Dynamic modeling of a dual fluidized-bed system with the circulation of dry sorbent for CO2 capture

Ju, Youngsan; Lee, Chang Ha

doi:10.1016/j.apenergy.2019.03.070

Cited by 30 publications

(8 citation statements)

References 47 publications

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“…The amine-based capture process is widely studied as a postcombustion capture process, and various process configurations are feasible to enhance the capture efficiency. , The demands to reduce the capture cost and to improve eco-friendliness drive the development of alternatives. One of the strong candidates is the cyclic capture process using chemical dry sorbents. , Three different Ca-based sorbents (natural CaCO 3 , natural dolomite, and synthetic CaO) have been evaluated for carbon capture from NGCC; since the sorbents are operated at a high CO 2 recycle temperature, the capacity and stability of sorbents and heat recovery have been investigated . Chemical absorption/adsorption for postcombustion carbon capture was evaluated with respect to the technoeconomic performance of NGCCs .…”

Section: Introductionmentioning

confidence: 99%

“…One of the strong candidates is the cyclic capture process using chemical dry sorbents. 10,11 Three different Ca-based sorbents (natural CaCO 3 , natural dolomite, and synthetic CaO) have been evaluated for carbon capture from NGCC; since the sorbents are operated at a high CO 2 recycle temperature, the capacity and stability of sorbents and heat recovery have been investigated. 12 Chemical absorption/adsorption for postcombustion carbon capture was evaluated with respect to the technoeconomic performance of NGCCs.…”

Section: Introductionmentioning

confidence: 99%

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Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Lee

Lee³

2021

ACS Omega

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The natural gas combined cycle (NGCC) is the most popular and efficient fossil fuel power plant; however, integrating a carbon capture system reduces its performance efficiency. The demand to reduce the carbon capture cost and improve eco-friendliness drives the development of alternatives. In this study, four alternative NGCC-based process schemes were designed: NGCC with amine carbon capture as a base configuration and NGCCs with three different chemical looping combustion (CLC) configurations. Detailed heat and material balances were evaluated for all four cases using the PRO/II simulation package. A comparative analysis of the gross and net power, plant efficiency, and carbon capture efficiency, which are imperative to optimizing the process configuration, was conducted for all of the proposed cases. All NGCC-CLC processes could produce higher net power than NGCC-MEA because the amine regenerator consumes a high amount of power in its operation. In the condition using an equal amount of natural gas supply, NGCC-CLC configurations using excess air could produce a net power of 510.1 MW with a plant efficiency of 44.35%. The excess air fed in both cases enabled the turbine to generate more power. NGCC-CLC using excess air with steam turbine integration has an investment cost of 132.9 $/net MWh, an operating cost of 56.7 $/net MWh year, and a levelized cost of electricity of 90.9 $/MWh. In addition, NGCC-CLC with excess air resulted in a carbon capture efficiency of 99.93% under 59.2 $/ton of CO 2 , which was higher than that of NGCC-MEA with a carbon efficiency of 95.1%. NGCC-CLC using excess air with steam turbine integration is considered as the most efficient process scheme for generating power from natural gas with regard to efficiency, cost, and environmental impact.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Lee

Lee³

2021

ACS Omega

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“…In addition to the textural properties, the particle size of adsorbents is another important parameter because powder-type adsorbents cause a large pressure drop . Pellet- or bead-type activated carbons are more feasible for practical applications in gas separation. , Furthermore, because the abrasion resistance and durability of particles can reduce powder generation during particle collision, bead-type activated carbons are more reliable for CO 2 capture processes, in which a fluidized bed is utilized to handle the massive throughput of CO 2 effluent gases. , …”

Section: Introductionmentioning

confidence: 99%

Role of Ultra-micropores in CO₂ Adsorption on Highly Durable Resin-Based Activated Carbon Beads by Potassium Hydroxide Activation

Jin

Lee

et al. 2021

Ind. Eng. Chem. Res.

