Synthesis methodology, stability, acidity, and catalytic behavior of the 18×1018×10 member ring pores ITQ-33 zeolite

Autor:	Vicente Fornés, Manuel Moliner, Cristina Martínez, María J. Díaz-Cabañas, Avelino Corma
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Alkylation Molecular sieve Heterogeneous catalysis Catalysis Hydrothermal circulation Acid strength chemistry Chemical engineering Molecule Organic chemistry Physical and Theoretical Chemistry Zeolite
Zdroj:	Journal of Catalysis. 254:101-109
ISSN:	0021-9517
DOI:	10.1016/j.jcat.2007.12.003
Popis:	We used a flexible organic structure-directing agent (OSDA) and high-throughput (HT) synthesis techniques to explore a large composition region. A zeolite with the largest pores reported to date (ITQ-33) was found under very unusual synthesis conditions, together with other known structures. A second HT experimental design allowed, finally synthesizing pure ITQ-33. We studied the thermal and hydrothermal stability and acid properties of the zeolite. We investigated the role of pore diameter on zeolite acid strength by comparing the 18-ring pore (ITQ-33) with a 12-MR pore (ITQ-17) zeolite with the same framework composition. Finally, we compared the catalytic properties of ITQ-33 for reactant molecules of different sizes with those of 12-MR (Beta) and 14-MR (UTD-1) zeolites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7c5000dc120a80eb65083a76657bf81 https://doi.org/10.1016/j.jcat.2007.12.003 Zobrazit plný text záznamu Full Text from ScienceDirect