Banca de DEFESA: LECH WALESA OLIVEIRA SOARES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : LECH WALESA OLIVEIRA SOARES
DATA : 15/08/2019
HORA: 14:00
LOCAL: Auditório do NUPPRAR
TÍTULO:

DEVELOPMENT OF Pt-USY CATALYSTS TO IMPROVE CETANE NUMBER IN LOW QUALITY DIESEL FRACTIONS VIA SELECTIVE RING OPENING REACTION OF NAPHTHENIC COMPOUNDS

PALAVRAS-CHAVES:

Heterogeneous Catalysis, Pt-USY catalysts, Bifunctional catalysis, Naphthenic compounds, Decalin

PÁGINAS: 150
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Físico-Química
ESPECIALIDADE: Cinética Química e Catálise
RESUMO:

A challenging hot topic faced by the oil refinery industry is the upgrading of low-quality distillate fractions, such as LCO, in order to meet current quality standards for diesel fuels. Thereof, an auspicious technological alternative entails the complete saturation of the aromatic structures followed by the selective cleavage of endocyclic C-C bonds in the formed naphthenic rings (selective ring opening or SRO). This work reports the influence of metal incorporation method in bifunctional Pt-USY catalysts with the aim of maximizing the dispersion at relatively high metal loadings as a means of improving their performance for the SRO of decalin as a model feed. A Pt-USY catalyst displaying low density of Brønsted acid sites and nearly monoatomic Pt dispersion (98%) at 4.9 wt% loading was prepared at optimized preparation conditions. This catalyst exhibited an outstanding performance in the SRO of decalin, giving a maximum combined yield to selective ring opening products (ROP: C 10 – alkylcycloalkanes + OCD: C 10 -alkanes) as high as 50% with a high proportion of the so-called open chain decanes (OCD) bearing the highest cetane. High (hydro) thermal stability and secondary mesoporosity of the Pt-USY catalysts make these systems highly prospective for upgrading low-quality distillate feeds.

MEMBROS DA BANCA:
Presidente - 1308577 - SIBELE BERENICE CASTELLA PERGHER
Interno - 350509 - ANTONIO SOUZA DE ARAUJO
Externo ao Programa - 2302898 - ELEDIR VITOR SOBRINHO
Externo à Instituição - FABIO GARCIA PENHA - IFRN
Externo à Instituição - LUIZ ANTÔNIO MAGALHÃES PONTES - UFBA