On the fraction of CrII sites involved in the C2H4 polymerization on the Cr/SiO2 Phillips catalyst: a quantification by FTIR spectroscopy
Articolo
Data di Pubblicazione:
2006
Abstract:
An estimation of the fraction of Cr-II sites involved in the C2H4 polymerization on a Cr-II/SiO2 Phillips catalyst has been obtained by means of in situ alternated CO adsorption and C2H4 polymerization FTIR experiments: about 28% of the total surface sites react fast with C2H4, while a lower fraction, which depends upon the temperature reaction conditions, is more slowly involved, in agreement with XANES results.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
SUPPORTED CHROMIUM CATALYSTS; DIFFUSE-REFLECTANCE SPECTROSCOPY; ETHYLENE POLYMERIZATION; OLEFIN POLYMERIZATION; OXIDATION-STATES; CR(II) SITES; SILICA
Elenco autori:
GROPPO E; LAMBERTI C; CESANO F; ZECCHINA A
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