Solvent-based post-combustion CO2 capture for power plants: A critical review and perspective on dynamic modelling, system identification, process control and flexible operation

Wu, Xiao; Wang, Meihong; Liao, Peizhi; Shen, Jiong; Li, Yiguo

doi:10.1016/j.apenergy.2019.113941

Cited by 112 publications

(57 citation statements)

References 119 publications

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“…The capture and separation of dilute CO 2 in an oxidant environment from the flue gas of a combustion system is called the post-combustion route (Zhang et al 2020a, b). Before CO 2 capture, the exhaust flue gas emissions go through denitrification and desulphurisation along with dust removal and cooling to prevent solvent degradation (Wu et al 2020). Then the flue gas containing mainly CO 2 , H 2 O and N 2 , is then fed counter-currently to the absorber that contains the solvent, as shown in Fig.…”

Section: Post-combustionmentioning

confidence: 99%

Recent advances in carbon capture storage and utilisation technologies: a review

et al. 2020

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Human activities have led to a massive increase in $$\hbox {CO}_{2}$$ CO 2 emissions as a primary greenhouse gas that is contributing to climate change with higher than $$1\,^{\circ }\hbox {C}$$ 1 ∘ C global warming than that of the pre-industrial level. We evaluate the three major technologies that are utilised for carbon capture: pre-combustion, post-combustion and oxyfuel combustion. We review the advances in carbon capture, storage and utilisation. We compare carbon uptake technologies with techniques of carbon dioxide separation. Monoethanolamine is the most common carbon sorbent; yet it requires a high regeneration energy of 3.5 GJ per tonne of $$\hbox {CO}_{2}$$ CO 2 . Alternatively, recent advances in sorbent technology reveal novel solvents such as a modulated amine blend with lower regeneration energy of 2.17 GJ per tonne of $$\hbox {CO}_{2}$$ CO 2 . Graphene-type materials show $$\hbox {CO}_{2}$$ CO 2 adsorption capacity of 0.07 mol/g, which is 10 times higher than that of specific types of activated carbon, zeolites and metal–organic frameworks. $$\hbox {CO}_{2}$$ CO 2 geosequestration provides an efficient and long-term strategy for storing the captured $$\hbox {CO}_{2}$$ CO 2 in geological formations with a global storage capacity factor at a Gt-scale within operational timescales. Regarding the utilisation route, currently, the gross global utilisation of $$\hbox {CO}_{2}$$ CO 2 is lower than 200 million tonnes per year, which is roughly negligible compared with the extent of global anthropogenic $$\hbox {CO}_{2}$$ CO 2 emissions, which is higher than 32,000 million tonnes per year. Herein, we review different $$\hbox {CO}_{2}$$ CO 2 utilisation methods such as direct routes, i.e. beverage carbonation, food packaging and oil recovery, chemical industries and fuels. Moreover, we investigated additional $$\hbox {CO}_{2}$$ CO 2 utilisation for base-load power generation, seasonal energy storage, and district cooling and cryogenic direct air $$\hbox {CO}_{2}$$ CO 2 capture using geothermal energy. Through bibliometric mapping, we identified the research gap in the literature within this field which requires future investigations, for instance, designing new and stable ionic liquids, pore size and selectivity of metal–organic frameworks and enhancing the adsorption capacity of novel solvents. Moreover, areas such as techno-economic evaluation of novel solvents, process design and dynamic simulation require further effort as well as research and development before pilot- and commercial-scale trials.

