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Cover Picture: Experimental and Theoretical Evidence for the Promotional Effect of Acid Sites on the Diffusion of Alkenes through Small‐Pore Zeolites (Angew. Chem. Int. Ed. 18/2021)
Author(s) -
Cnudde Pieter,
Redekop Evgeniy A.,
Dai Weili,
Porcaro Natale G.,
Waroquier Michel,
Bordiga Silvia,
Hunger Michael,
Li Landong,
Olsbye Unni,
Van Speybroeck Veronique
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202103009
Subject(s) - diffusion , brønsted–lowry acid–base theory , chemistry , catalysis , cover (algebra) , chemical physics , computational chemistry , organic chemistry , thermodynamics , physics , mechanical engineering , engineering
By means of a synergistic theoretical and experimental approach, Veronique Van Speybroeck et al. show in their Research Article on page 10016 that the presence of Brønsted acid sites promotes ethene diffusion through the cages of H‐SAPO‐34, whereas ethane diffusion remains invariant regarding the acid site density. The interaction of ethene with the acid sites (yellow dots) facilitates the diffusion through the catalyst, leading to a shorter diffusion path (blue pathway) compared to ethane, which follows a random trajectory (orange pathway).