Catalytic Oxidation by Transition Metal Ions in Zeolites
Abstract
The regular cavities of zeolites form a unique environment for carrying out both stoichiometric and catalytic oxidation reactions. Transition metal ions such as molybdenum and cobalt may be introduced into the zeolite, and, as well, the acidity may be varied. As a continuation of previous work on the oxidation of olefins over Mo-Y zeolites it was demonstrated using shape selective poisons that the catalytic reaction actually takes place in the interior of the zeolite, rather than on the external surface of the crystallites. The role of cobalt-bipyridine-terpyridine complexes in forming reversible oxygen adducts was demonstrated. Although these complexes in zeolites have potential for the separation of oxygen from air, their value in oxidation catalysis is doubtful because of the presence of water the ligands are oxidized. The acidity of Y-type zeolites may be remarkably enhanced by removing aluminum from the framework. Keywords: Zeolite; Oxidation catalysis; Molybdenum zeolite; Cobalt zeolite; Oxygen adduct; Epoxidation; Zeolite acidity; Trimethylphosphine oxidation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 15, 1988
- Accession Number
- ADA196256
Entities
People
- Jack H. Lunsford
Organizations
- Texas A&M University