METHODS AND SYSTEMS FOR OPTIMIZING CARBON DIOXIDE SEQUESTRATION OPERATIONS
First Claim
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1. A method of controlling a mostly-CO2 effluent stream in a pipeline, comprising:
- using a controller to control at least one of the operating pressure and temperature of the mostly-CO2 effluent stream in order to maintain said effluent stream as a single-phase liquid or a supercritical fluid stream in the pipeline.
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Abstract
Methods and systems are provided for controlling operational parameters of a CO2 compression surface facility or pipeline in order to maintain a CO2 stream having impurities flowing in the pipeline in a liquid or supercritical phase. Sensors may be provided to sense whether the flow is single-phase or two-phase flow, and feedback provided to adjust the pressure and/or temperature at the pipeline inlet. The system is preferably optimized to limit power consumption and/or cost.
24 Citations
24 Claims
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1. A method of controlling a mostly-CO2 effluent stream in a pipeline, comprising:
using a controller to control at least one of the operating pressure and temperature of the mostly-CO2 effluent stream in order to maintain said effluent stream as a single-phase liquid or a supercritical fluid stream in the pipeline. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Method of designing system for compressing and transporting a mostly-CO2 effluent stream expected to be generated as a by-product of a power plant or other sources and intended for sequestration in an earth formation traversed by an injection well, comprising:
minimizing the sum of (i) a first cost function that estimates the contribution of amortized capital cost and operating costs for at least one compressor and associated surface facilities required to treat said mostly-CO2 effluent stream, and (ii) a second cost function that estimates the contribution of amortized cost and operating costs for a pipeline running between the power plant and the injection well, wherein said amortized cost for said pipeline is a function of a pipeline characteristics including a length of said pipeline, and ambient conditions associated with said pipeline, and said operating costs of said at least one compressor and associated surface facilities is a function of an amount of energy required to compress said mostly-CO2 effluent stream so that said mostly-CO2 effluent stream can be maintained as a single-phase liquid or supercritical phase stream throughout the pipeline. - View Dependent Claims (19, 20, 21, 22)
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23. A system for compressing and transporting a mostly-CO2 effluent stream generated as a by-product of a power plant or other sources and intended for sequestration in an earth formation traversed by an injection well, comprising:
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a pipeline running between the power plant and the injection well; a controllable compressor located at a power plant side of said pipeline, said controllable compressor receiving and compressing said mostly-CO2 effluent stream stream so that said mostly-CO2 effluent stream is maintained as a single-phase liquid or supercritical phase stream throughout said pipeline; a controller coupled to said controllable compressor; and at least one sensor located along or at an outlet of said pipeline, said at least one sensor sensing a state of said mostly-CO2 effluent stream along or at said outlet of said pipeline, and feeding an indication of said state back to said controller, wherein if said indication of said state of said mostly-CO2 effluent stream indicates two-phase flow, said controller causes said controllable compressor to increase an operating pressure to cause said mostly-CO2 effluent stream to return to single-phase flow. - View Dependent Claims (24)
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Specification