Computational investigation of solid sorbent carbon dioxide capture in a fluidized bed reactor

Chang, Jian; Zhang, Kai; Yang, Yongping; Wang, Baodong; Sun, Qi

doi:10.1016/j.powtec.2015.01.067

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…. The hydrodynamics and reaction behavior in a fluidized‐bed reactor for solid‐sorbent CO 2 capture were also investigated by using CFD with integration of CO 2 adsorption kinetics, and the researchers concluded that the velocities of gas and solid particles were not uniform in the reactor, and the CO 2 capture efficiency decreased with increasing percentage of CO 2 in the feed gas flow …”

Section: Theoretical Studiesmentioning

confidence: 99%

Polyethylenimine Applications in Carbon Dioxide Capture and Separation: From Theoretical Study to Experimental Work

et al. 2017

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Solid absorbents made with polyethylenimine (PEI), which is loaded on different porous substrates, are promising for postcombustion carbon dioxide capture. Herein, theoretical studies of polyamine applications, including PEI for carbon dioxide capture, are reviewed and the development of experimental work on carbon dioxide capture by using PEI summarized. The mechanisms of carbon dioxide capture are discussed at different reaction sites of the polyamines, such as primary, secondary, and tertiary amine groups. Experimental achievements in carbon dioxide capture are investigated by the incorporation of PEI with different support materials, such as mesoporous silica; nanotubes; membranes; and other materials, such as alumina, zeolite, resin, metal–organic frameworks, and glass fibers, through impregnation, grafting, and synthesis. The excellent carbon dioxide capture capacity and great stability of PEI‐impregnated nanomaterials highlight PEI as one of the greatest candidates for carbon dioxide capture from flue gas or air.

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Section: Theoretical Studiesmentioning

confidence: 99%

Polyethylenimine Applications in Carbon Dioxide Capture and Separation: From Theoretical Study to Experimental Work

et al. 2017

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“… In which represents the species (O 3 , O 2 , and air) mass concentration; D gn denotes the species molecular diffusivity; is an unknown term, namely the Reynolds mass flux, and is conventionally solved by the generalized Boussinesq’s postulation , where the assumed isotropic turbulent mass diffusivity, D gn,t , is calculated by using a experimental correlation or a constant turbulent Schmidt number Sc t . − Although such postulation has a simple expression and would be convenient to be applied, the use of isotropic D gn,t is unjustified since many researchers have revealed the anisotropic character of turbulent mass diffusion in FB. ,, In this light, the newly deduced Reynolds mass flux equation by Li et al , is adopted in this study as a closure equation for the turbulent mass transfer equation. …”

Section: Modelingmentioning

confidence: 99%

Anisotropic Turbulent Mass Transfer Model and Its Application to a Gas-Particle Bubbling Fluidized Bed

Liu

Zhu

2018

Ind. Eng. Chem. Res.

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The recently developed Reynolds mass flux (RMF) model is applied to simulate the reactive flow in a gas-particle bubbling fluidized bed (BFB). By using this model, the profiles of species/particles concentration and phase velocities are able to be predicted. The proposed model avoids the generalized Boussinesq’s postulation, thereby realizing the simulation of anisotropic mass transfer. The simulations are validated by experiments for ozone decomposition in a gas-particle bubbling fluidized bed and satisfactory agreement is found between them. Furthermore, the proposed model successfully characterizes the anisotropy of turbulent mass diffusivity in gas-particle BFB.

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“…14 The adsorption reactor plays a crucial role in CO 2 capture processes, and commonly used equipment includes fixed beds, moving beds, and fluidized beds. 15 At present, fluidized bed reactors is regarded as the optimal vessels for capturing CO 2 , 16 due to its advantages such as efficient gas-solid contact, superior heat and mass transfer performance, flexible operation, and low diffusion resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, post‐combustion CO 2 capture technology is considered the most advanced approach for reducing CO 2 emissions, and commonly used techniques include physical absorption, 11 chemical adsorption, 12 low‐temperature distillation, 13 and membrane technologies 14 . The adsorption reactor plays a crucial role in CO 2 capture processes, and commonly used equipment includes fixed beds, moving beds, and fluidized beds 15 . At present, fluidized bed reactors is regarded as the optimal vessels for capturing CO 2 , 16 due to its advantages such as efficient gas–solid contact, superior heat and mass transfer performance, flexible operation, and low diffusion resistance.…”

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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Computational investigation of solid sorbent carbon dioxide capture in a fluidized bed reactor

Cited by 14 publications

References 22 publications

Polyethylenimine Applications in Carbon Dioxide Capture and Separation: From Theoretical Study to Experimental Work

Polyethylenimine Applications in Carbon Dioxide Capture and Separation: From Theoretical Study to Experimental Work

Anisotropic Turbulent Mass Transfer Model and Its Application to a Gas-Particle Bubbling Fluidized Bed

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

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Computational investigation of solid sorbent carbon dioxide capture in a fluidized bed reactor

Cited by 14 publications

References 22 publications

Polyethylenimine Applications in Carbon Dioxide Capture and Separation: From Theoretical Study to Experimental Work

Polyethylenimine Applications in Carbon Dioxide Capture and Separation: From Theoretical Study to Experimental Work

Anisotropic Turbulent Mass Transfer Model and Its Application to a Gas-Particle Bubbling Fluidized Bed

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

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