Using polypropylene and polytetrafluoroethylene membranes in a membrane contactor for CO2 absorption

deMontigny, David; Tontiwachwuthikul, Paitoon; Chakma, A.

doi:10.1016/j.memsci.2005.10.024

Cited by 206 publications

(101 citation statements)

References 38 publications

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“…In addition in ordinary equipment as towers operating problems such as flooding and channelizing can be problematic. Therefore, many researchers studies on using hollow fiber membranes as a new equipment to absorb organic materials, carbon dioxide, and other acidic gases [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Also In recent years effect of different parameters in separation process using hollow fibers have been studied [19][20][21][22][23].…”

Section: List Of Symbolsmentioning

confidence: 99%

New 3-dimensional CFD modeling of CO2 and H2S simultaneous stripping from water within PVDF hollow fiber membrane contactor

2015

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feed temperature, feed velocity, and solvent velocity is optimized according to synergistic effects. Simulation results show that, in the optimum operating conditions the removal percentage of H 2 S and CO 2 are 27 and 21 % respectively. List of symbolsI I-component (CO 2 and H 2 S) C 0 Inlet mixture concentration (mol/m 3 ) C Concentration (mol/m 3 ) C i-membrane Component i concentration in the membrane (mol/m 3 ) C i-shell Component i concentration in the shell (mol/ m 3 ) C i-tube Component i concentration in the tube (mol/ m 3 ) D Diffusion coefficient (m 2 /s) D i-membrane Diffusion coefficient of component i in the membrane (m 2 /s) D i-shell Diffusion coefficient of component i in the shell (m 2 /s) D i-tube Diffusion coefficient of component i in the tube (m 2 /s) F Body force (N) J i Diffusive flux of species i (mol/s) m Physical solubility (dimensionless) r Radial coordinate (m) r 1 Inner tube radius (m) r-2 Outer tube radius (m) r-3 Inner shell radius (m) R i Reaction rate of species i (mol/s) t Time (s) u Average velocity in the tube side (m/s) V Velocity vector (m/s) V z z Direction velocity in the contactor (m/s) V z-shell z Direction velocity in the shell (m/s) AbstractIn this paper a 3-dimensional modeling of simultaneous stripping of carbon dioxide (CO 2 ) and hydrogen sulfide (H 2 S) from water using hollow fiber membrane made of polyvinylidene fluoride is developed. The water, containing CO 2 and H 2 S enters to the membrane as feed. At the same time, pure nitrogen flow in the shell side of a shell and tube hollow fiber as the solvent. In the previous methods of modeling hollow fiber membranes just one of the membranes was modeled and the results expand to whole shell and tube system. In this research the whole hollow fiber shell and tube module is modeled to reduce the errors. Simulation results showed that increasing the velocity of solvent flow and decreasing the velocity of the feed are leads to increase in the system yield. However the effect of the feed velocity on the process is likely more than the influence of changing the velocity of the gaseous solvent. In addition H 2 S stripping has higher yield in comparison with CO 2 stripping. This model is compared to the previous modeling methods and shows that the new model is more accurate. Finally, the effect of feed temperature is studied using response surface method and the operating conditions of * Bahram Dabir Heat Mass Transfer 1 3 Greek symbols ∇ Gradient (dimensionless) ρ Density (kg/m 3 ) η Dynamic viscosity (m 2 /s) Subscripts in Inlet out Outlet V z-tube z Direction velocity in the tube (m/s) V inlet Inlet velocity to the contactor (m/s) z Axial distance (m)

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Section: List Of Symbolsmentioning

confidence: 99%

New 3-dimensional CFD modeling of CO2 and H2S simultaneous stripping from water within PVDF hollow fiber membrane contactor

2015

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“…This technique is only applicable to semi-crystalline polymers, and in addition to the mechanical stretching process, it requires several thermal post-treatments to promote crystallinity and avoid membrane shrinkage. [19] There are few studies in the literature on the fabrication of open-cell foams containing polymer/filler composites using leachable salts with PP [20] polymethylmetacrylate, polysulfone [2] Amine solution (AMP, MEA, MDEA) À Falk-Pedersen and Dannström [27] À Kim et al [28] NaOH solution, MEA solution À Matsumoto et al [29] MEA, AMP À deMontigny et al [30] Water, MEA À Khaisri et al [31] PP NaOH solution + Rangwala [32] Alkanolamine solution + Falk-Pedersen and Dannström [27] + Kumar et al [33] Amino acid salts (potassium taurate ) + Kumar et al [33] NaOH solution, MEA solution + Matsumoto et al [32] Propylene carbonate + Dindore et al [1] Water, MEA + Khaisri et al [31] MEA, AMP + deMontigny et al [30] Activated absorbent + Lu et al [34] PE NaOH solution, MEA solution + Matsumoto et al [29] MEA + Nishikawa et al [2] PVDF 5% MEA +5% TEA À Yeon et al [35] Water, MEA + Khaisri et al [31] PTFE, polytetrafluoroethylene; PP, polypropylene; PE, polyethylene; PVDF, polyvinylidene fluoride; MEA, monoethanolamine; AMP, 2-amino-2-methyl-l-propanol; MDEA; N-methyldiethanolamine; TEA, triethanolamine. [ 31] 82.2 -59.2 deMontigny et al [30] Maximum specific area (m 2 /m 3 ) 2855 1488 1340 Lee et al [36] 2752 -429 deMontigny et al [30] Cost (US $/m) 0.01 -23 deMontigny et al [30] 0.01 0.36 11.5 Khaisri et al…”

