Investigation of membrane wetting for CO2 capture by gas–liquid contactor based on ceramic membrane

Xue, Kaili; Fu, Hongming; Chen, Haiping; Zhang, Heng; Gao, Dan

doi:10.1016/j.seppur.2022.122309

Cited by 10 publications

(8 citation statements)

References 68 publications

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“…On the other hand, a higher gas flow rate provides more CO 2 for absorption, increases turbulence, and decreases the gas-side mass transfer resistance, contributing to an increase in the CO 2 absorption rate. However, this increase slows as the gas flow rate rises because the proportion of resistance from gas phase mass transfer decreases, and the process becomes dominated by liquid-film control 23 . The model's predictions agree with the experimental data, demonstrating its reliability and making it a valuable tool for probing other parameters.…”

Section: Resultsmentioning

confidence: 99%

“…Membrane wetting can occur for various reasons, including non-optimal material properties such as inadequate hydrophobicity, wrong pore size, low chemical resistance, and operational issues such as liquid evaporation and condensation 21 . As a result, wetting of membrane pores is a significant technical challenge for membrane contactors, as it can significantly increase mass transfer resistance 22 , 23 . While some efforts have been made to improve material hydrophobicity and increase permeability by using asymmetric membrane structures to reduce pore wetting, it is still an ongoing issue.…”

Section: Introductionmentioning

confidence: 99%

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Efficient CO2 absorption through wet and falling film membrane contactors: insights from modeling and simulation

Ghasem

2023

Sci Rep

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The release of excessive carbon dioxide (CO2) into the atmosphere poses potential threats to the well-being of various species on Earth as it contributes to global working. Therefore, it is necessary to implement appropriate actions to moderate CO2 emissions. A hollow fiber membrane contactor is an emerging technology that combines the advantages of separation processes and chemical absorptions. This study investigates the efficacy of wet and falling film membrane contactors (FFMC) in enhancing CO2 absorption in a monoethanolamine (MEA) aqueous solution. By analyzing factors such as membrane surface area, gas flow rate, liquid inlet flow rates, gas–liquid contact time, and solvent loading, we examine the CO2 absorption process in both contactors. Our results reveal a clear advantage of FFMC, achieving an impressive 85% CO2 removal efficiency compared to 60% with wet membranes. We employ COMSOL Multiphysics 6.1 simulation software and finite element analysis to validate our findings, demonstrating a close agreement between predicted and experimental values, with an average relative error of approximately 4.3%. These findings highlight the significant promise of FFMC for applications in CO2 capture.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient CO2 absorption through wet and falling film membrane contactors: insights from modeling and simulation

Ghasem

2023

Sci Rep

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“…On the other hand, a higher gas ow rate provides more CO 2 for absorption, increases turbulence, and decreases the gas-side mass transfer resistance, contributing to an increase in the CO 2 absorption rate. However, this increase slows as the gas ow rate rises because the proportion of resistance from gas phase mass transfer decreases, and the process becomes dominated by liquid-lm control 40 . The model's predictions are consistent with experimental data, demonstrating its reliability and making it a valuable tool for exploring challenging parameters.…”

Section: Resultsmentioning

confidence: 99%

Efficient CO 2 Absorption through Wet Membrane Falling Film Contactors: Insights from Modeling and Simulation

Ghasem

2023

Preprint

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This study investigates the use of wet membrane falling liquid film contactors to enhance the absorption of carbon dioxide (CO2) in a monoethanolamine (MEA) aqueous solution. Simulation and modeling analysis were performed to assess the effectiveness of the contactors in capturing CO2. The study analyzed the membrane surface area, flow rates, gas-liquid contact time, and solvent loading to investigate the CO2 absorption process in a falling film membrane contactor (FFMC). The results show that using FFMC significantly increases the CO2 capture rate compared to wet membranes. The study provides valuable insights into the use of contactors for CO2 capture and can serve as a basis for further research in this field. The study employed the finite element analysis method-based COMSOL Multiphysics 6.1 simulation software to conduct a numerical simulation of the CO2 mass transfer process in the FFMC system. The simulation model's accuracy was tested by comparing the simulated CO2 absorption efficiency and flux values in the MEA solution with experimental data. The results showed a favorable agreement between the predicted and experimental values, with an average relative error of approximately 4.3%. These findings suggest that the falling film membrane contactor approach holds significant potential for commercial applications in CO2 capture.

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“…In addition, gas-liquid systems require attention to the choice of absorbent. At present, amine solvents are the most studied CO 2 absorbents [23][24][25][26][27]. Although the carbon capture rate of amine solvents is high, the amine desorption process has the problems of high cost, high energy consumption, and low economic efficiency [28,29].…”

Section: Introductionmentioning

confidence: 99%

Carbon Capture from Flue Gas Based on the Combination of Non-Contact Hydrophobic Porous Ceramic Membrane and Bubbling Absorption

Luo¹,

Jin²,

Zhang³

2023

Journal of Renewable Materials

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A hybrid system combined with a non-contact membrane and bubbling absorption is proposed to capture CO 2 from flue gas. The non-contact way of membrane and liquid absorbent effectively avoids the reduction of gas diffusion flux through the membrane. High-porosity ceramic membranes in hybrid systems are used for gas-solid separation in fuel gas treatment. Due to the high content of H 2 O and cement dust in the flue gas of the cement plant, the membrane is hydrophobically modified by polytetrafluoroethylene (PTFE) to improve its anti-water, anti-fouling, and self-cleaning performances. The results show that the diffusion flux of CO 2 through the membrane is still higher than 7.0 × 10 −3 mol/m 2 s (20% CO 2 concentration) even under the influence of water and cement dust. In addition, slaked lime selected as the absorbent is cheap and the product after bubbling absorption is nano-scale light calcium carbonate. To sum up, the hybrid system combining non-contact membrane and bubbling absorption is expected to be used to capture carbon dioxide from the flue gas of the cement plant.

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Investigation of membrane wetting for CO2 capture by gas–liquid contactor based on ceramic membrane

Cited by 10 publications

References 68 publications

Efficient CO2 absorption through wet and falling film membrane contactors: insights from modeling and simulation

Efficient CO2 absorption through wet and falling film membrane contactors: insights from modeling and simulation

Efficient CO 2 Absorption through Wet Membrane Falling Film Contactors: Insights from Modeling and Simulation

Carbon Capture from Flue Gas Based on the Combination of Non-Contact Hydrophobic Porous Ceramic Membrane and Bubbling Absorption

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