Desublimation based separation of CO2 inside a cryogenic packed bed: Performance mapping with the spatiotemporal evolution of CO2 frost

Debnath, Biswajit; Mukherjee, Abhirup; Mullick, Aditi; Ghoshdastidar, Sourodip; Ganguly, Saibal; Kargupta, Kajari

doi:10.1016/j.cherd.2019.03.024

Cited by 10 publications

(15 citation statements)

References 22 publications

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“…Except for these calculations, the other gradient term in (3.2a-c) is determined using the isotropic central scheme as (Guo, Zheng & Shi 2011) As can be seen, our simulation results agree well with those from Debnath et al (2019), indicating the reliability of our developed LB model in simulating CO 2 desublimation.…”

Section: Discussionsupporting

confidence: 68%

“…Once the flue gas encounters the cooled packing, CO 2 desublimates to generate an SCL on the packing surface. Here, the flue gas is assumed to be quiescent, which depicts the growth of the SCL for a large exposure time of the flue gas with the packing grain (Debnath et al 2019). In this case, a mesh of size 640 × 640 is used.…”

Section: C1 Co 2 Desublimation Over a Single Packingmentioning

confidence: 99%

“…Meanwhile, the component CO 2 desublimates on the cooled surface of solid heat exchangers, which introduces two important physical processes: the evolution of channel structures, and the conjugate heat transfer between the solid and the gas phases. These two processes, in turn, can significantly affect the flue gas flow and the CO 2 desublimation rate (Debnath et al 2019). Therefore, CO 2 desublimation in the CCC process is a complex problem with fully coupled multiphysics.…”

Section: Introductionmentioning

confidence: 99%

“…The modelled CO 2 content at the outlet showed a promising agreement with experimental measurements. This 1-D pseudo-homogeneous model was modified further to consider the desublimation of CO 2 both on the gas-solid interface and in the gas area (Debnath et al 2019). The spatio-temporal evolution of an SCL in a cryogenic packed bed was simulated under different operation conditions.…”

Section: Introductionmentioning

confidence: 99%

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Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

et al. 2023

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Cryogenic carbon capture (CCC) can preferentially desublimate $\text {CO}_2$ out of the flue gas. A widespread application of CCC requires a comprehensive understanding of $\text {CO}_2$ desublimation properties. This is, however, highly challenging due to the multiphysics behind it. This study proposes a lattice Boltzmann (LB) model to study $\text {CO}_2$ desublimation on a cooled cylinder surface during CCC. In two-dimensional (2-D) simulations, various $\text {CO}_2$ desublimation and capture behaviours are produced in response to different operation conditions, namely, gas velocity (Péclet number $\textit {Pe}$ ) and cylinder temperature (subcooling degree $\Delta T_{sub}$ ). As $\textit {Pe}$ increases or $\Delta T_{sub}$ decreases, the desublimation rate gradually becomes insufficient compared with the $\text {CO}_2$ supply via convection/diffusion. Correspondingly, the desublimated solid $\text {CO}_2$ layer (SCL) transforms from a loose (i.e. cluster-like, dendritic or incomplete) structure to a dense one. Four desublimation regimes are thus classified as diffusion-controlled, joint-controlled, convection-controlled and desublimation-controlled regimes. The joint-controlled regime shows quantitatively a desirable $\text {CO}_2$ capture performance: fast desublimation rate, high capture capacity, and full cylinder utilization. Regime distributions are summarized on a $\textit {Pe}$ – $\Delta T_{sub}$ space to determine operation parameters for the joint-controlled regime. Moreover, three-dimensional simulations demonstrate four similar desublimation regimes, verifying the reliability of 2-D results. Under regimes with loose SCLs, however, the desublimation process shows an improved $\text {CO}_2$ capture performance in three dimensions. This is attributed to the enhanced availability of gas–solid interface and flow paths. This work develops a reliable LB model to study $\text {CO}_2$ desublimation, which can facilitate applications of CCC for mitigating climate change.

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Section: Discussionsupporting

confidence: 68%

Section: C1 Co 2 Desublimation Over a Single Packingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

et al. 2023

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“…He observed that the rate of desublimation of CO2 on a low-temperature surface is dependent on the thickness of the CO2 frost layer formed on the surface. Debnath et al 2019 proposed a desublimation-based 1D model for the separation of CO2 using cryogenic packed beds [Debnath et al 2019]. Wang et al 2020 experimentally studied the sublimation and desublimation of CO2 on cryogenic surfaces with the aid of visual images, while varying the concentration of CO2 against time.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of the Desublimation of Co2

Oyinloye

Gubba

Cojocaru³

et al. 2022

Proceeding of Proceedings of CONV-22: Int. Symp. On Convective Heat and Mass Transfer June 5 – 10, 2022, Turkey

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Desublimation of CO2 from a point source through direct contact with a cryogenic liquid is a promising approach to capture carbon. This study presents the results of a 3D numerical model of the desublimation process of CO2 onto a solid surface. Due to its high triple point pressure (~5.2 bar), CO2 converts to solid directly from the gas phase (i.e., desublimates) if cooled sufficiently at around atmospheric pressure. Desublimation phenomena on the surface has been modeled using a user-defined function (UDF) based on the diffusion boundary layer model implemented in CONVERGE. Preliminary work on the development of a 3D CO2 desublimation model is presented here with two different test cases: one with a single isothermal, solid, spherical surface; and the other with multiple solid isothermal spheres stacked vertically. The results show that the rate of desublimation is dependent on the number of spheres in the domain, the concentration of the point source, and the temperature of the spherical surface. The resulting decrease in the local molar concentration of CO2 between the surface of the static sphere and the immediate gas phase in the domain suggests desublimation. This was supported by the temperature difference at the same points in the domain. The numerical formulation of the desublimation model is validated analytically through the solid-vapor equations of state and the energy, mass, and species balance. The developed model will be used in future assessment of the desublimation-based cryogenic carbon capture system, post-experimental validation. NOMENCLATUREVc Cell volume (m 3 ) 𝑚̇ Desublimation mass rate (kg/s) 𝑦 𝑐𝑜𝑛𝑐 + Dimensionless concentration y + yplus S Source term (kg/m 3 /s) SE Energy Source term (kg/m 3 /s) Hc Cell Specific Enthalpy (J/kg)

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Cryogenic CO2 capture from oxy-combustion flue gas by a hybrid distillation + physical absorption process

De Guido

2023

Chemical Engineering Research and Design

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Desublimation based separation of CO2 inside a cryogenic packed bed: Performance mapping with the spatiotemporal evolution of CO2 frost

Cited by 10 publications

References 22 publications

Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

Numerical Modeling of the Desublimation of Co2

Cryogenic CO2 capture from oxy-combustion flue gas by a hybrid distillation + physical absorption process

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Desublimation based separation of CO2 inside a cryogenic packed bed: Performance mapping with the spatiotemporal evolution of CO2 frost

Cited by 10 publications

References 22 publications

Study of CO2 desublimation during cryogenic carbon capture using the lattice Boltzmann method

Study of CO2 desublimation during cryogenic carbon capture using the lattice Boltzmann method

Numerical Modeling of the Desublimation of Co2

Cryogenic CO2 capture from oxy-combustion flue gas by a hybrid distillation + physical absorption process

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Product

Resources

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Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method