Fluid-dynamic study on a multistage fluidized bed column for continuous CO2 capture via temperature swing adsorption

Zehetner, Egon; Schöny, Gerhard; Fuchs, Johannes; Pröll, Tobias; Hofbauer, Hermann

doi:10.1016/j.powtec.2016.11.065

Cited by 12 publications

(10 citation statements)

References 14 publications

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“…26,27 Comparison of typical pyrolysis processes suggested that a multistage fluidized bed process had its own advantages in treating coal powder to produce high-quality tar and syngas 28 and in capturing carbon dioxide with a temperature swing adsorption concept. [29][30][31] The obtained pressure drop in a three stage FBR was lower than in a single-stage FBR. 32 Thus, the appropriate design of a stage FBR will optimize the conversion efficiency and selectivity of the chemical reaction, as well as the superficial velocity of the reactant gas and catalyst solid particle, the volume fraction of the catalyst solid particle, gas turbulence, residence time, initial coke of catalyst, and the system temperature.…”

Section: Introductionmentioning

confidence: 78%

“…Comparison of typical pyrolysis processes suggested that a multistage fluidized bed process had its own advantages in treating coal powder to produce high‐quality tar and syngas and in capturing carbon dioxide with a temperature swing adsorption concept . The obtained pressure drop in a three stage FBR was lower than in a single‐stage FBR .…”

Section: Introductionmentioning

confidence: 99%

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Computational fluid dynamics simulation of system hydrodynamics in a riser of stage circulating fluidized bed reactor

Phupanit

Soanuch

Korkerd

et al. 2018

Asia-Pacific J Chem Eng

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The riser of conventional and stage circulating fluidized bed reactors were simulated using computational fluid dynamics. The objective was to examine the design parameter effects using a 23 statistical experimental design method. The results showed that number of reactor stages had the highest effect on the standard deviation of the solid volume fraction (SVF), the average SVF, and standard deviation of gas temperature in a horizontal direction. In addition, the reactor wall temperature had the highest effect on the average holding time of catalysts. Increasing the number of reactor stages could reduce the back‐mixing and increase the system turbulence. The average vertical and horizontal solid particle velocities in the reactor stage region were higher than in the other regions. At the reactor stage region, peaks in the gas temperature were observed. The advantages of a stage reactor were confirmed to be applied in all the operating condition cases, independent of the solid particle mass flux.

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Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics simulation of system hydrodynamics in a riser of stage circulating fluidized bed reactor

Phupanit

Soanuch

Korkerd

et al. 2018

Asia-Pacific J Chem Eng

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“…The staging of a fluidized bed with horizontal screens was initially introduced by Varma and it was shown experimentally to reduce the axial mixing of the emulsion and bubble phases in addition to limiting the formation and growth of large bubbles . This promising result prompted several studies combining the multistage fluidized bed with a counter-current adsorber ,,,,− where the adsorbent particles move downward through a series of bubbling fluidized bed stages while the gas is fed at the bottom serving as a fluidizing agent in the stages. Such an arrangement enables contacting fresher adsorbent particles (lower loading of CO 2 ) flowing downward with the decreasing CO 2 partial pressure as the gas stream rises through the bed (see the illustration in Figure b).…”

Section: Reactor Configurationsmentioning

confidence: 99%

“…Another important component in this counter-current configuration is that each stage has a down comer to allow the downward transfer of the adsorbent particles between the stages. Different down comer configurations were explored with the aim of maximizing the achievable solid flux through them . All these additional internal components will increase the cost of the multistage bed relative to a conventional single stage fluidized bed.…”

Section: Reactor Configurationsmentioning

confidence: 99%

Review on Reactor Configurations for Adsorption-Based CO₂ Capture

Dhoke

Zaabout

Cloete

et al. 2021

Ind. Eng. Chem. Res.

135

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Adsorption-based CO 2 capture has enjoyed considerable research attention in recent years. Most of the research efforts focused on sorbent development to reduce the energy penalty. However, the use of suitable gas−solid contacting systems is key for extracting the full potential from the sorbent to minimize operating and capital costs and accelerate the commercial deployment of the technology. This paper reviews several reactor configurations that were proposed for adsorptionbased CO 2 capture. The fundamental behavior of adsorption in different gas−solid contactors (fixed, fluidized, moving, or rotating beds) and regeneration under different modes (pressure, temperature, or combined swings) is discussed, highlighting the strengths and limitations of different combinations of gas−solid contactor and regeneration mode. In addition, the estimated energy duties in published studies and current technology readiness level of the different reactor configurations are reported. Other aspects, such as the reactor footprint, the operation strategy, suitability to retrofits, and the ability to operate under flexible loads are also discussed. In terms of future work, the key research need is a standardized techno-economic benchmarking study to calculate CO 2 avoidance costs for different adsorption technologies under standardized assumptions. Qualitatively, each technology presents several strengths and weaknesses that make it impossible to identify a clear optimal solution. Such a standardized quantitative comparison is therefore needed to focus on future technology development efforts.

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“…Basic research, such as gas‐solid hydrodynamics research and stability control for multi‐fluid beds, has always been very active . Besides, multi‐stage fluidized bed reactors have been applied in various fields, such as drying, adsorption, calcination, regeneration of catalyst, etc., and have become an important branch of fluidization . This review will mostly focus on the recent efforts made in both fundamental understanding and heterogeneous catalytic process development of multi‐stage fluidized beds at the research group of Prof. Fei Wei in FLOTU.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous catalysis in multi‐stage fluidized bed reactors: From fundamental study to industrial application

et al. 2019

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The multi-stage fluidized bed (MSFB) reactor with several stages connected in series prevents gas and solids back-mixing effectively and obtains the plug-flow reactor performance. Besides, different process steps can be accomplished in a single reactor by establishing different temperatures and/or concentrations in each stage. Therefore, multi-stage fluidized bed reactors are acknowledged as novel and flexible multi-phase flow reactors for heterogeneous catalytic processes, especially with the intermediates as the desired products. Typical process developments in the industry involve the methanol to aromatics (MTA), regeneration in fluid catalytic cracking (FCC), and hydrogenation of nitrobenzene to aniline. The purpose of this article is to provide a comprehensive review of the fundamental research as well as particular industrial applications on multi-stage fluidized bed reactors in the Fluidization Laboratory of Tsinghua University (FLOTU).

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Fluid-dynamic study on a multistage fluidized bed column for continuous CO2 capture via temperature swing adsorption

Cited by 12 publications

References 14 publications

Computational fluid dynamics simulation of system hydrodynamics in a riser of stage circulating fluidized bed reactor

Computational fluid dynamics simulation of system hydrodynamics in a riser of stage circulating fluidized bed reactor

Review on Reactor Configurations for Adsorption-Based CO₂ Capture

Heterogeneous catalysis in multi‐stage fluidized bed reactors: From fundamental study to industrial application

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Fluid-dynamic study on a multistage fluidized bed column for continuous CO2 capture via temperature swing adsorption

Cited by 12 publications

References 14 publications

Computational fluid dynamics simulation of system hydrodynamics in a riser of stage circulating fluidized bed reactor

Computational fluid dynamics simulation of system hydrodynamics in a riser of stage circulating fluidized bed reactor

Review on Reactor Configurations for Adsorption-Based CO2 Capture

Heterogeneous catalysis in multi‐stage fluidized bed reactors: From fundamental study to industrial application

Contact Info

Product

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Review on Reactor Configurations for Adsorption-Based CO₂ Capture