10.1021/acs.cgd.6b01564.s001
Maeva Borel
Maeva
Borel
Mathias Dodin
Mathias
Dodin
T. Jean Daou
T. Jean
Daou
Nicolas Bats
Nicolas
Bats
Bogdan Harbuzaru
Bogdan
Harbuzaru
Joël Patarin
Joël
Patarin
SDA-Free Hydrothermal Synthesis of High-Silica Ultra-nanosized
Zeolite Y
American Chemical Society
2017
high-silica ultra-nanosized zeolite Y crystals display
synthesis protocol
High-Silica Ultra-nanosized Zeolite Y
hydrocracking processes
crystallization conditions
microsized counterparts
zeolite Y nanocrystals
textural properties
zeolite Y
SDA-Free Hydrothermal Synthesis
30 nm
S BET
gel composition
V micropore
physicochemical properties
template-free medium
aluminum ratio
silica source
2017-02-07 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/SDA-Free_Hydrothermal_Synthesis_of_High-Silica_Ultra-nanosized_Zeolite_Y/4659055
Despite
having been used in hydrocracking processes for decades,
zeolite Y is still nowadays the subject of intense research aiming
at improving its physicochemical properties. Here, and for the first
time, the synthesis of zeolite Y nanocrystals prepared in organic
template-free medium, featuring both extremely reduced dimensions
(mean diameter below 30 nm) and a high silicon to aluminum ratio (Si/Al
≈ 2.2), is reported. The singularity of the protocol lies in
the progressive adding of a silica source during synthesis combined
with the use of prolonged aging times. These high-silica ultra-nanosized
zeolite Y crystals display excellent textural properties (<i>V</i><sub>micropore</sub> = 0.33 cm<sup>3</sup>/g and <i>S</i><sub>BET</sub> = 830 m<sup>2</sup>/g), comparable to their
microsized counterparts. In this work, the extensive study of the
influence of various parameters (<i>i.e.</i>, gel composition,
aging time, and crystallization conditions) intended for the optimization
of the synthesis protocol is also presented.