Banca de QUALIFICAÇÃO: ADRIANO MARTINEZ BASSO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : ADRIANO MARTINEZ BASSO
DATE: 20/02/2020
TIME: 09:00
LOCAL: Auditório do NUPPRAR
TITLE:

Heterogenized complexes of Nickel-β-diimines in KIT-6 and SBA-15 of diferente morphologies: aplication in ethylene oligomerization.

KEY WORDS:

 

heterogenized complexes; β-diimines; oligomerization.

PAGES: 133
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SPECIALTY: Físico Química Inorgânica
SUMMARY:

ABSTRACT: 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 ao Programa - 2302898 - ELEDIR VITOR SOBRINHO
Externa à Instituição - KATIA BERNARDO GUSMÃO - UFRGS
Presidente - 1308577 - SIBELE BERENICE CASTELLA PERGHER