Enhancing CO<sub>2</sub> absorption efficiency using a novel PTFE hollow fiber membrane contactor at elevated pressure

Wang, Fushan; Kang, Guodong; Liu, Dandan; Li, Meng; Cao, Yijun

doi:10.1002/aic.16014

Cited by 19 publications

(6 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the past decades, extensive lab‐scale studies have been reported on membrane absorption (MA) for CO 2 capture using various membrane materials, such as polypropylene (PP) 4 and polytetrafluoroethylene (PTFE), 5–8 and chemical solvents, such as monoethanolamine (MEA), 4 and 4‐diethylamino‐2‐butanol (DEAB) 9 . In addition, some effective approaches are used to reduce the mass transfer resistance of membrane element, such as preparing membranes with notable hydrophobicity (to prevent membrane wetting) 10 and with asymmetric structure (to increase permeability) 11 .…”

Section: Introductionmentioning

confidence: 99%

Geometry effect on membrane absorption for CO₂ capture. Part I: A hybrid modeling approach

Wang

et al. 2021

AIChE Journal

View full text Add to dashboard Cite

Membrane absorption (MA) has a great prospect for CO2 capture. In MA modeling, conventional one‐dimensional (1D)‐ and two‐dimensional (2D)‐models make simplification of membrane contactor (MC) geometry. Geometry simplification allows an easy process modeling and numerical solution, however, is only reasonable for particular MCs. Here, efforts are underway to quantify the geometry effect on the MA‐CO2 performance. First, we proposed a rigorous 3D model without geometry simplification for simulating the MA‐CO2 process in real MCs and then validated it with experimental data. More importantly, we highlighted a preferable hybrid model in which two correction factors were introduced to a 2D model to make the simulation results approximately equal to the 3D simulation values. The correction factors were correlated with dimensionless fluid dynamic parameters for characterizing the geometry effects on flowing fluids. Such hybrid modeling contributes to characterizing the influence of geometry on the MA‐CO2 performance and improving computation accuracy‐efficiency combinations.

show abstract

Section: Introductionmentioning

confidence: 99%

Geometry effect on membrane absorption for CO₂ capture. Part I: A hybrid modeling approach

Wang

et al. 2021

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…The membrane material is crucial to a membrane contactor. Commercial membrane materials include organic membranes, mixed matrix membranes, , ceramic membranes, , etc. Ceramic membranes with the advantages of high mechanical strength and chemical stability are propitious for withstanding high-temperature and corrosive ship exhaust .…”

Section: Introductionmentioning

confidence: 99%

Investigation of Mass Transfer Characteristics of SO₂ Absorption into NaOH in a Multichannel Ceramic Membrane Contactor

Kong

Gong

Ke³

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

A ceramic membrane with multichannels generally has a higher specific area and larger throughput compared to that with a single channel, which is beneficial to the industrialization of ceramic membrane contactors for SO 2 absorption. In this work, the mass transfer performance of SO 2 absorption into NaOH solution was investigated at various gas and liquid operating conditions in a membrane contactor packed with a 19-channel hydrophilic membrane. The results showed that increasing the NaOH concentration can offset the effect of membrane thickness. To analyze the mass transfer process, a 3D mass transfer model was developed to simulate the concentration distribution of the components. The simulated SO 2 fluxes were consistent with the experimental results. Additionally, the mass transfer model was applied to optimize the structure of channels in multichannel ceramic membranes. The operational mode of the multichannel ceramic membrane is optimized by blocking some inside channels to reduce the mass transfer resistance.

show abstract

“…Among the materials above, PTFE has attracted much attention in recent years 11 . Thanks to its unique properties including excellent chemical resistance, thermal stability, and hydrophobicity, 12 PTFE membranes have great potential in membrane distillation, 13–15 MBR wastewater treatment, 16 CO 2 absorption, 17–19 absorbent regeneration, 20 bromine enrichment from brine, 21 PM2.5 removal, 22 and so forth.…”

Section: Introductionmentioning

confidence: 99%

Study on two‐stage stretching strategy for microstructure improvement of polytetrafluoroethylene hollow fiber membrane

Jia

Zhou

Liu

et al. 2022

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Polytetrafluoroethylene (PTFE) has excellent chemical resistance, thermal stability as well as hydrophobicity, and is regarded as a good material for membrane fabrication. PTFE hollow fiber membrane is commonly prepared by the paste extrusion–stretching–sintering process, where the stretching temperature is usually fixed in existing reports. In this paper, a new two‐stage stretching method (first at 50°C and then at 200°C) was proposed to optimize the microstructure of PTFE hollow fiber membranes. Meanwhile, the stretching experiments at low‐temperature (50°C) and high‐temperature (200°C) were also conducted for comparison. The chemical composition, surface morphology, surface porosity, overall porosity, maximum pore size, water contact angle, and mechanical property were discussed. Moreover, the ethanol permeation flux and bovine serum albumin (BSA) rejection of PTFE hollow fiber membranes prepared from different stretching manners were tested. The results showed that with the increase of stretching ratio, the porosity, and pore size gradually increased for all three membranes. However, for a specific stretching ratio, the membrane fabricated by two‐stage stretching process exhibited better comprehensive properties in terms of porosity and pore size, that is, higher porosity than the 50°C method and smaller pore size than the 200°C method. As stretching ratio was 2.0, the ethanol permeation flux and BSA rejection was 2467 L/m2 h and 95%, respectively. Overall, the PTFE hollow fiber prepared from “two‐stage” stretching exhibited comparable BSA rejection (both around 95%) and much higher permeation flux (increased by 43.1%) compared to the sample prepared by low‐temperature stretching at 50°C, and meanwhile, comparable permeation flux (decreased by 10.8%) and higher BSA rejection (95% against 81%) compared to the sample prepared by high‐temperature stretching at 200°C. The proposed method provided a good reference for the microstructure improvement of PTFE hollow fiber membrane fabricated by paste extrusion–stretching–sintering technology.

show abstract

Enhancing CO₂ absorption efficiency using a novel PTFE hollow fiber membrane contactor at elevated pressure

Cited by 19 publications

References 51 publications

Geometry effect on membrane absorption for CO₂ capture. Part I: A hybrid modeling approach

Geometry effect on membrane absorption for CO₂ capture. Part I: A hybrid modeling approach

Investigation of Mass Transfer Characteristics of SO₂ Absorption into NaOH in a Multichannel Ceramic Membrane Contactor

Study on two‐stage stretching strategy for microstructure improvement of polytetrafluoroethylene hollow fiber membrane

Contact Info

Product

Resources

About

Enhancing CO2 absorption efficiency using a novel PTFE hollow fiber membrane contactor at elevated pressure

Cited by 19 publications

References 51 publications

Geometry effect on membrane absorption for CO2 capture. Part I: A hybrid modeling approach

Geometry effect on membrane absorption for CO2 capture. Part I: A hybrid modeling approach

Investigation of Mass Transfer Characteristics of SO2 Absorption into NaOH in a Multichannel Ceramic Membrane Contactor

Study on two‐stage stretching strategy for microstructure improvement of polytetrafluoroethylene hollow fiber membrane

Contact Info

Product

Resources

About

Enhancing CO₂ absorption efficiency using a novel PTFE hollow fiber membrane contactor at elevated pressure

Geometry effect on membrane absorption for CO₂ capture. Part I: A hybrid modeling approach

Geometry effect on membrane absorption for CO₂ capture. Part I: A hybrid modeling approach

Investigation of Mass Transfer Characteristics of SO₂ Absorption into NaOH in a Multichannel Ceramic Membrane Contactor