Post-combustion carbon dioxide capture via 6FDA/BPDA-DAM hollow fiber membranes at sub-ambient temperatures

Liu, Lu; Qiu, Wulin; Sanders, Edgar S.; Ma, Canghai; Koros, William J.

doi:10.1016/j.memsci.2016.03.027

Cited by 48 publications

(18 citation statements)

References 18 publications

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“…Polymeric defect-free asymmetric hollow fiber membranes have been used in large-scale in industry [1,2]. Defect-free polymeric hollow fibers can be used as membranes [6,10,[20][21][22][23][24][25][26], or as precursors for making carbon molecular sieve (CMS) hollow fibers [27][28][29][30], while porous hollow fibers can be used as highly efficient sorbents [31], for gas separation.…”

Section: Introductionmentioning

confidence: 99%

“…Several defect-free hollow fiber membranes have been successfully spun using 6FDA-based polymers [6,10,36,37,[39][40][41][42]. Hollow fiber with "nodular" skin morphology also has been successfully spun with Matrimid ® and 6FDA:BPDA-DAM(1:1) polymers [21,43], but no matter which type of fiber is spun, forming a tailorable spinning dope solution is critically important.…”

Section: Introductionmentioning

confidence: 99%

“…Optimization of dope composition is carried out using a ternary phase diagrams via the cloud point technique, and potentially spinnable dope compositions lie in the one-phase region, close to the binodal line [6,21]. Because of the complex optimization requirements, the "solvent" and "nonsolvent" may, in fact, comprise a mixture of components that allow control of evaporation rates, solvent power and other subtle properties.…”

Section: Introductionmentioning

confidence: 99%

“…shows a dope made with polymer that was synthesized using modified method in a large batch; the dope is clear, transparent, and homogeneous, with proper viscosity for spinning.Defect-free hollow fibers were successfully spun with the dope. Dope compositions and spinning conditions are same as previous work using a "good" polymer[21]. Typical morphologies of hollow fibers are shown inFig.…”

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confidence: 99%

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Effect of block versus random copolyimide structure on hollow fiber membrane spinnability

Qiu

Liu

Koros

2017

Journal of Membrane Science

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Soluble homopolyimides can be made into spinnable dopes; but copolyimides often present challenges. A 6FDA (4,4'-(Hexafluoroisopropylidene)diphthalic anhydride)-based copolyimide was used to illustrate these challenges when forming both defect-free and "nodular" skinned fibers. This copolyimide is soluble in strong solvents; but when combined in proportions with nonsolvents to allow forming an asymmetric structure, a gel, rather than a flowable dope solution can occur in some cases, making fiber spinning impossible. Analysis of problems and solution are presented to show how varied copolymer chemical structures affect dope formation. Studies were extended to other 6FDA-based copolyimides to show the generality of the problem and solution to the problem. We found a random copolyimide that forms a soluble spinnable dope becomes problematic when a block copolyimide with sufficient insoluble chain segments is present. Branching in copolyimide, impurity, and excessive molecular weight also affect dope formation, but to a less drastic degree.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of block versus random copolyimide structure on hollow fiber membrane spinnability

Qiu

Liu

Koros

2017

Journal of Membrane Science

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“…The pre-combustion capture refers to capturing CO 2 generated as an undesired co-product of a conversion process [49][50][51][52][53][54]. In the pre-combustion capture, fuel from the power plant is reacted with oxygen to generate a syngas mixture, which is carried out in the gasification step [55][56][57][58][59][60].…”

Section: Pre-combustionmentioning

confidence: 99%

The Potential of CO2 Capture and Storage Technology in South Africa’s Coal-Fired Thermal Power Plants

Yoro

Sekoai

2016

Environments

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Abstract:The global atmospheric concentration of anthropogenic gases, such as carbon dioxide, has increased substantially over the past few decades due to the high level of industrialization and urbanization that is occurring in developing countries, like South Africa. This has escalated the challenges of global warming. In South Africa, carbon capture and storage (CCS) from coal-fired power plants is attracting increasing attention as an alternative approach towards the mitigation of carbon dioxide emission. Therefore, innovative strategies and process optimization of CCS systems is essential in order to improve the process efficiency of this technology in South Africa. This review assesses the potential of CCS as an alternative approach to reducing the amount CO 2 emitted from the South African coal-fired power plants. It examines the various CCS processes that could be used for capturing the emitted CO 2 . Finally, it proposes the use of new adsorbents that could be incorporated towards the improvement of CCS technology.

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Enhanced CO₂/CH₄ Separation Performance of a Mixed Matrix Membrane Based on Tailored MOF‐Polymer Formulations

et al. 2018

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Membrane‐based separations offer great potential for more sustainable and economical natural gas upgrading. Systematic studies of CO2/CH4 separation over a wide range of temperatures from 65 °C (338 K) to as low as −40 °C (233 K) reveals a favorable separation mechanism toward CO2 by incorporating Y‐fum‐fcu‐MOF as a filler in a 6FDA‐DAM polyimide membrane. Notably, the decrease of the temperature from 308 K down to 233 K affords an extremely high CO2/CH4 selectivity (≈130) for the hybrid Y‐fum‐fcu‐MOF/6FDA‐DAM membrane, about four‐fold enhancement, with an associated CO2 permeability above 1000 barrers. At subambient temperatures, the pronounced CO2/CH4 diffusion selectivity dominates the high permeation selectivity, and the enhanced CO2 solubility promotes high CO2 permeability. The differences in adsorption enthalpy and activation enthalpy for diffusion between CO2 and CH4 produce the observed favorable CO2 permeation versus CH4. Insights into opportunities for using mixed‐matrix membrane‐based natural gas separations at extreme conditions are provided.

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Post-combustion carbon dioxide capture via 6FDA/BPDA-DAM hollow fiber membranes at sub-ambient temperatures

Cited by 48 publications

References 18 publications

Effect of block versus random copolyimide structure on hollow fiber membrane spinnability

Effect of block versus random copolyimide structure on hollow fiber membrane spinnability

The Potential of CO2 Capture and Storage Technology in South Africa’s Coal-Fired Thermal Power Plants

Enhanced CO₂/CH₄ Separation Performance of a Mixed Matrix Membrane Based on Tailored MOF‐Polymer Formulations

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Post-combustion carbon dioxide capture via 6FDA/BPDA-DAM hollow fiber membranes at sub-ambient temperatures

Cited by 48 publications

References 18 publications

Effect of block versus random copolyimide structure on hollow fiber membrane spinnability

Effect of block versus random copolyimide structure on hollow fiber membrane spinnability

The Potential of CO2 Capture and Storage Technology in South Africa’s Coal-Fired Thermal Power Plants

Enhanced CO2/CH4 Separation Performance of a Mixed Matrix Membrane Based on Tailored MOF‐Polymer Formulations

Contact Info

Product

Resources

About

Enhanced CO₂/CH₄ Separation Performance of a Mixed Matrix Membrane Based on Tailored MOF‐Polymer Formulations