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Resin-based activated carbon beads through KOH activation (KRACs; 400−450 μm) were studied to elucidate the role of ultra-micropores in CO 2 adsorption and separation. The improved textural properties resulted in an enhancing CO 2 adsorption of 55.4% (10.0 wt % at 303 K and 101.3 kPa), showing excellent cyclic stability. The change in CO 2 adsorption capacity correlated well with ultra-micropore properties. However, it was noteworthy that excessive developed ultra-micropores reduced the CO 2 adsorption rate. In the breakthrough experiments using CO 2 /N 2 and CO 2 /CH 4 mixtures, KRAC with the most developed ultra-micropores showed the highest CO 2 adsorption capacity, but the tailing was higher. As CO 2 concentration increased in the CO 2 /N 2 mixture, the difference in adsorption capacity from other KRACs was highly reduced. Furthermore, the breakthrough time of the KRAC in the CO 2 /CH 4 mixture was even shorter than other KRACs due to the preoccupied CH 4 despite the highest adsorption capacity of CO 2 . The ultra-micropores should be carefully controlled for separation efficiency, considering adsorbates in mixtures.

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“…In recent years, there have been numerous published works that have examined the simulation of heterogeneous gas-solid reaction systems in drop-tube or downflow reactors using mathematical models with different levels of complexity and accuracy [16][17][18][19][20][21][22][23][24]. Drop-tube reactors present a number of advantages compared to other types of reactors (i.e., risers), and are well known in the chemical and petrochemical industries.…”

Section: Introductionmentioning

confidence: 99%

“…Solids are spherical, with uniform sizes and temperatures. Change in the particle size during carbonation reaction is assumed negligible [16]. • Kinetic energy and work forces of the system are negligible in comparison with thermal energy due to the high temperature in the reactor [18].…”

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confidence: 99%

One-Dimensional Heterogeneous Reaction Model of a Drop-Tube Carbonator Reactor for Thermochemical Energy Storage Applications

et al. 2020

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Calcium looping systems constitute a promising candidate for thermochemical energy storage (TCES) applications, as evidenced by the constantly escalating scientific and industrial interest. However, the technologically feasible transition from the research scale towards industrial and highly competitive markets sets as a prerequisite the optimal design and operation of the process, especially corresponding reactors. The present study investigates for the first time the development of a detailed, one-dimensional mathematical model for the steady-state simulation of a novel drop-tube carbonator reactor as a core equipment unit in a concentrated solar power (CSP)-thermochemical energy storage integration plant. A validated kinetic mathematical model for a carbonation reaction (CaO(s) + CO2(g) → CaCO3(s)) focused on thermochemical energy storage conditions was developed and implemented for different material conditions. The fast gas–solid reaction kinetics conformed with the drop-tube reactor concept, as the latter is suitable for very fast reactions. Reaction kinetics were controlled by the reaction temperature. Varying state profiles were computed across the length of the reactor by using a mathematical model in which reactant conversions, the reaction rate, and the temperature and velocity of gas and solid phases provided crucial information on the carbonator’s performance, among other factors. Through process simulations, the model-based investigation approach revealed respective restrictions on a tailor-made reactor of 10 kWth, pointing out the necessity of detailed models as a provision for design and scale-up studies.

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Dynamic modeling of a dual fluidized-bed system with the circulation of dry sorbent for CO2 capture

Cited by 30 publications

References 47 publications

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Role of Ultra-micropores in CO₂ Adsorption on Highly Durable Resin-Based Activated Carbon Beads by Potassium Hydroxide Activation

One-Dimensional Heterogeneous Reaction Model of a Drop-Tube Carbonator Reactor for Thermochemical Energy Storage Applications

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Dynamic modeling of a dual fluidized-bed system with the circulation of dry sorbent for CO2 capture

Cited by 30 publications

References 47 publications

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Role of Ultra-micropores in CO2 Adsorption on Highly Durable Resin-Based Activated Carbon Beads by Potassium Hydroxide Activation

One-Dimensional Heterogeneous Reaction Model of a Drop-Tube Carbonator Reactor for Thermochemical Energy Storage Applications

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Product

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Role of Ultra-micropores in CO₂ Adsorption on Highly Durable Resin-Based Activated Carbon Beads by Potassium Hydroxide Activation