Optimizing heat integration in a flexible coal–natural gas power station with CO2 capture

Assessment of advanced solvent-based post-combustion CO2 capture processes using a bi-objective optimization technique

“…Figure shows a schematic of the facility considered in this work, which is the same as that treated in our earlier studies [14,19,20]. The facility consists of a coal-fired power station (CP), a gas-fired combined-cycle gas turbine (CCGT), and a post-combustion CO 2 capture system.…”

“…We assess the economic performance of the advanced processes and the MEA baseline process by modeling the processes within an engineering-economic optimization framework, considering a CO 2capture-enabled coal-natural gas power station. In this framework, which we first developed using MEA [14], we optimize the detailed heat integration design and operational profile of an auxiliary gaspowered CO 2 capture retrofit of a coal-fired power station. This type of configuration notably differs from retrofit configurations in which the energy used for CO 2 capture is taken parasitically from the coal plant.…”

“…In the 'full-physics' representation that was the focus in Kang et al [19], the CO 2 capture system was modeled using a rate-based Aspen Plus process simulation (or a statistical fit of Aspen Plus model output). In the 'simplified-capture' representation, which was employed in Kang et al [14] and Brodrick et al [21], the CO 2 capture system was represented using a variable for system capacity and constant parameters for a small number of performance specifications. In [19] we showed that the two modeling approaches provided similar high-level designs and objective function values for the cases considered, which suggests that adequate optimization results are obtainable at much less computational effort using the simplified-capture representation.…”

Thermoeconomic analysis and optimization of post‐combustion CO2 recovery unit utilizing absorption refrigeration system for a natural‐gas‐fired power plant

“…Likewise, economic parameters have been obtained for a postcombustion CO 2 capture from natural gas combined cycle [17]. Computational optimization has been previously employed to simultaneously determine the design and planned operating profile of a flexible coal-natural gas power station with CO 2 capture, under a CO 2 emission performance standard [20]. Analysis to reduce the energy penalty caused by carbon capture has been performed for carbon capture technologies using both current and near future parameters.…”

“…Nevertheless, once the process has been defined, the optimization of some internal variable can be necessary. Computational optimization has been previously employed to simultaneously determine the design and planned operating profile of a flexible coal-natural gas power station with CO 2 capture, under a CO 2 emission performance standard [20]. Two explicit nonlinear equations, one for technical objectives and another for techno-economic objectives were employed for optimal operation of solvent-based postcombustion carbon capture.…”