Dynamic modelling of a CO2 capture and purification unit for an oxy-coal-fired power plant

Chansomwong, Atchariya; Zanganeh, Kourosh E.; Shafeen, Ahmed; Douglas, Peter; Croiset, Eric; Ricardez‐Sandoval, Luis A.

doi:10.1016/j.ijggc.2013.12.025

Cited by 26 publications

(9 citation statements)

References 16 publications

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“…Several approaches have been proposed to reduce CO 2 emissions from large point sources such as power plants. These approaches include pre-combustion [4], oxy-fuel combustion [5] and post-combustion [6]; however, amine-based post-combustion CO 2 capture (PCC) is the most mature and viable technology available today.…”

Section: Introductionmentioning

confidence: 99%

Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking

Decardi‐Nelson

Liu

2022

Energies

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Several studies have reported the importance of optimally operating the absorption column in a post-combustion CO2 capture (PCC) plant. It has been demonstrated in our previous work how economic model predictive control (EMPC) has a great potential to improve the operation of the PCC plant. However, the use of a general economic objective such as maximizing the absorption efficiency of the column can cause EMPC to drive the state of the system close to the constraints. This may lead to solvent overcirculation and flooding, which are undesirable. In this work, we present an EMPC with zone tracking algorithm as an effective means to address this problem. The proposed control algorithm incorporates a zone tracking objective and an economic objective to form a multi-objective optimal control problem. To ensure that the zone tracking objective is achieved in the presence of model uncertainties and time-varying flue gas flow rate, we propose a method to modify the original target zone with a control invariant set. The zone modification method combines both ellipsoidal control invariant set techniques and a back-off strategy. The use of ellipsoidal control invariant sets ensure that the method is applicable to large scale systems such as the absorption column. We present several simulation case studies that demonstrate the effectiveness and applicability of the proposed control algorithm to the absorption column in a post-combustion CO2 capture plant.

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Section: Introductionmentioning

confidence: 99%

Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking

Decardi‐Nelson

Liu

2022

Energies

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“…CCS is a group of technologies comprised of post-, oxy-, and pre-combustion ,, that plays a prominent role in most integrated assessment model (IAM) pathways to achieve a least-cost transition to a low-carbon electricity system. − These technologies offer the potential to significantly mitigate CO 2 emissions associated with fossil fuel use, − , currently amounting to 36 Gt CO 2 /yr, while being able to provide the flexibility demanded by the electricity grid. ,,− …”

Section: Introductionmentioning

confidence: 99%

A Techno-Economic Analysis of a Novel Solvent-Based Oxycombustion CO₂ Capture Process

Cabral

Heldebrant

Dowell

2019

Ind. Eng. Chem. Res.

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The gas processing unit (GPU) has previously been identified as the least thermodynamically efficient element of an oxycombustion process. A marginal improvement of this unit operation can provide a greater decrease of the parasitic power to the oxycombustion process than an equivalent improvement in the air separation unit (ASU). Hence, capturing CO 2 from oxycombustion using an alternative method than the conventional cryogenic process has potential to reduce the parasitic power consumption of the GPU. In this work, the authors present an initial evaluation of a new process concept; a hybrid oxycombustion process that uses a solvent-based GPU to capture CO 2 from the flue gas. N-Ethyldiethanolamine (EDEA) is a tertiary alkanolamine that captures CO 2 by forming a zwitterionic ammonium alkylcarbonate ionic liquid in the absence of water as a cosolvent. The new solvent-based GPU proposed herein demonstrates a clear potential to improve the net power efficiency by 1%, a 9% CAPEX reduction, and up to 5% LCOE reduction of an oxycombustion process if the price of EDEA is below $270/kg. Both lower CAPEX and the potential of reduced LCOE demonstrates that alternative CO 2 capture methods for oxycombustion can be more economical.

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“…12 Postler et al, 13 for instance, concentrated on dynamic power plant processes using a 250 MW e oxy-fuel combustion model, making it possible to understand in detail the load change and main fuel trip conditions caused by a flue gas circulation fan. Chansomwong et al 14 used gPROMS to develop a dynamic model of the CO 2 compression and purification system in an oxy-fuel combustion power plant. The dynamic response characteristics of the system were studied according to three different kinds of disturbance: increases in the compressor outlet pressure gradient, step increases in the condensed CO 2 flow rate, and changes in the flue gas components.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling on the Mode Switching Strategy of a 35 MW_th Oxy-fuel Combustion Pilot Plant

et al. 2019

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Large-scale pilot studies of oxy-fuel combustion have demonstrated that it is a promising CO2 capture technology. In this study, steady-state and dynamic models of oxy-fuel combustion were developed using the Yingcheng 35 MWth oxy-fuel combustion pilot facility as a prototype. Using specific features of Aspen software, a customized drum and furnace radiation model was developed to make it easier to represent the real features of the 35 MWth facility. The mode switching process between air combustion and oxy-fuel combustion is focused on, in particular, using both a “step by step” and a “simultaneous” switching scheme. It is found that maintaining the gas flow in oxygen and recirculation flue at different slopes for different switching stages can be an effective switching strategy. “Simultaneous” switching produces a better and smoother dynamic response during the switching process and is more exergy-efficient. Together, these results can help to improve the operation of facilities and control system design.

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Dynamic modelling of a CO2 capture and purification unit for an oxy-coal-fired power plant

Cited by 26 publications

References 16 publications

Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking

Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking

A Techno-Economic Analysis of a Novel Solvent-Based Oxycombustion CO₂ Capture Process

Dynamic Modeling on the Mode Switching Strategy of a 35 MW_th Oxy-fuel Combustion Pilot Plant

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Dynamic modelling of a CO2 capture and purification unit for an oxy-coal-fired power plant

Cited by 26 publications

References 16 publications

Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking

Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking

A Techno-Economic Analysis of a Novel Solvent-Based Oxycombustion CO2 Capture Process

Dynamic Modeling on the Mode Switching Strategy of a 35 MWth Oxy-fuel Combustion Pilot Plant

Contact Info

Product

Resources

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A Techno-Economic Analysis of a Novel Solvent-Based Oxycombustion CO₂ Capture Process

Dynamic Modeling on the Mode Switching Strategy of a 35 MW_th Oxy-fuel Combustion Pilot Plant