Open AccessEFFECT OF VANADIUM ON THE DEACTIVATION OF FCC CATALYSTS
Author(s) -
Rodolfo E. Roncolatto,
Yiu Lau Lam
Publication year - 1998
Publication title -
brazilian journal of chemical engineering/brazilian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.313
H-Index - 52
eISSN - 1678-4383
pISSN - 0104-6632
DOI - 10.1590/s0104-66321998000200002
Subject(s) - vanadium , zeolite , crystallinity , catalysis , materials science , chemical engineering , inorganic chemistry , chemistry , organic chemistry , composite material , engineering
This work provides concrete evidence that vanadium causes the destruction of the zeolite in the FCC catalysts by a mechanism of acid attack or solid-solid transformation, as well as additional dealumination of the zeolite framework in the presence of steam and at high temperature. While these effects resulted in the reduction in crystallinity (zeolite Y content), specific area and unit cell size of the Y zeolite as the amount of vanadium in the catalysts increased, the reduction in activity was the most pronounced. The differences in these behaviors were interpreted and the model can be used for better catalyst formulation or screening