Novel phases in the V-P-O catalytic system from oxovanadium hydrogenphosphate precursors
Book
·
OSTI ID:51591
- Univ. de Valencia (Spain)
Several biphasic VOPO{sub 4}/(VO){sub 2}P{sub 2}O{sub 7} redox partners seem to be active in the catalytic cycles involved in the mild oxidation of simple hydrocarbons to maleic anhydride. The present X-ray time resolved thermal-diffractometric study reveals the existence of a new anhydrous variety of the oxidized form, {omega}-VOPO{sub 4}, which may appear as an intermediate in the formation of the well known {beta}-VOPO{sub 4}. This new phase only remains well crystallized at relatively high temperatures, and when it is allowed to cool down in wet air VOPO{sub 4}{center_dot}2H{sub 2}O results. In turn, another well defined phase, VOPO{sub 4}{center_dot}1.58H{sub 2}O, can be recognized in the course of the hydration process.
- OSTI ID:
- 51591
- Report Number(s):
- CONF-940411--; ISBN 1-55899-246-4
- Country of Publication:
- United States
- Language:
- English
Similar Records
Molybdenum-doped V-P-O system. I. Preparation and characterization
New insights into VOPO[sub 4] phases through their hydration
Model vanadium-phosphorus-oxygen catalysts for the selective oxidation of C/sub 4/ hydrocarbons to maleic anhydride
Journal Article
·
Fri May 01 00:00:00 EDT 1987
· J. Solid State Chem.; (United States)
·
OSTI ID:6452903
New insights into VOPO[sub 4] phases through their hydration
Journal Article
·
Fri Jul 01 00:00:00 EDT 1994
· Journal of Catalysis; (United States)
·
OSTI ID:6859636
Model vanadium-phosphorus-oxygen catalysts for the selective oxidation of C/sub 4/ hydrocarbons to maleic anhydride
Technical Report
·
Mon Jun 01 00:00:00 EDT 1987
·
OSTI ID:6510309