Section: Introductionmentioning

confidence: 99%

Highly hydrophobic microporous low‐density polyethylene hollow fiber membranes by melt‐extrusion coupled with salt‐leaching technique

Mosadegh-Sedghi

Rodrigue

Brisson

et al. 2013

Polymers for Advanced Techs

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*Microporous and highly hydrophobic low-density polyethylene (LDPE) hollow fiber membranes were successfully prepared via a solvent-free method, combining melt-extrusion, and salt-leaching techniques. NaCl particles with particle size of 5-10 mm were mixed with LDPE pellets to produce a blend of 35, 40, 50, 60, 65 and 68 wt% of salt. A microporous structure was produced by leaching the salt particles from the hollow fiber matrix via immersion in water at 60 C. The fabricated membranes were then characterized in terms of morphology, porosity and pore size distribution, surface roughness, and hydrophobicity, as well as mechanical properties. The remarkable increase in the water contact angles from 98 for LDPE hollow fibers fabricated without the addition of salt (blank sample) to 130 for membranes fabricated with initial salt content of 68 wt% is mainly attributed to the rough surface structure, comprising a large number of micropapillas produced by removing the imbedded salt crystals. The increase in surface roughness and porosity of hollow fiber membranes with increasing initial salt content was confirmed by scanning electron microscope and atomic force microscopy.

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“…[10,11] In addition, the occurrence of flooding and entrainment of the absorption liquid limits the process and the liquid and gas streams cannot be controlled independently. [12][13][14][15] Membrane technology is an attractive, energy and cost effective alternative for conventional absorption processes. [6,16] It is easy to scale-up and has a high area-to-volume ratio.…”

Section: Introductionmentioning

confidence: 99%

“…[25][26][27][28] Gas-liquid membrane contactors have a high operational flexibility as the gas and the liquid stream can be controlled independently. [13,27,29,30] This makes them a viable technology for gas-liquid contacting processes such as the separation of olefins and paraffins, [27,31,32] blood oxygenation, [33] and the separation of CO 2 from light gases. [25] The traditional solvents used for CO 2 absorption are aqueous alkanol amine solutions, such as monoethanolamine (MEA, Figure 2a), due to their high CO 2 absorption capacity and relatively high CO 2 absorption rates.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Amino Acid Salt Solutions as Absorption Liquid for CO₂ Capture in Gas–Liquid Membrane Contactors

et al. 2010

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The strong anthropogenic increase in the emission of CO(2) and the related environmental impact force the developments towards sustainability and carbon capture and storage (CCS). In the present work, we combine the high product yields and selectivities of CO(2) absorption processes with the advantages of membrane technology in a membrane contactor for the separation of CO(2) from CH(4) using amino acid salt solutions as competitive absorption liquid to alkanol amine solutions. Amino acids, such as sarcosine, have the same functionality as alkanol amines (e.g., monoethanolamine=MEA), but in contrast, they exhibit a better oxidative stability and resistance to degradation. In addition, they can be made nonvolatile by adding a salt functionality, which significantly reduces the liquid loss due to evaporation at elevated temperatures in the desorber. Membrane contactor experiments using CO(2)/CH(4) feed mixtures to evaluate the overall process performance, including a full absorption/desorption cycle show that even without a temperature difference between absorber and desorber, a CO(2)/CH(4) selectivity of over 70 can be easily achieved with the sarcosine salt solution as absorption liquid. This selectivity reaches values of 120 at a temperature difference between absorber and desorber of 35 degrees C, compared to a value of only 60 for MEA under the same conditions. Although CO(2) permeance values are somewhat lower than the values obtained for MEA, the results clearly show the potential of amino acid salt solutions as competitive absorption liquids for the energy efficient removal of CO(2). In addition, due to the low absorption of CH(4) in sarcosine compared to MEA, the loss of CH(4) is reduced and significantly higher CH(4) product yields can be obtained.

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Using polypropylene and polytetrafluoroethylene membranes in a membrane contactor for CO2 absorption

Cited by 206 publications

References 38 publications

New 3-dimensional CFD modeling of CO2 and H2S simultaneous stripping from water within PVDF hollow fiber membrane contactor

New 3-dimensional CFD modeling of CO2 and H2S simultaneous stripping from water within PVDF hollow fiber membrane contactor

Highly hydrophobic microporous low‐density polyethylene hollow fiber membranes by melt‐extrusion coupled with salt‐leaching technique

Highly Selective Amino Acid Salt Solutions as Absorption Liquid for CO₂ Capture in Gas–Liquid Membrane Contactors

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Using polypropylene and polytetrafluoroethylene membranes in a membrane contactor for CO2 absorption

Cited by 206 publications

References 38 publications

New 3-dimensional CFD modeling of CO2 and H2S simultaneous stripping from water within PVDF hollow fiber membrane contactor

New 3-dimensional CFD modeling of CO2 and H2S simultaneous stripping from water within PVDF hollow fiber membrane contactor

Highly hydrophobic microporous low‐density polyethylene hollow fiber membranes by melt‐extrusion coupled with salt‐leaching technique

Highly Selective Amino Acid Salt Solutions as Absorption Liquid for CO2 Capture in Gas–Liquid Membrane Contactors

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Product

Resources

About

Highly Selective Amino Acid Salt Solutions as Absorption Liquid for CO₂ Capture in Gas–Liquid Membrane Contactors