ChemInform Abstract: Perovskite Catalysts: High-Surface Area Powders Synthesis, Monoliths Shaping and High-Temperature Applications

ChemInform ◽  
2010 ◽  
Vol 26 (50) ◽  
pp. no-no ◽  
Author(s):  
V. A. SADYKOV ◽  
L. A. ISUPOVA ◽  
S. F. TIKHOV ◽  
O. N. KIMKHAI
Keyword(s):  
High Temperature ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Perovskite Catalysts ◽  
Temperature Applications

Perovskite Catalysts: High-Surface Area Powders Synthesis, Monoliths Shaping and High-Temperature Applications

1994 ◽  
Vol 368 ◽  
Author(s):  
Vladislav A. Sadykov ◽  
L.A. Isupova ◽  
S.F. Tikhov ◽  
O.N. Kimkhai.
Keyword(s):  
High Temperature ◽  
High Activity ◽  
Sulphur Dioxide ◽  
Methane Conversion ◽  
Ammonia Oxidation ◽  
High Surface ◽  
High Surface Area ◽  
Honeycomb Structure ◽  
Perovskite Catalysts ◽  
Temperature Applications

ABSTRACTMonolith perovskite catalysts of honeycomb structure for high-temperature applications are elaborated. Problems of powdered perovskites synthesis by efficient plasmochemical and mechanochemical methods as related to real structure and reactivity of these compounds are discussed. Pilot testing in reactions of fuels combustion, ammonia oxidation, methane conversion and sulphur dioxide reduction proved high activity and stability of these catalysts.

Microemulsion-Based Synthesis of CeO2Powders with High Surface Area and High-Temperature Stabilities

Langmuir ◽  
2004 ◽  
Vol 20 (25) ◽  
pp. 11223-11233 ◽  
Author(s):  
Ali Bumajdad ◽  
Mohamed I. Zaki ◽  
Julian Eastoe ◽  
Lata Pasupulety
Keyword(s):  
High Temperature ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area

Hard Template Route for Synthesis of Mesoporous Spinel Type Oxides with Ordered Structure

2014 ◽  
Vol 886 ◽  
pp. 200-203
Author(s):  
Wei Hua Shen
Keyword(s):  
High Temperature ◽  
Surface Area ◽  
Spinel Phase ◽  
High Surface ◽  
High Surface Area ◽  
Spherical Particles ◽  
Ordered Structure ◽  
Hard Template ◽  
Spinel Type ◽  
Spinel Oxides

The binary mesoporous spinel oxides with high surface area have been synthesized by using KIT-6 and SBA-15 as hard templates and hydrated nitrated salts as precursors. Low temperature such as 500 °C is suitable for preparation of NiCo2O4with spinel phase. High temperature such as 800 °C is necessary for preparation of NiMn2O4, MnCo2O4, and (Co0.5Mn0.5)3O4with pure spinel phase. The prepared mesoporous spinel shows high surface area as 43-105 m2/g with pore volume as0.095-0.233 cm3/g. It is preferred to form mesoporous NiCo2O4with spherical particles.

Transmission Electron Microscopy Studies of Pd Encapsulation by Ceria-Zirconia Oxides

1998 ◽  
Vol 4 (S2) ◽  
pp. 724-725
Author(s):  
J. C. Jiang ◽  
X. Q. Pan ◽  
G. W. Graham ◽  
R. W. McCabe ◽  
J. Schwank
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Surface Area ◽  
High Speed ◽  
High Surface ◽  
Silicon Crystal ◽  
High Surface Area ◽  
Thermal Environments ◽  
Transmission Electron

High-temperature catalysts containing Pd supported on high-surface area ceria-zirconia are optimum materials for fuel economy when automotive engines operate under high speed or load conditions. A prerequisite for developing such thermally stable catalysts is to gain a good understanding of the thermal deactivation modes contributing to the aging and degradation of catalysts in harsh thermal environments. It was discovered by X-ray diffraction that upon hightemperature aging, Pd may sinter into large (about 10 nm diameter) particles and become encapsulated in the ceria-zirconia. To confirm this conclusion, a prototype high-temperature catalyst containing Pd supported on high-surface area ceria-zirconia, aged at temperature above 1100 °C is studied by transmission electron microscopy (TEM).The ceria-zirconia supported Pd (0.25 wt%) catalyst was aged at 1105 °C and calcined at 700 °C for 2 h. For TEM sample preparations, first of all, a large-size aggregate with diameter about 1 mm was selected and sandwiched between by two pieces of silicon crystal.

Synthesis of high surface area perovskite catalysts by non-conventional routes

1997 ◽  
Vol 33 (1-3) ◽  
pp. 361-369 ◽  
Author(s):  
A. González ◽  
E. Martínez Tamayo ◽  
A. Beltrán Porter ◽  
V. Cortés Corberán
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Perovskite Catalysts
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