◽  
Peng Lu ◽  
...  
Keyword(s):  

Author(s):  
Quanli Ke ◽  
Ibrahim Khalil ◽  
Brent Smeyers ◽  
Zheng Li ◽  
Rodrigo Oliveira‐Silva ◽  
...  

2021 ◽  
Author(s):  
Michiel Dusselier ◽  
Quanli Ke ◽  
Ibrahim Khalil ◽  
Brent Smeyers ◽  
Zheng Li ◽  
...  

Author(s):  
Tarik Ammouli ◽  
Jean-Louis Paillaud ◽  
Habiba Nouali ◽  
Régis Stephan ◽  
Marie-Christine Hanf ◽  
...  

Author(s):  
Brahim Mezari ◽  
Pieter C. M. M. Magusin ◽  
Sami M. T. Almutairi ◽  
Evgeny A. Pidko ◽  
Emiel J. M. Hensen

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 98
Author(s):  
Volker Mauer ◽  
Christian Bläker ◽  
Christoph Pasel ◽  
Dieter Bathen

In addition to the adsorption mechanism, the heat released during exothermic adsorption influences the chemical reactions that follow during heterogeneous catalysis. Both steps depend on the structure and surface chemistry of the catalyst. An example of a typical catalyst is the faujasite zeolite. For faujasite zeolites, the influence of the Si/Al ratio and the number of Na+ and Ca2+ cations on the heat of adsorption was therefore investigated in a systematic study. A comparison between a NaX (Sodium type X faujasite) and a NaY (Sodium type Y faujasite) zeolite reveals that a higher Si/Al ratio and therefore a smaller number of the cations in faujasite zeolites leads to lower loadings and heats. The exchange of Na+ cations for Ca2+ cations also has an influence on the adsorption process. Loadings and heats first decrease slightly at a low degree of exchange and increase significantly with higher calcium contents. If stronger interactions are required for heterogeneous catalysis, then the CaNaX zeolites must have a degree of exchange above 53%. The energetic contributions show that the highest-quality adsorption sites III and III’ make a contribution to the load-dependent heat of adsorption, which is about 1.4 times (site III) and about 1.8 times (site III’) larger than that of adsorption site II.


2021 ◽  
Vol 581 ◽  
pp. 919-927
Author(s):  
Sarah Komaty ◽  
Hayriye Özçelik ◽  
Moussa Zaarour ◽  
Aurélie Ferre ◽  
Samuel Valable ◽  
...  

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