Modelling of a tubular membrane contactor for pre-combustion CO2 capture using ionic liquids: Influence of the membrane configuration, absorbent properties and operation parameters

Dai, Zhongde; Usman, Muhammad Arslan; Hillestad, Magne; Deng, Liyuan

doi:10.1016/j.gee.2016.11.006

Cited by 32 publications

(21 citation statements)

References 57 publications

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“…In the earlier equation ῡ is the atomic diffusion volume. The validation of the correlation has been verified by many authors in previous studies …”

Section: Model Developmentsupporting

confidence: 63%

Mathematical modeling of CO₂ absorption with ionic liquids in a membrane contactor, study of absorption kinetics and influence of temperature

Sohaib

Gómez‐Coma

Albo

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND This work presents a comprehensive study of carbon dioxide (CO2) capture from CO2/N2 mixtures in a hollow fiber membrane contactor (HFMC). The absorbents considered were three different ionic liquids (ILs): 1‐ethyl‐3‐methylimidazolium acetate ([emim][OAc]), 1‐ethyl‐3‐methylimidazolium ethylsulfate ([emim][EtSO4]) and 1‐ethyl‐3‐methylimidazolium methyl sulfate ([emim][MeSO4]). A comprehensive two‐dimensional (2D) mathematical model for the transport of CO2 was developed and solved for steady‐state and pseudo steady‐state modes. For pseudo steady‐state mode, the 2D model was linked with a dynamic model applied on a tank from which the IL was recirculated into the shell side of the HFMC. RESULTS The model showed excellent agreement between the simulations and experimental data within the range of 2 to 5% standard deviation. Initially, overall mass transfer coefficients of 7.6 × 10−6 (m s−1), 1.6 × 10−6 (m s−1) and 3.7 × 10−6 (m s−1) were obtained for [emim][OAc], [emim][EtSO4] and [emim][MeSO4], respectively. Solubility, diffusivity and absorption efficiency of CO2 in ILs showed strong dependence on the temperature. Furthermore, concentration drop in the wetted portion of the membrane, effect of porosity, tortuosity, gas and absorbent flow rates were systematically studied. CONCLUSION Findings of both experimental and modeling work suggests that in spite of the difference of extraction efficiency, these ILs are potential absorbents for CO2 in membrane contactors. Moreover, the modeling approach was found very effective to predict the absorption behavior of CO2 in ILs and to study the wetting phenomena and parametric effects. © 2019 Society of Chemical Industry

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“…In the earlier equation ῡ is the atomic diffusion volume. The validation of the correlation has been verified by many authors in previous studies …”

Section: Model Developmentsupporting

confidence: 63%

Mathematical modeling of CO₂ absorption with ionic liquids in a membrane contactor, study of absorption kinetics and influence of temperature

Sohaib

Gómez‐Coma

Albo

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

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“…A smaller inner diameter will enhance the separation efficiency as shown in figure 11. The effect of changing fiber diameter has been studied and confirmed by Dai et al [2]. Fiber inner diameter was changed from 5 mm to 1mm which effectively enhanced separation efficiency.…”

Section: Effect Of Fiber Diameter and Module Lengthmentioning

confidence: 79%

“…−1 ) and ῡ are temperature, pressure, molar weight and atomic diffusion volumes, respectively. Equation 13 has been used in different studies to predict gas side diffusivity in membrane contactor operations [2,35,36].…”

Section: Tube Sidementioning

confidence: 99%

“…Anthropogenic increase in emission of carbon dioxide (CO 2 ), which is a major contributor to global warming and climate change, has driven world's attention towards CO 2 capture and storage. Due to the world's dependency on fossil fuels, CO 2 emission is increasing by 6 % every year [1][2][3]. Generally, three different carbon capture strategies are being studied to mitigate CO 2 emissions: oxyfuel-combustion, precombustion and post-combustion separation processes.…”

Section: Introductionmentioning

confidence: 99%

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CO2 capture in a hollow fiber membrane contactor coupled with ionic liquid: Influence of membrane wetting and process parameters

Sohaib

Gómez‐Coma

Albo

et al. 2020

Separation and Purification Technology

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The present work demonstrates the potential of coupling ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate ([emim][EtSO 4 ]) and hollow fiber membrane contactors for post-combustion CO 2 capture. CO 2 absorption experiments in counter-current configuration were carried out, followed by a comprehensive two-dimensional dynamic modeling based on steady state and pseudo-steady state operating modes. The model considers the level of wetting of porous hollow fibers. An overall mass transfer coefficient of 3.99 10 -5 m.s -1 and CO 2 flux 6.1 10 -5 mol.m -2 .s -1 were obtained for 100 ml.min -1 of gas flowing inside the fibers. The model predicted the effects of membrane wetting, porosity, tortuosity, module length, fiber inner diameter, gas and absorbent flow rates. Membrane wetting has a noteworthy effect on CO 2 capture efficiency. A smaller amount of wetting can cause a huge resistance in CO 2 transport through the membrane. The separation efficiency was enhanced by using membranes with high porosity and low tortuosity and decreased by enhancing the gas flow rate and absorbent flow rate reduction. CO 2 capture is enhanced by increasing module length and reduction of inner diameter of fibers.

