Sensitivity analysis of CO2 capture process in cyclic fluidized-bed with regeneration of solid sorbent

Ju, Youngsan; Oh, Hyun Taek; Lee, Chang Ha

doi:10.1016/j.cej.2019.122291

Cited by 21 publications

(4 citation statements)

References 33 publications

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“…Yi et al 19 investigated the removal of CO 2 using potassium‐based dry adsorbents and further demonstrated the feasibility of dry solid adsorbents in CO 2 capture processes. Meanwhile, in an effort to enhance adsorption efficiency, Ju et al 20 analyzed the effects of adsorbent performance, operating conditions, and regeneration conditions on the efficiency of K 2 CO 3 in capturing CO 2 . Their study revealed that adsorbent performance had a greater impact on the capture process while adjusting operating conditions was easier to obtain reasonable energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on adsorption of CO₂ using K₂CO₃ particles in the bubbling fluidized bed

Wang,

Kuang,

Shao

et al. 2024

Asia-Pacific J Chem Eng

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With the increase of greenhouse gas emissions, global warming has become an urgent problem, and the use of solid adsorbents to capture CO2 gas in flue gas has attracted more and more attention. In this study, the process of CO2 capture by K2CO3 particles in the bubbling fluidized bed (BFB) is numerically simulated with Eulerian–Eulerian(E–E) two fluid model incorporating with the kinetic theory of granular flows (KTGF). The results are verified through a detailed comparison with experimental data from Ayobi et al. Furthermore, Regarding the fundamental factors influencing CO2 adsorption rate is revealed, diminishing the inlet gas superficial velocity and augmenting the particle size of the solid adsorbent both contribute to improve adsorption performance. Specifically, the adsorption rate increases from 76.7% to 81.7% at the gas superficial velocity reducing from 1.10 to 0.71 m/s, while the adsorption rate from 77.6% to 79.7% with the particle size ranging from 400 to 600 μm. Additionally, the study delves into an exploration of fluid dynamic characteristics pertaining to gas particles within the bubbling fluidized bed while systematically considering varied inlet gas superficial velocities and particle sizes.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation on adsorption of CO₂ using K₂CO₃ particles in the bubbling fluidized bed

Wang,

Kuang,

Shao

et al. 2024

Asia-Pacific J Chem Eng

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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%

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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“…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%

“…31,32 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. 33,34 In this study, the effect of ultra-micropores in activated carbon beads (spherical shape; particle size: 400−450 μm) on CO 2 adsorption is investigated by monitoring the adsorption capacity and rate and the effects on separation in a packed bed. To this end, the textural properties, especially the ultramicropore properties, of activated carbon beads prepared from a resin (denoted as RAC) are controlled by KOH activation using various KOH concentrations and activation temperatures.…”

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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Sensitivity analysis of CO2 capture process in cyclic fluidized-bed with regeneration of solid sorbent

Cited by 21 publications

References 33 publications

Numerical simulation on adsorption of CO₂ using K₂CO₃ particles in the bubbling fluidized bed

Numerical simulation on adsorption of CO₂ using K₂CO₃ particles in the bubbling fluidized bed

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

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Sensitivity analysis of CO2 capture process in cyclic fluidized-bed with regeneration of solid sorbent

Cited by 21 publications

References 33 publications

Numerical simulation on adsorption of CO2 using K2CO3 particles in the bubbling fluidized bed

Numerical simulation on adsorption of CO2 using K2CO3 particles in the bubbling fluidized bed

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

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Product

Resources

About

Numerical simulation on adsorption of CO₂ using K₂CO₃ particles in the bubbling fluidized bed

Numerical simulation on adsorption of CO₂ using K₂CO₃ particles in the bubbling fluidized bed

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