Synthesis and catalytic application of hierarchical materials obtained from lamellar precursors containing vanadium

• Grant number: 15/25850-2
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: May 16, 2016
• End date: May 15, 2017
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Celso Valentim Santilli
• Grantee: Thiago Faheina Chaves
• Supervisor: Joaquin Perez Pariente
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Institution abroad: Instituto de Catálisis y Petroleoquímica (ICP), Spain
• Associated to the scholarship: 14/11952-5 - Study of the formation of ordered hierarchical materials by a supramolecular structure in emulsions using zeolite precursors, BP.PD

Abstract

Currently, there has been great interest in the development of hierarchical zeolites, which are materials having at least two levels of porosities. Hierarchical zeolites have an improved catalytic activity in reactions suffering from steric and/or diffusional limitations. Furthermore, the additional porosity oers an ideal space for the deposition of additional active phases and for functionalization with organic molecules. Different kind of methods have been developed in order to generate a secondary porosity in zeolites. Among them, the use of organosilanes as structure directing agent is one of the methodologies used for secondary porosity. This method has been successfully applied to traditional zeolites, but there are few studies reporting the synthesis using lamellar zeolites. The lamellar zeolites have attracted attention recently due to their high external surface area, and their catalytic results are better than conventional zeolites. Based on this, investigate the formation of hierarchical structures using zeolitic lamellar precursors appears to be very interesting. In this context, this project proposes using zeolitic lamellar precursors (MCM-22 (P)) in the formation of hierarchical structures. The secondary porosity may increase the dispersion/insertion of the oxidant phase of the catalyst, providing a higher number of active sites and accessibility. This is important when considering the glycerol oxidehydration reaction. The hierarchical zeolites is a promising route for obtaining catalysts that are more efficient to glycerol oxidehydration reaction.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CHAVES, THIAGO F.; PASSOS, ALINE R.; BRIOIS, VALERIE; MARTINS, LEANDRO; PULCINELLI, SANDRA H.; SANTILLI, CELSO V.; PEREZ-PARIENTE, JOAQUIN. Vanadosilicate with MWW zeolite structure synthesized from VCl3 by cooperative assembly of organic templates. Microporous and Mesoporous Materials, v. 279, p. 252-261, MAY 1 2019. (14/11952-5, 15/25850-2)