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“…Reducing CO 2 emissions and concentration in the atmosphere has become one of today's most important challenges for humanity. To address this problem, it is clearly essential to make carbon resources renewable by using CO 2 capture and recycling approaches …”

Section: Introductionmentioning

confidence: 99%

Progress and Future Perspectives on Li(Na)–CO₂ Batteries

Cai

Chou

2018

Advanced Sustainable Systems

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Li(Na)-CO2 batteries are attracting significant research attention due to contemporary energy and environmental issues. Li(Na)-CO2 batteries make possible the utilization of CO2 and open up a new avenue for energy conver-sion and storage. Research on this system is currently in its infancy, and its development is still faced with many challenges in terms of high charge potential, weak rate capability, and poor cyclability. Moreover, the reaction mechanism in the battery is still unclear and hard to determine, due to the generation of carbon along with metal carbonates on the cathode. In this review, the authors present the fundamentals and the latest progress related to Li(Na)-CO2 research. Detailed discussions are provided on the electrochemical reactions on cathode, cathode materials, and electrolytes. Current challenges and future perspectives on Li(Na)-CO2 batteries are also proposed Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsCai, F., Hu, Z. & Chou, S. (2018 [17][18][19][20][21][22][23][24][25][26][27][28] As a new battery technology, metal-air batteries still face a number of problems, such as poor cycling performance, decomposition of electrolyte, high overpotentials etc. [29][30][31] It is well known that metal-air batteries with an open cell structure can generate power by the electrochemical reaction between metal and oxygen from the atmosphere. Using ambient air as the cathode for metal-air batteries, however, brings even more problematic molecules into the battery system. For example, moisture and CO 2 from the air easily react with the metal and discharge products to form insulating metal hydroxides and metal carbonates at the cathode, which can induce low energy efficiency and poor cycling stability. [32] Thus, most metal-air batteries in laboratories today run in a pure oxygen environment instead of ambient air.Although the concentration of CO 2 is low in ambient air (only 0.03 vol%), [33] CO 2 is known to be more soluble in organic electrolytes than O 2 (≈50 times higher than O 2 ), [34] resulting in the high possibility of CO 2 participation in battery reactions. Considering the influence of CO 2 on the operation of metalair batteries, researchers have focused on metal-CO 2 batteries that utilize an O 2 /CO 2 mixture or pure CO 2 as the reactant gas in the cathode, providing us with a new platform for electrical energy generation and CO 2 conversion and utilization. [35][36][37] At present, Li(Na)-CO 2 batteries have attracted most attention in relation to the development of primary metal-O 2 /CO 2 batteries to achieve rechargeable metal-CO 2 batteries.[38-50] The Li(Na)-CO 2 battery exhibits a high theoretical energy density of 1876 Wh kg −1 (1.13 kWh kg −1 for Na) based on the reaction of 4Li(Na) + 3CO 2 ↔ 2Li(Na) 2 CO 3 + C. [36,44] The operation of a rechargeable Li(Na)-CO 2 battery, however, is faced with the critical challenges of the poor round-trip efficiency and the decomposition of electrolyte caused by high charge overpotential, as well as o...

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Modelling of a tubular membrane contactor for pre-combustion CO2 capture using ionic liquids: Influence of the membrane configuration, absorbent properties and operation parameters

Cited by 32 publications

References 57 publications

Mathematical modeling of CO₂ absorption with ionic liquids in a membrane contactor, study of absorption kinetics and influence of temperature

Mathematical modeling of CO₂ absorption with ionic liquids in a membrane contactor, study of absorption kinetics and influence of temperature

CO2 capture in a hollow fiber membrane contactor coupled with ionic liquid: Influence of membrane wetting and process parameters

Progress and Future Perspectives on Li(Na)–CO₂ Batteries

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Modelling of a tubular membrane contactor for pre-combustion CO2 capture using ionic liquids: Influence of the membrane configuration, absorbent properties and operation parameters

Cited by 32 publications

References 57 publications

Mathematical modeling of CO2 absorption with ionic liquids in a membrane contactor, study of absorption kinetics and influence of temperature

Mathematical modeling of CO2 absorption with ionic liquids in a membrane contactor, study of absorption kinetics and influence of temperature

CO2 capture in a hollow fiber membrane contactor coupled with ionic liquid: Influence of membrane wetting and process parameters

Progress and Future Perspectives on Li(Na)–CO2 Batteries

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Product

Resources

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Mathematical modeling of CO₂ absorption with ionic liquids in a membrane contactor, study of absorption kinetics and influence of temperature

Mathematical modeling of CO₂ absorption with ionic liquids in a membrane contactor, study of absorption kinetics and influence of temperature

Progress and Future Perspectives on Li(Na)–CO₂ Batteries