scholarly journals An Experimental Study PVDF and PSF Hollow Fiber Membranes for Chemical Absorption Carbon Dioxide

2020 ◽  
pp. 91-102
Author(s):  
Ehsan Kianfar
Keyword(s):  
Carbon Dioxide ◽  
Hollow Fiber ◽  
Gas Permeability ◽  
Hollow Fiber Membrane ◽  
Co2 Absorption ◽  
Phase Flow ◽  
Surface Porosity ◽  
Fiber Membrane ◽  
Water Contact ◽  
Pvdf Membrane

Poly (vinylidene fluoride) (PVDF) and poly-sulfone (PSF) polymer solutions were made at a concentration of 18% by weight of the polymer as a non-soluble additive of polymer solution in 1-methyl-2-pyrrolidone (NMP) solvent. PVDF and PSF hollow fiber membranes were fabricated via the wet phase-inversion process. Fabricated membranes were characterized in terms of gas permeability, wetting resistance, water contact angle and overall porosity. In order to study the structure of the membranes made, the scanning electron microscopy images of the model (TM3000, HITACHI, Japan) were used. The morphology study indicates that the PSF membrane shows an open cross-section structure with smaller pore sizes. However, the PVDF membrane illustrates a thick sponge-like structure. The fabricated PVDF membrane shows higher wetting resistance, surface porosity, water contact angle, and N2 permeability. The performance of the produced membranes was examined for the Absorption of carbon dioxide in a gas-liquid contactor membrane through the solution of mono-ethanolamine (MEA). The results show that CO2 absorption flux of the PVDF hollow fiber membrane is higher than PSF hollow fiber membrane. The maximum CO2 absorption flux of 8.10 × 10-3 (mole/m2 s) at the liquid phase flow rate of 300 ml/min for PVDF hollow fiber membrane was achieved and also the maximum CO2 absorption flux of 6.50 × 10-3 (mole/m2 s) at the liquid phase flow rate of 300 ml/min for PSF hollow fiber membrane was obtained. It can be concluded that a porous hydrophobic hollow fiber membrane with high surface porosity and high gas permeability can be a productive alternative for CO2 absorption through gas-liquid membrane contactors.

Development of Ceramic Hollow Fiber Membrane Contactor Modules for Carbon Dioxide Separation

2016 ◽  
Vol 7 (3) ◽  
pp. 249
Author(s):  
Hong Joo Lee ◽  
Jin Woong Che ◽  
Jung Hoon Park
Keyword(s):  
Carbon Dioxide ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Membrane Contactor ◽  
Fiber Membrane ◽  
Carbon Dioxide Separation

scholarly journals CO2 Absorption Using Hollow Fiber Membrane Contactors: Introducing pH Swing Absorption (pHSA) to Overcome Purity Limitation

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 496
Author(s):  
Sayali Ramdas Chavan ◽  
Patrick Perré ◽  
Victor Pozzobon ◽  
Julien Lemaire
Keyword(s):  
Hollow Fiber ◽  
Recovery Rate ◽  
Hollow Fiber Membrane ◽  
Operating Conditions ◽  
Co2 Removal ◽  
Co2 Absorption ◽  
Fiber Membrane ◽  
Residual Content ◽  
Membrane Contactors ◽  
Ph Swing

Recently, membrane contactors have gained more popularity in the field of CO2 removal; however, achieving high purity and competitive recovery for poor soluble gas (H2, N2, or CH4) remains elusive. Hence, a novel process for CO2 removal from a mixture of gases using hollow fiber membrane contactors is investigated theoretically and experimentally. A theoretical model is constructed to show that the dissolved residual CO2 hinders the capacity of the absorbent when it is regenerated. This model, backed up by experimental investigation, proves that achieving a purity > 99% without consuming excessive chemicals or energy remains challenging in a closed-loop system. As a solution, a novel strategy is proposed: the pH Swing Absorption which consists of manipulating the acido–basic equilibrium of CO2 in the absorption and desorption stages by injecting moderate acid and base amount. It aims at decreasing CO2 residual content in the regenerated absorbent, by converting CO2 into its ionic counterparts (HCO3− or CO32−) before absorption and improving CO2 degassing before desorption. Therefore, this strategy unlocks the theoretical limitation due to equilibrium with CO2 residual content in the absorbent and increases considerably the maximum achievable purity. Results also show the dependency of the performance on operating conditions such as total gas pressure and liquid flowrate. For N2/CO2 mixture, this process achieved a nitrogen purity of 99.97% with a N2 recovery rate of 94.13%. Similarly, for H2/CO2 mixture, a maximum H2 purity of 99.96% and recovery rate of 93.96% was obtained using this process. Moreover, the proposed patented process could potentially reduce energy or chemicals consumption.

scholarly journals The preparation of a modified PVDF hollow fiber membrane by coating with multiwalled carbon nanotubes for high antifouling performance

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 1848-1857 ◽  
Author(s):  
MengJing Cao ◽  
Yan Zhang ◽  
BoKang Zhang ◽  
ZiQi Liu ◽  
XiangShan Ma ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Outer Surface ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Multiwalled Carbon ◽  
Pvdf Membrane

Backwashable CNT mats generated on the outer surface of a HF-PVDF membrane showed high antifouling performance.

Separation of carbon dioxide by asymmetric hollow fiber membrane of cellulose triacetate

1992 ◽  
Vol 45 (12) ◽  
pp. 2181-2186 ◽  
Author(s):  
E. Sada ◽  
H. Kumazawa ◽  
J.-S. Wang ◽  
M. Koizumi
Keyword(s):  
Carbon Dioxide ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Cellulose Triacetate ◽  
Fiber Membrane

A comparative study on the structure of developed porous PVDF and PEI hollow fiber membrane contactors for CO2 absorption

2015 ◽  
Vol 23 (1) ◽  
Author(s):  
A. Mansourizadeh ◽  
M. H. Jazebizadeh ◽  
M. R. Vaseghi ◽  
A. Aghili
Keyword(s):  
Comparative Study ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Co2 Absorption ◽  
Fiber Membrane ◽  
Membrane Contactors

Carbon dioxide absorption by monoethanolamine in hollow fiber membrane contactors: A parametric investigation

AIChE Journal ◽  
2011 ◽  
Vol 58 (9) ◽  
pp. 2843-2855 ◽  
Author(s):  
Noureddine Boucif ◽  
Jean Pierre Corriou ◽  
Denis Roizard ◽  
Eric Favre
Keyword(s):  
Carbon Dioxide ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Carbon Dioxide Absorption ◽  
Parametric Investigation ◽  
Membrane Contactors
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