Zeolitic Materials with Hierarchical Porous Structures

During the past several years, different kinds of hierarchical structured zeolitic materials have been synthesized due to their highly attractive properties, such as superior mass/heat transfer characteristics, lower restriction of the diffusion of reactants in the mesopores, and low pressure drop....

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Veröffentlicht in:Advanced materials (Weinheim) Jg. 23; H. 22-23; S. 2602 - 2615
Hauptverfasser: Lopez-Orozco, Sofia, Inayat, Amer, Schwab, Andreas, Selvam, Thangaraj, Schwieger, Wilhelm
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Weinheim WILEY-VCH Verlag 17.06.2011
WILEY‐VCH Verlag
Schlagworte:
Alkenes - chemistry
Benzene - chemistry
Catalysis
Catalyst
Foams
Hierarchical zeolites
Methanol - chemistry
Phenol - chemistry
Porosity
Pressure
Structured composites
Zeolites - chemistry
ISSN:0935-9648, 1521-4095, 1521-4095
Online-Zugang:Volltext
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Zusammenfassung:During the past several years, different kinds of hierarchical structured zeolitic materials have been synthesized due to their highly attractive properties, such as superior mass/heat transfer characteristics, lower restriction of the diffusion of reactants in the mesopores, and low pressure drop. Our contribution provides general information regarding types and preparation methods of hierarchical zeolitic materials and their relative advantages and disadvantages. Thereafter, recent advances in the preparation and characterization of hierarchical zeolitic structures within the crystallites by post‐synthetic treatment methods, such as dealumination or desilication; and structured devices by in situ and ex situ zeolite coatings on open‐cellular ceramic foams as (non‐reactive as well as reactive) supports are highlighted. Specific advantages of using hierarchical zeolitic catalysts/structures in selected catalytic reactions, such as benzene to phenol (BTOP) and methanol to olefins (MTO) are presented. Hierarchical zeolitic materials have attractive properties, such as superior mass/heat transfer characteristics, lower restriction of the diffusion of the reactants in the mesopores, and low pressure drop. Our Progress Report provides general information about the recent advances in the preparation and characterization of hierarchical zeolitic structures combining two (e.g., micro–meso, micro–macro) or even three (micro–meso–macro) levels of porosity.
Bibliographie:istex:3DA2B7FC1E253CAFD950947934689D706C93FCE4
ark:/67375/WNG-3VKW9H56-Q
ArticleID:ADMA201100462
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0935-9648
1521-4095
1521-4095
DOI:10.1002/adma.201100462