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Section: Post-combustionmentioning

confidence: 99%

Recent advances in carbon capture storage and utilisation technologies: a review

et al. 2020

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“…Hence the state parameters of steam in the outlet separator can be used to replace the fluid parameter ( , ) in Eqs. (3)(4). The dynamic mass ℎ and energy balance equations in the separator is given as…”

Section: Q K R mentioning

confidence: 99%

“…It has been suggested to develop an effective CO 2 emission abatement strategy for large stationary source. With a strong motivation for the development and deployment of new carbon emission reduction technology, MEA-based post-combustion carbon capture (PCC) process is proven to be the most mature and economically appealing option [3]. It can be easily installed as an end-of-pipe solution with minimum modifications to the existing power plant configurations.…”

Section: Introductionmentioning

confidence: 99%

“…The heat is provided by extracted steam from crossover pipe between the intermediate and low-pressure steam turbine. For a CFPP, it has been estimated that PCC process at end-of-pipe will reduce electricity output by around 15%, which is a major reason that limits worldwide commercial deployment of PCC technology [3]. The energy penalty would be even higher if the PCC process is not operated optimally.…”

Section: Introductionmentioning

confidence: 99%

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Flexible operation of large-scale coal-fired power plant integrated with solvent-based post-combustion CO2 capture based on neural network inverse control

Liao

et al. 2020

International Journal of Greenhouse Gas Control

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Post-combustion carbon capture (PCC) with chemical absorption has strong interactions with coal-fired power plant (CFPP). It is necessary to investigate dynamic characteristics of the integrated CFPP-PCC system to gain knowledge for flexible operation. It has been demonstrated that the integrated system exhibits large time inertial and this will incur additional challenge for controller design. Conventional PID controller cannot effectively control CFPP-PCC process. To overcome these barriers, this paper presents an improved neural network inverse control (NNIC) which can quickly operate the integrated system and handle with large time constant. Neural network (NN) is used to approximate inverse dynamic relationships of integrated CFPP-PCC system. The NN inverse model uses setpoints as model inputs and gets predictions of manipulated variables. The predicted manipulated variables are then introduced as feed-forward signals. In order to eliminate steady-state bias and to operate the integrated CFPP-PCC under different working conditions, improvements have been achieved with the addition of PID compensator. The improved NNIC is evaluated in a large-scale supercritical CFPP-PCC plant which is implemented in gCCS toolkit. Case studies are carried out considering variations in power setpoint and capture level setpoint. Simulation results reveal that proposed NNIC can track setpoints quickly and exhibit satisfactory control performances.

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“…In recent years, many scholars have conducted research on the hybrid power generation technology of the solar generation system, CO 2 capture, and fossil fuel units [8]. To make post-combustion CO 2 capture (PCC) more suitable for coal-fired power plants, growing interest has been directed to the flexible operation of PCC [9]. The resource utilization of captured CO 2 as a carbon source for the production of energy storage media offers a technological solution for overcoming CO 2 emissions [10].…”

Section: Introductionmentioning

confidence: 99%

Study on the Coupling Effect of a Solar-Coal Unit Thermodynamic System with Carbon Capture

et al. 2020

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Based on the structural theory of thermo-economics, a 600 MW unit was taken as an example. An integration system which uses fuel gas heat and solar energy as a heat source for post-combustion carbon capture was proposed. The physical structure sketch and productive structure sketch were drawn and a thermo-economics model and cost model based on the definition of fuel-product were established. The production relation between units was analyzed, and the composition and distribution of the exergy cost and thermo-economic cost of each unit were studied. Additionally, the influence of the fuel price and equipment investment cost of the thermo-economic cost for each product was studied. The results showed that the main factors affecting the unit cost are the fuel exergy cost, component exergy efficiency, and irreversible exergy cost of each unit, and the main factors affecting the thermo-economics cost are the specific irreversible exergy cost and investment exergy cost. The main factors affecting the thermal economics of solar energy collectors and low-pressure economizers are the invested exergy cost, negentropy exergy cost, and irreversible exergy cost of each unit.

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Solvent-based post-combustion CO2 capture for power plants: A critical review and perspective on dynamic modelling, system identification, process control and flexible operation

Cited by 112 publications

References 119 publications

Recent advances in carbon capture storage and utilisation technologies: a review

Recent advances in carbon capture storage and utilisation technologies: a review

Flexible operation of large-scale coal-fired power plant integrated with solvent-based post-combustion CO2 capture based on neural network inverse control

Study on the Coupling Effect of a Solar-Coal Unit Thermodynamic System with Carbon Capture

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