Membranes for the Gas/Liquid Phase Separation at Elevated Temperatures: Characterization of the Liquid Entry Pressure

Claramunt, Sara; Völker, F.; Gerhards, Uta; Kraut, Manfred; Dittmeyer, Roland

doi:10.3390/membranes11120907

Cited by 5 publications

(5 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liquid entry pressure A reduction in the pore size may lead to an increased LEP value for the PTFE-CNT electrosprayed membrane compared to the PTFE membrane. Similar results are also reported by Calaramunt et al 32 .…”

Section: Results and Discussion MD Membrane Characteristicssupporting

confidence: 92%

Electrohydrodynamic atomization of CNT on PTFE membrane for scaling resistant membranes in membrane distillation

Francis

Hilal

2023

npj Clean Water

View full text Add to dashboard Cite

In this study, an electrohydrodynamic atomization or electrospraying technique is used for the uniform deposition of carbon nanotubes (CNT) on a commercially available PTFE membrane and employed for Membrane Distillation (MD) process. Modified PTFE-CNT membrane was characterized for water contact angle, liquid entry pressure (LEP), pore size distribution, and surface morphology. The electrospray coating of CNT on the PTFE membrane enhances the turbulence and thereby the temperature polarization coefficient (TPC). The pore size of the micropatterned PTFE-CNT membrane has been reduced and pore size distribution has been narrowed compared to the PTFE membrane. Field-effect scanning electron microscopy images of the membranes were observed before and after the MD process. Functionally graded PTFE-CNT membrane showed superior desalination performance compared to the PTFE membrane with less amount of cake layer formation on the membrane surface. Water vapor flux remained constant during 24-h continuous MD process operation with 99.99% rejection of inorganic salts.

show abstract

Section: Results and Discussion MD Membrane Characteristicssupporting

confidence: 92%

Electrohydrodynamic atomization of CNT on PTFE membrane for scaling resistant membranes in membrane distillation

Francis

Hilal

2023

npj Clean Water

View full text Add to dashboard Cite

show abstract

“…A critical wetting temperature in the range from 130 to 135 °C was found for FAS-grafted carbon-based membrane titania [ 20 , 21 ], indicating that maximum operating temperature values should not exceed 100–120 °C, values at which LEP min drops below 1 bar. Similar values have been obtained for alumina membrane grafted with FAS [ 22 ].…”

Section: Introductionsupporting

confidence: 86%

The Role of the Morphological Characterization of Multilayer Hydrophobized Ceramic Membranes on the Prediction of Sweeping Gas Membrane Distillation Performances

et al. 2022

View full text Add to dashboard Cite

This paper shows which morphological characterization method is most appropriate to simulating membrane performance in sweeping gas membrane distillation in the case of multilayer hydrophobized ceramic membranes. As a case study, capillary four-layer hydrophobic carbon-based titania membranes arranged in bundles in a shell-and-tube configuration were tested with NaCl-water solutions using air as sweeping gas, operating at temperatures from 40 to 110 °C and at pressures up to 5.3 bar. Contrary to what is generally performed for polymeric membranes and also suggested by other authors for ceramic membranes, the mass transfer across the membrane should be simulated using the corresponding values of the mean pore diameter and the porosity-tortuosity ratio of each layer and measured by the layer-by-layer (LBL) method. Comparison of the modeling results with experimental data highlights that the use of parameters averaged over the entire membrane leads to an overestimation by a factor of two to eight of the modeled fluxes, with respect to the experimental values. In contrast, the agreement between the modeled fluxes and the experimental values is very interesting when the LBL parameters are used, with a discrepancy on the order of +/−30%. Finally, the model has been used to investigate the role of operative parameters on process performances. Process efficiency should be the optimal balance between the concomitant effects of temperature and velocity of the liquid phase and pressure and velocity of the gas phase.

show abstract

“…In theory, when transmembrane pressure is kept below the LEP during the operation, the liquid in the feed does not penetrate the pores, thus, only vapor diffusion across the membrane occurs. 47 LEP for membranes under investigation was assessed during experiment where feed pressure was stepwise increased until constant water ow was detected. 2.4.6 Water vapor permeance test.…”

Section: Size-exclusion Chromatography (Sec)mentioning

confidence: 99%

Pioneering the preparation of porous PIM-1 membranes for enhanced water vapor flow

Caliskan,

Shishatskiy,

Abetz

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

Membranes for the Gas/Liquid Phase Separation at Elevated Temperatures: Characterization of the Liquid Entry Pressure

Cited by 5 publications

References 49 publications

Electrohydrodynamic atomization of CNT on PTFE membrane for scaling resistant membranes in membrane distillation

Electrohydrodynamic atomization of CNT on PTFE membrane for scaling resistant membranes in membrane distillation

The Role of the Morphological Characterization of Multilayer Hydrophobized Ceramic Membranes on the Prediction of Sweeping Gas Membrane Distillation Performances

Pioneering the preparation of porous PIM-1 membranes for enhanced water vapor flow

Contact Info

Product

Resources

About