Catalytic test reactions for the evaluation of hierarchical zeolites

Beitrag in einer Fachzeitschrift
(Review-Artikel)


Details zur Publikation

Autor(en): Hartmann M, Machoke A, Schwieger W
Zeitschrift: Chemical Society Reviews
Verlag: Royal Society of Chemistry
Jahr der Veröffentlichung: 2016
Band: 45
Heftnummer: 12
Seitenbereich: 3313-3330
ISSN: 0306-0012
eISSN: 1460-4744
Sprache: Englisch


Abstract


Hierarchical zeolites have received increasing attention in the last decade due to their outstanding catalytic performance. Several types of hierarchical zeolites can be prepared by a large number of different techniques. Hierarchical zeolites combine the intrinsic catalytic properties of conventional zeolites and the facilitated access and transport in the additional meso-or macropore system. In this tutorial review, we discuss several test reactions that have been explored to show the benefit of the hierarchical pore system with respect to their suitability to prove the positive effects of hierarchical porous zeolites. It is important to note that positive effects on activity, stability and less frequently selectivity observed for hierarchically structured catalysts not necessarily are only a consequence of the additional meso-or macropores but also the number, strength and location of active sites as well as defects and impurities. With regard to these aspects, the test reaction has to be chosen carefully and potential changes in the chemistry of the catalyst have to be considered as well. In addition to the determination of conversion, yield and selectivity, we will show that the calculation of the activation energy and the determination of the Thiele modulus and the effectiveness factor are good indicators of the presence or absence of diffusion limitations in hierarchical zeolites compared to their parent materials.



FAU-Autoren / FAU-Herausgeber

Hartmann, Martin Prof. Dr.
Professur für Katalyse
Machoke, Albert Dr.-Ing.
Lehrstuhl für Chemische Reaktionstechnik
Schwieger, Wilhelm Prof. Dr.
Professur für Technische Chemie (Reaktionstechnik)


Zusätzliche Organisationseinheit(en)
Interdisziplinäres Zentrum Erlangen Catalysis Resource Center (ECRC)
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Hartmann, M., Machoke, A., & Schwieger, W. (2016). Catalytic test reactions for the evaluation of hierarchical zeolites. Chemical Society Reviews, 45(12), 3313-3330. https://dx.doi.org/10.1039/c5cs00935a

MLA:
Hartmann, Martin, Albert Machoke, and Wilhelm Schwieger. "Catalytic test reactions for the evaluation of hierarchical zeolites." Chemical Society Reviews 45.12 (2016): 3313-3330.

BibTeX: 

Zuletzt aktualisiert 2018-08-08 um 17:38