Power plants – Combustion products used as motive fluid
Patent
1996-07-26
2000-08-29
Thorpe, Timothy S.
Power plants
Combustion products used as motive fluid
60723, F23R 340, F02C 726
Patent
active
061090182
ABSTRACT:
This invention relates to an electrically-heated catalyst (EHC) and a start-up method of a gas turbine engine for combusting a hydrocarbonaceous fuel/oxygen-containing gas mixture using this electrically-heated catalyst. The catalytic structure is electrically heated to a predetermined temperature prior to start up of the turbine so as to reduce emissions during the start-up of the system. The EHC unit is a stacked or spirally wound layering of flat and corrugated thin metal foils which forms a plurality of axially-extending, longitudinal channels. The channels are preferably coated on one surface with a catalytic material, leaving the other surface free from the reaction to act as a heat sink, making the design an IHE (integral heat exchange) catalytic unit. The preferred embodiment of the EHC has electrodes outside of the fuel/oxygen-containing mixture stream, and uses electrical power having a predetermined voltage in the range of 100 to 200 volts to heat the unit. A method for using the EHC in the start-up of a gas turbine is also disclosed wherein an electrical power is applied to heat the EHC a predetermined temperature prior to the fuel/oxygen-containing mixture being introduced and may be left on for a certain period of time after the introduction of the fuel/oxygen-containing mixture. The EHC may be maintained at the desired predetermined temperature by modulating the applied voltage. The electrical power is terminated when any one of several conditions are met including when the heat of the catalytic reaction is sufficient to maintain the catalyst at its steady-state condition or when a certain period of time has elapsed.
REFERENCES:
patent: 3928961 (1975-12-01), Pfefferle
patent: 4112675 (1978-09-01), Pillsbury et al.
patent: 4202168 (1980-05-01), Acheson et al.
patent: 4202169 (1980-05-01), Acheson et al.
patent: 4598541 (1986-07-01), Mori et al.
patent: 5070694 (1991-12-01), Whittenberger
patent: 5232671 (1993-08-01), Brunson et al.
patent: 5250489 (1993-10-01), Dalla Betta et al.
patent: 5437099 (1995-08-01), Retallick et al.
patent: 5440872 (1995-08-01), Pfefferle
patent: 5456890 (1995-10-01), Tsai et al.
patent: 5518697 (1996-05-01), Dalla Betta et al.
patent: 5632961 (1997-05-01), Sheller
Dalla Betta Ralph A.
Magno Scott A.
Rostrup-Nielsen Thomas
Shoji Toru
Yee David K.
Catalytica Inc.
Jecminek Al A.
Kim Ted
Tanaka Kikinzoku Kogyo K.K.
Thorpe Timothy S.
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