Structure and activity of tellurium-cerium oxide acrylonitrile catalysts

Journal Article · Sat May 01 00:00:00 EDT 1982 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(82)90128-2· OSTI ID:6804074

Bart, J C.J.; Giordano, N

Ammoxidation of propylene to acrylonitrile (ACN) was investigated over various silica-supported (Te,Ce)O catalysts at 360 and 440/sup 0/C. The binary oxide system used consists of a single nonstoichiometric fluorite-type phase ..cap alpha..-(Ce,Te)O/sub 2/ up to about 80 mole% TeO/sub 2/ and a tellurium-saturated solid solution ..beta..-(Ce,Te)O/sub 2/ at higher tellurium concentrations. The ACN yield varies almost linearly with the tellurium content of (Ce,Te)O/sub 2/. The ..beta..-(Ce,Te)O/sub 2/ phase is the most active component of the system (propylene conversion and ACN selectivity at 440 C of 76.7 and 74%, respectively) and is slightly more selective to ACN than ..cap alpha..-Te0/sub 2/. Tellurium reduces the overoxidation properties of cerium and selective oxidation occurs through Te(IV)-bonded oxygen.

• Research Organization: Montedison Research Lab., Milan, Italy
• OSTI ID: 6804074
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 75:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACRYLONITRILE
ALKENES
CATALYTIC EFFECTS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
MORPHOLOGY
NITRILES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PROPYLENE
RARE EARTH COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SURFACE PROPERTIES
SYNTHESIS
TELLURIUM COMPOUNDS
TELLURIUM OXIDES
YIELDS