Process for abatement of nitrogen oxides in exhaust from gas tur

Details Process for abatement of nitrogen oxides in exhaust from gas tur Process for abatement of nitrogen oxides in exhaust from gas tur

1996-08-22

1998-04-21

Freay, Charles G.

Power plants

Combustion products used as motive fluid

60 3906, 60 3912, 60 39463, 60 39465, 252373, 252700, F02C 726, F02B 4300

Patent

active

057406677

ABSTRACT:
Emissions of nitrogen oxides in exhaust from gas turbine systems are reduced, in accordance with the invention, by introducing, into the combustor, a supplementary gaseous stream comprising dihydrogen, carbon monoxide and carbon dioxide, and a stream of gaseous fuel and/or mixtures thereof, with a source of dioxygen to form a combustible gaseous mixture; combusting the mixture to produce heat and a combustion product stream; and driving a turbine with the combustion product stream to produce an exhaust stream and to generate mechanical power. Supplementary gaseous streams are, advantageously, formed by a process for hydroshifting dimethyl ether, i.e. formed by a process which comprises passing a feed stream which includes dimethyl ether and steam to a hydroshifting, reaction zone including an essentially alkali metal-free catalytic composition substantially composed of copper or nickel in elemental form. This process produces a hydroshifted product stream which is, advantageously, relatively rich in dihydrogen, carbon monoxide, and carbon dioxide.

REFERENCES:
patent: 3779695 (1973-12-01), Chamberlain
patent: 4262482 (1981-04-01), Roffe et al.
patent: 4434613 (1984-03-01), Stahl
patent: 4498289 (1985-02-01), Osgerby
patent: 5498370 (1996-03-01), Bhattacharyya et al.
patent: 5626794 (1997-05-01), Bhattacharyya et al.

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