2017
DOI: 10.1115/1.4037323
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Process Analysis of Selective Exhaust Gas Recirculation for CO2 Capture in Natural Gas Combined Cycle Power Plants Using Amines

Abstract: Post-combustion CO2 capture from natural gas combined cycle (NGCC) power plants is challenging due to the large flow of flue gas with low CO2 content (~3-4%vol.) that needs to be processed in the capture stage. A number of alternatives have been proposed to solve this issue and reduce the costs of the associated CO2 capture plant. This work focuses on the selective exhaust gas recirculation (S-EGR) configuration, which uses a membrane to selectively recirculate CO2 back to the inlet of the compressor of the tu… Show more

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Cited by 10 publications
(2 citation statements)
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“…The process configuration required for high effective separation of CO 2 and CH 4 mixtures, which must be able to attain simultaneously high recovery and purity values for both gases, must include more than one membrane unit in order to achieve the imposed restrictions successfully. Different membrane network superstructures can be defined and screened by an optimization technique to identify the optimal process configuration, and several examples of this approach have been reported. ,,,, This approach can derive in the design of quite complex systems, with a high number of stages, such as processes with more than five stages , or the presence of several recirculation and by-pass streams. ,, Nevertheless, the application of innovative membranes with enhanced separation characteristics allows the design of much more simple process configurations, with just two stages with permeate connection in series and without recirculation or by-pass streams . The schematic diagram of the membrane system configuration developed in this work is shown in Figure .…”
Section: Modelingmentioning
confidence: 99%
“…The process configuration required for high effective separation of CO 2 and CH 4 mixtures, which must be able to attain simultaneously high recovery and purity values for both gases, must include more than one membrane unit in order to achieve the imposed restrictions successfully. Different membrane network superstructures can be defined and screened by an optimization technique to identify the optimal process configuration, and several examples of this approach have been reported. ,,,, This approach can derive in the design of quite complex systems, with a high number of stages, such as processes with more than five stages , or the presence of several recirculation and by-pass streams. ,, Nevertheless, the application of innovative membranes with enhanced separation characteristics allows the design of much more simple process configurations, with just two stages with permeate connection in series and without recirculation or by-pass streams . The schematic diagram of the membrane system configuration developed in this work is shown in Figure .…”
Section: Modelingmentioning
confidence: 99%
“…However, membrane separation requires a higher percentage of CO 2 in the inflow (over 20%), which is considerably higher than that of the flue gas composition (less than 10%) of natural gas building heating systems. Although flue gas recirculation is a possible solution [79,80], it may need considerable modifications in the existing heating systems that require further research. Adsorption technology has a lower performance compared to all of the above factors.…”
mentioning
confidence: 99%