PURPOSE: To obtain high activity and high durability of combustion catalyst for gas turbine by arranging a honeycomb catalyst body contg. Pd to the forestage side where air-fuel mixture contacts with the catalyst body and honeycomb catalyst body contg. Pt to the backstage side.
CONSTITUTION: Catalyst body section in the passage of combustor is constructed in two stage structure comprising a honeycomb catalyst body 41 contg. Pd arranged to the fore stage where air-fuel mixture contacts with the catalyst body and honeycomb catalyst body 42 contg. Pt to the backstage side, respectively. The honeycomb catalyst body 41 comprises honeycomb heat resistant carrier 1, covering layer 2 of γ-alumina provided on the carrier 1, and catalyst metal particles 3' at least a part thereof being buried in the covering layer 2. The honeycomb catalyst body 42 contg. Pt arranged to the back stage side has the similar structure wherein the catalyst metal particles contain ≥4g Pt per 1,000cm3 particles and 10W20wt% La basing on the weight of γ-alumina in the covering layer.
FURUYA TOMIAKI
YAMANAKA CHIKAU
HIZUKA JIYUNJI
