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Intrazeolite nanocomposite catalysts: Co‐Mo Sulfides for Hydrodesulfurization
Author(s) -
Okamoto Yasuaki,
Katsuyama Hiromoto
Publication year - 1997
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690431328
Subject(s) - hydrodesulfurization , catalysis , chemistry , sulfide , inorganic chemistry , extended x ray absorption fine structure , nanocomposite , zeolite , organic chemistry , materials science , absorption spectroscopy , nanotechnology , physics , quantum mechanics
It was, for the first time, demonstrated by means of FTIR, EXAFS, XPS, and XRF techniques that thermally stable Co–Mo binary sulfide clusters were synthesized in NaY zeolite cavities using Co and Mo carbonyls as precursors. The hydrodesulfurization (HDS) and hydrogenation activities of the intrazeolite nanocomposite sulfide clusters were examined as a function of composition. It was found that the highest HDS activity was attained at Co/Mo ≃ 1 (2 Mo/super cage or 12 wt. % Mo) and that the Co sites of the clusters were responsible for the reactions. The composition of the catalytically active intrazeolite Co–Mo sulfide clusters was implied to be Co 2 Mo 2 S 6 . The present intrazeolite nanostructure approach strongly suggested that the Co–Mo binary sulfide formation played a prominent role in the catalytic synergy generation. Metal carbonyl techniques were used in the preparation of intrazeolite Fe–Mo binary sulfides.