Rate-based modeling and economic optimization of next-generation amine-based carbon capture plants

Tsay, Calvin; Pattison, Richard C.; Zhang, Yue; Rochelle, Gary T.; Bâldea, Michael

doi:10.1016/j.apenergy.2019.113379

Cited by 29 publications

(42 citation statements)

References 53 publications

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“…Motivated by the above, we recently presented a rate-based model and performed economic cost optimization for an AHA IL-based CO 2 capture process. 43 We used the pseudo-transient modeling and optimization framework proposed by Pattison and Baldea, 44 later extended to rate-based column models, 45 to solve and optimize the complex flowsheet model. This framework involves the reformulation of steady-state (algebraic) equations as differential-algebraic equations (DAEs), improving the convergence properties during simulation/optimization.…”

Section: ■ Introductionmentioning

confidence: 99%

Economic Optimization of Carbon Capture Processes Using Ionic Liquids: Toward Flexibility in Capture Rate and Feed Composition

Seo

Tsay

Edgar

et al. 2021

ACS Sustainable Chem. Eng.

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Aprotic heterocyclic anion ionic liquids (AHA ILs) have received significant recent attention as potential absorbents for next-generation carbon capture processes. In this paper, we describe a rate-based model of an AHA IL-based carbon capture process. We use the model to perform economic optimization, minimizing a total cost function (annual operating cost plus annualized capital cost). Process-level decisions, including equipment design and operating parameters, are considered simultaneously with the material-level decision of the CO2 reactive absorption enthalpy in the AHA IL being a tunable molecular parameter. We study how the optimal design changes with flexible flue gas compositions, with a focus on cases arising in the context of partial oxy-combustion. We also study the variation in the optimal design as the CO2 capture level changes. Flexibility in this regard is important as power plants increasingly need to account for time-varying power demand due to the market penetration of variable renewable energy sources such as wind and solar power.

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Section: ■ Introductionmentioning

confidence: 99%

Economic Optimization of Carbon Capture Processes Using Ionic Liquids: Toward Flexibility in Capture Rate and Feed Composition

Seo

Tsay

Edgar

et al. 2021

ACS Sustainable Chem. Eng.

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“…The core of the process consists of two absorption columns, an absorber and a desorber. In the former CO 2 is removed from the flue gas by means of an aqueous solution of piperazine, a broadly studied solvent capable of fast absorption kinetics, high resistance to chemical and thermal degradation, low energy requirements for regeneration and few volatility and corrosion issues [3,12,13,14,15]. In the desorber this solvent is regenerated by providing thermal power, thus releasing a CO 2 -rich gaseous product stream, which leaves the capture plant with a high water vapor content.…”

Section: Absorptionmentioning

confidence: 99%

Post-combustion CO2 Capture: A Comparison Between Commercially Ready Technologies

et al. 2021

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Retro-fitting of post-combustion CO 2 capture units to coal fired power plants is key to the transition to a net-zero CO 2 emission reality. Different separation technologies have been found suitable for CO 2 capture, but a more comprehensive approach is required to identify the most viable option among those commercially available. In this study we analyze the three most established technologies, namely absorption, adsorption and membrane separation, comparing both their exergetic efficiency and their total cost. This assessment provides an overview of the technical differences among the three capture routes and a realistic estimate of the expenditures associated with post-combustion CO2 capture, as of today.

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“…The stability of the PT model depends on the appropriate selection of fictitious time constants, τ, generally based on a natural hierarchy of dynamics in the process system. , PT modeling is a numerical technique that can expand the convergence basin when solving large-scale flowsheet models, including those with a high level of heat integration and/or material recycle. More detailed model reformulation techniques are described by Pattison and Baldea and Pattison et al The PT approach has been applied to the simulation and optimization of a wide array of process flowsheets, involving, e.g., periodic systems, multistream heat exchangers, dividing wall columns, , and amine-based carbon capture …”

Section: Pseudo-transient Modeling and Flowsheet Optimizationmentioning

confidence: 99%

“…For the mass flux equations, we implement a continuation parameter, a ̂ to treat source/sink terms where τ a is a pseudo-time constant that multiplies source/sink terms.…”

Section: Flowsheet Modeling Of Il-based Carbon-capture Processmentioning

confidence: 99%

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Rate-Based Process Optimization and Sensitivity Analysis for Ionic-Liquid-Based Post-Combustion Carbon Capture

Seo

Tsay

et al. 2020

ACS Sustainable Chem. Eng.

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Ionic liquids (ILs) are a promising class of absorbents for next-generation carbon-capture processes. In particular, aprotic heterocyclic anion ILs (AHAs) have received significant attention due to their ability to chemically absorb CO2 without a significant increase in viscosity. The development of process modeling and mathematical optimization approaches for AHA-based carbon-capture processes is essential for the evaluation of economic feasibility before industrial implementation. In this paper, we use a pseudo-transient modeling approach that enables the robust simulation and optimization of the large-scale process flowsheet. A Langmuir-type model that incorporates both the chemical and physical uptake of CO2 is used to describe the equilibrium absorption of CO2 by the IL. A rigorous rate-based model for the absorption column is employed to account for the effect of reversible chemical reactions on mass transfer. The models are then used to carry out economic optimization of a prototypical IL-based carbon-capture process. A sensitivity analysis of important IL properties is provided, revealing the key factors that affect IL choice. Finally, a comparison to an advanced amine-based process is briefly discussed.

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Rate-based modeling and economic optimization of next-generation amine-based carbon capture plants

Cited by 29 publications

References 53 publications

Economic Optimization of Carbon Capture Processes Using Ionic Liquids: Toward Flexibility in Capture Rate and Feed Composition

Economic Optimization of Carbon Capture Processes Using Ionic Liquids: Toward Flexibility in Capture Rate and Feed Composition

Post-combustion CO2 Capture: A Comparison Between Commercially Ready Technologies

Rate-Based Process Optimization and Sensitivity Analysis for Ionic-Liquid-Based Post-Combustion Carbon Capture

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