Power generation and CO₂capture with turbines in series

摘要

In various aspects, a method for producing electricity by operating two or more turbines in series is provided. The method can include introducing, at least part of, the exhaust from an upstream turbine into a combustion chamber of a downstream turbine. In one aspect, exhaust from the upstream turbine is introduced into the downstream turbine's combustion chamber via the downstream turbine's compression chamber.

主权项

1. A method for producing electricity, the method comprising:
introducing a first oxygen stream and a first combustion fuel stream into a combustion chamber of a first combustion turbine; generating electricity and a first exhaust gas by combusting the first combustion fuel stream in the first combustion turbine, the first exhaust gas having first exhaust concentration of O2 and a first exhaust concentration of CO2; introducing at least about 50 mol % of the O2 and at least about 50 mol % of the CO2 from the first exhaust gas into a combustion chamber of a second combustion turbine; introducing a second combustion fuel stream into the combustion chamber of the second combustion turbine; generating electricity and a second exhaust gas by combusting the second combustion fuel stream in the second combustion turbine, the second exhaust gas having second exhaust concentration of O2 and a second exhaust concentration of CO2, a ratio of the second exhaust concentration of CO2 to the first exhaust concentration of CO2 being at least about 1.3:1; and separating CO2 from at least a portion of the second exhaust gas, comprising:
introducing the at least a portion of the second exhaust gas into a cathode of a molten carbonate fuel cell;introducing an anode fuel stream comprising a reformable fuel into an anode of the molten carbonate fuel cell, an internal reforming element associated with the anode, or a combination thereof;generating electricity within the molten carbonate fuel cell; andgenerating an anode exhaust from the molten carbonate fuel cell comprising H2, CO, and CO2.