Open AccessImpact of Pore Architecture on the Hydroconversion of Long Chain Alkanes over Micro and Mesoporous Catalysts
Author(s) -
Laura Vaugon,
Annie Finiels,
Thomas Cacciaguerra,
Vasile Hulea,
Anne Galarneau,
Cindy Aquino,
JeanPierre Dath,
Delphine Minoux,
Corine Gérardin,
François Fajula
Publication year - 2020
Publication title -
petroleum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.274
H-Index - 25
eISSN - 1555-6239
pISSN - 0965-5441
DOI - 10.1134/s0965544120040180
Subject(s) - mesoporous material , interconnectivity , catalysis , isomerization , materials science , porosity , amorphous solid , chemical engineering , acid strength , mcm 41 , zeolite , chemistry , organic chemistry , composite material , computer science , artificial intelligence , engineering
n -Hexadecane hydroconversion has been investigated in a series of bifunctionnal metal/acid catalysts featuring distinct well-defined pore architectures. The acidic components were prepared from dealuminated Y zeolites with Si/Al of 15 and 30 post treated in alkaline medium to generate ordered or non-ordered secondary networks of mesopores and from aluminated ordered mesoporous materials MCM-41, MCM-48, KIT-6 type materials and amorphous silica gel. Activity relates linearly to the strength and number of strong Brönsted acid sites, while selectivity, more precisely the yield in isomerization products, scales directly with the mesopore volume of the catalyst. The architecture of the mesoporous network, namely the ordering, interconnectivity, homogeneity of the mesopores, affects little catalytst behavior. Confrontation of catalytic data with diffusion measurements suggests the existence of an optimal mesopore size above which the number of strong Brönsted sites and the mesopore volume are the only parameters governing catalytic performance.