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). Issue 18 (22nd March 2021)

• Record Type: Journal Article
• Authors: Cnudde, Pieter; Redekop, Evgeniy A.; Dai, Weili; Porcaro, Natale G.; Waroquier, Michel; Bordiga, Silvia; Hunger, Michael; Li, Landong; Olsbye, Unni; Van Speybroeck, Veronique
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 18(2021)
• Page Start: 9729
• Page End: 9729
• Publication Date: 2021-03-22
• Subjects: acid sites -- diffusion -- molecular dynamics -- olefins -- zeolites; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202103009
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract : 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).