Banca de QUALIFICAÇÃO: DANIELE DA SILVA OLIVEIRA
Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.STUDENT : DANIELE DA SILVA OLIVEIRA
DATE: 30/07/2021
TIME: 08:00
LOCAL: VIDEO CONFERENCIA
TITLE:
DEVELOPMENT OF HIERARCHICAL ZEOLITIC CATALYST FOR BIOMASS CONVERSION REACTIONS
KEY WORDS:
Beta Zeolite, Hierarchization, Glycerol Dehydration.
PAGES: 100
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SPECIALTY: Físico Química Inorgânica
SUMMARY:
Beta zeolite has been frequently used in several reactions due to its interesting catalytic properties, such as: high specific area, shape selectivity, thermal stability, hydrothermal and acidic sites. However, the size of their micropores can hinder the diffusion of bulky molecules. An alternative to solve this limitation is to generate mesopores in the zeolite. Therefore, the objective of this work was to generate mesopores in Beta zeolite in order to obtain a hierarchical zeolite structure by an economical and easy method, and to evaluate its catalytic activity in the glycerol dehydration reaction in order to obtain higher value-added products. The hierarchical samples were obtained by alkaline treatment with NH4OH, in the presence and absence of the surfactant cetyltrimethylammonium bromide (CTAB). The hierarchical samples without CTAB showed mesopores formation with wide pore size distribution. The samples hierarchized with CTAB exhibited controlled ordered mesopores. Such materials proved to be promising in the glycerol dehydration reaction, obtaining acetic acid (57.38%) and propanoic acid (69.58%) as products.
BANKING MEMBERS:
Externo à Instituição - ALEXANDER SACHSE
Externo ao Programa - 2302898 - ELEDIR VITOR SOBRINHO
Externa à Instituição - LINDIANE BIESEKI - UFRN
Presidente - 1308577 - SIBELE BERENICE CASTELLA PERGHER