Open AccessTHE EFFECT OF HYDROGEN ON COKE REMOVAL FROM Ga/HZMS5 CATALYSTS
Author(s) -
Meiry Gláucia Freire Rodrigues,
P. Magnoux,
M. Guisnet,
Vasant R. Choudhary
Publication year - 1997
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/s0104-66321997000300008
Subject(s) - coke , gallium , hydrogen , chemistry , catalysis , molecule , inorganic chemistry , chemical engineering , metallurgy , organic chemistry , materials science , engineering
The presence of gallium on HZMS5 zeolites increases the rate of coke elimination in their regeneration in hydrogen. The gallium species should contribute to the hydrogenation of the coke molecules and the acid sites should favour their crackings. However, the location of the coke molecules (near the outer surface and near the gallium species) instead of their nature seems to be the determining parameter for their eliminatio