Premium
The Chemistry of the Oxychlorination Catalyst: an In Situ, Time‐Resolved XANES Study
Author(s) -
Lamberti Carlo,
Prestipino Carmelo,
Bonino Francesca,
Capello Luciana,
Bordiga Silvia,
Spoto Giuseppe,
Zecchina Adriano,
Diaz Moreno Sofia,
Cremaschi Barbara,
Garilli Marco,
Marsella Andrea,
Carmello Diego,
Vidotto Sandro,
Leofanti Giuseppe
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20020703)41:13<2341::aid-anie2341>3.0.co;2-p
The rate‐determining step of the ethylene oxychlorination reaction on CuCl 2 / γ ‐Al 2 O 3 catalyst could be identified by an in situ, time‐resolved XANES study. According to these data (see figure; E =photon energy) and the simultaneously determined catalyst activity, the rate‐determining step is the oxidation of CuCl. The dopant potassium chloride, added to the industrial catalysts, decreases the rate of the reduction step, which becomes the rate‐determining step for the KCl/CuCl 2 / γ ‐Al 2 O 3 catalyst.