TY - JOUR
T1 - Fluidization, spouting, and metal-organic CVD of platinum group metals on powders
AU - Vahlas, Constantin
AU - Juarez, Fernando
AU - Feurer, Roselyne
AU - Serp, Philippe
AU - Caussat, Brigitte
PY - 2002/7
Y1 - 2002/7
N2 - In the first part of this paper, processes used for the fluidization of particles in a CVD reactor are reviewed, then the concept of the spouted bed is introduced, and the possibility of using it in association with metal-organic (MO)CVD is discussed. In the second part, the particulars of the MOCVD of platinum group metals are recalled. Finally, the MOCVD of these metals in fluidized bed and spouted bed reactors is illustrated with results obtained during two research projects, one of which concerns the preparation of finely dispersed rhodium, platinum, and palladium-based catalysts by fluidized bed MOCVD, the other, the doping of NiCrAlY powders (a raw material for thermal barriers) with ruthenium by spouted bed MOCVD. Results on the morphology and purity of the deposits are presented, and the applicability of such techniques, either for industrial uses or for initial screening of dopants (nature and level), are discussed.
AB - In the first part of this paper, processes used for the fluidization of particles in a CVD reactor are reviewed, then the concept of the spouted bed is introduced, and the possibility of using it in association with metal-organic (MO)CVD is discussed. In the second part, the particulars of the MOCVD of platinum group metals are recalled. Finally, the MOCVD of these metals in fluidized bed and spouted bed reactors is illustrated with results obtained during two research projects, one of which concerns the preparation of finely dispersed rhodium, platinum, and palladium-based catalysts by fluidized bed MOCVD, the other, the doping of NiCrAlY powders (a raw material for thermal barriers) with ruthenium by spouted bed MOCVD. Results on the morphology and purity of the deposits are presented, and the applicability of such techniques, either for industrial uses or for initial screening of dopants (nature and level), are discussed.
KW - Catalysis
KW - Fluidization
KW - MOCVD
KW - Platinum group metals
KW - Spouting
UR - http://www.scopus.com/inward/record.url?scp=0037679207&partnerID=8YFLogxK
U2 - 10.1002/1521-3862(20020704)8:4<127::AID-CVDE127>3.0.CO;2-V
DO - 10.1002/1521-3862(20020704)8:4<127::AID-CVDE127>3.0.CO;2-V
M3 - Artículo de revisión
SN - 0948-1907
VL - 8
SP - 127
EP - 144
JO - Chemical Vapor Deposition
JF - Chemical Vapor Deposition
IS - 4
ER -