Improved catalytic performance of hierarchical ZSM-5 synthesized by desilication with surfactants
Articolo
Data di Pubblicazione:
2013
Abstract:
Hierarchical ZSM-5 zeolites were synthesized by alkaline desilication and a surfactant induced
re-assembly. Contrary to the purely alkaline desilicated zeolites a strong increase in external surface area,
a narrow pore size distribution of 3–10 nm and a decreased Brönsted acidity could be achieved when
using CTAB as a surfactant throughout the alkaline treatment. The hierarchical pore system and the
decreased acidity lead to an improved catalyst lifetime in the methanol to hydrocarbon conversion. A
further improvement could be accomplished by increasing the surfactant concentration during the desilication
re-assembly preparation. Tailoring of mesopore size and specific surface area was achieved using
surfactants with different chain lengths.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Hierarchical ZSM-5; Mesoporous ZSM-5; Surfactant assisted desilication; Methanol to hydrocarbon; Improved catalytic lifetime
Elenco autori:
F. Schmidt; M. R. Lohe; B. Büchner; F. Giordanino; F. Bonino; S. Kaskel
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