Synthesis methodology, stability, acidity, and catalytic behavior of the 18×1018×10 member ring pores ITQ-33 zeolite
2008; Elsevier BV; Volume: 254; Issue: 1 Linguagem: Inglês
10.1016/j.jcat.2007.12.003
ISSN1090-2694
AutoresManuel Moliner, María J. Díaz‐Cabañas, V. Fornés, Cristina Martı́nez, Avelino Corma,
Tópico(s)Mesoporous Materials and Catalysis
ResumoWe 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.
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