Banca de DEFESA: ADRIANO MARTINEZ BASSO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ADRIANO MARTINEZ BASSO
DATE: 25/09/2020
TIME: 09:00
LOCAL: Remotamente pelo google meet
TITLE:

Oligomerization of ethylene using Ni/β-diimine complexes heterogenized in mesoporous materials: Effect of morphology and structure.

KEY WORDS:

 

KIT-6; SBA-15; heterogenized complexes; β-diimines; oligomerization

PAGES: 149
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SPECIALTY: Físico Química Inorgânica
SUMMARY:

Mesoporous compounds of type SBA-15 with fiber, platelet, rod and enlarged platelet morphology and mesoporous type KIT-6 were covalently anchored to the β-diimine 2-phenylamine-4-phenylimine-2-pentene (L2) ligand. The enlarged platelet morphology SBA-15 was also anchored to the β-diimine 2-orthodisopropylphenylamine-4-orthodisopropylphenylimine-2-pentene ligand (L1). The hybrid materials formed were complexed with nickel. The catalytic precursors Ni-β-diimine-mesoporous were tested for heterogenized ethylene oligomerization. The materials were characterized by low angle XRD, thermogravimetric analysis, N2 sortometry, NMR-¹H, NMR-²⁹Si, elemental analysis, atomic absorption spectroscopy, scanning and transmission electron microscopy. The results showed that all complexes were more selective and less active. Among the SBA-15, the one with platelet morphology had the highest activity (12,10³ h^-1) maintaining the selectivity for a-C₄ above 90% for at least three catalytic cycles. Comparing the SBA-15 with the KIT-6, this one had better activity (6.0.10³ against 3.0.10³ h^-1). The selectivities for a-C₄ were practically equal (96% for SBA-15 and 94% for KIT-6), keeping these rates above 90% for at least three catalytic cycles. The L1 ligand had low activity (0.3.10³ h^-1 against 3.0.10³ h^-1 of the L2 ligand) and favored the formation of 59% polymers.

BANKING MEMBERS:
Externo à Instituição - CRISTIANO FAVERO
Externo ao Programa - 2302898 - ELEDIR VITOR SOBRINHO
Externo à Instituição - FABIO GARCIA PENHA - IFRN
Presidente - 1308577 - SIBELE BERENICE CASTELLA PERGHER
Interno - 2087667 - TIAGO PINHEIRO BRAGA