Low Emission Power Generation and Hydrocarbon Recovery Systems and Methods
OwnerChad Rasmussen, Richard A. Huntington +3inventors
InventorsChad Rasmussen, Richard A. Huntington, Dennis O'Dea, Franklin F. Mittricker, Frank Hershkowitz
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Abstract
Methods and systems for oxyfuel based low emission power generation in hydrocarbon recovery processes are provided. One system includes a plenum and is configured to encourage post-combustor conversion of gaseous components such that a desired chemical state is achieved. Another system includes a steam reformer for reforming a control fuel stream to generate a reformed control fuel stream characterized by an increase in hydrogen, as compared to the control fuel stream.
Claims88
An oxyfuel gas turbine system comprising:
- an oxygen stream;
- a carbon dioxide stream;
- a control fuel stream;
- a combustion unit configured to receive the oxygen stream, the carbon dioxide stream, and the control fuel stream, and combust the control fuel stream, the carbon dioxide stream, and the oxygen stream to produce a gaseous combustion stream having substantially carbon dioxide and water, wherein the gaseous combustion stream has a temperature of at least 1800 degrees Fahrenheit;
- a turbine configured to receive the gaseous combustion stream, expand the gaseous combustion stream, and exhaust the expanded gaseous combustion stream as a turbine discharge stream, wherein the turbine discharge stream has a temperature of at least 1200 degrees Fahrenheit;
- and
- a plenum in fluid communication with the turbine for receiving the turbine discharge stream, wherein the plenum is configured to provide a residence time during which at least one individual component of the turbine discharge stream reacts chemically towards equilibrium and substantially converts an intermediate product to an equilibrium product.
An oxyfuel gas turbine system comprising:
- a combustion unit configured to produce a gaseous combustion stream;
- a turbine configured to receive the gaseous combustion stream, expand the gaseous combustion stream, and exhaust the expanded gaseous combustion stream as a turbine discharge stream wherein the turbine discharge stream has a temperature of at least 1200 degrees Fahrenheit;
- and
- a steam reformer configured to receive the turbine discharge stream;
- extract heat from the turbine discharge stream;
- and transfer the heat into a reformer feed stream to generate a reformer product stream.
An method for use with an oxyfuel gas turbine system, the method comprising:
- providing an oxygen stream, a carbon dioxide stream, and a control fuel stream;
- combusting the oxygen stream, the carbon dioxide stream, and the control fuel stream to produce a gaseous combustion stream;
- expanding the gaseous combustion stream across a turbine to form an expanded gaseous combustion stream;
- and
- providing a residence time for the expanded gaseous combustion stream to reach substantial chemical equilibrium, wherein the residence time is provided by a plenum configured to retain the expanded gaseous combustion stream for the residence time.
An method for use with an oxyfuel gas turbine system, the method comprising:
- providing an oxygen stream, a carbon dioxide stream, a control fuel stream, and a reformed control fuel stream;
- combusting the oxygen stream, the carbon dioxide stream, and the reformed control fuel stream to produce a gaseous combustion stream having a temperature of at least 1800 degrees Fahrenheit;
- expanding the gaseous combustion stream across a turbine to form an expanded gaseous combustion stream;
- and
- reforming the control fuel stream to form the reformed control fuel stream using heat extracted from the expanded gaseous combustion stream, wherein the reformed control fuel stream is characterized by an increase in hydrogen as compared to the control fuel stream.
Dependencies are inferred from the claim text.