Enhancing membrane hydrophobicity using silica end-capped with organosilicon for CO2 absorption in membrane contactor

Rosli, Aishah; Ahmad, Abdul Latif; Low, Siew Chun

doi:10.1016/j.seppur.2020.117429

Cited by 27 publications

(11 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A promising carbon dioxide removal process, it combines the selectivity of chemical absorption and the compactness of membrane separation. The interface area of the membrane contactor is approximately 30 times that of the conventional gas absorber, which can reduce the size of the absorber by 10 times [10].…”

Section: Introductionmentioning

confidence: 99%

Research Progress in Gas Separation Using Hollow Fiber Membrane Contactors

Pan

et al. 2020

Membranes

View full text Add to dashboard Cite

In recent years, gas–liquid membrane contactors have attracted increasing attention. A membrane contactor is a device that realizes gas–liquid or liquid–liquid mass transfer without being dispersed in another phase. The membrane gas absorption method combines the advantages of chemical absorption and membrane separation, in addition to exhibiting high selectivity, modularity, and compactness. This paper introduces the operating principle and wetting mechanism of hollow membrane contactors, shows the latest research progress of membrane contactors in gas separation, especially for the removal of carbon dioxide from gas mixtures by membrane contactors, and summarizes the main aspects of membrane materials, absorbents, and membrane contactor structures. Furthermore, recommendations are provided for the existing deficiencies or unsolved problems (such as membrane wetting), and the status and progress of membrane contactors are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Research Progress in Gas Separation Using Hollow Fiber Membrane Contactors

Pan

et al. 2020

Membranes

View full text Add to dashboard Cite

show abstract

“…The cast film was immediately immersed in a 20/80 v/v ethanol/water coagulation bath for 24 hours, and then dried for 3 days to serve as the neat membrane. 23 On the other hand, the nanocomposite membranes were synthesized by the solution blending method. A 1 wt% of LDPE/f-SiNP relative to 15 wt% of PVDF was added to the NMP solvent and stirred for 30 minutes.…”

Section: Membrane Synthesismentioning

confidence: 99%

Computational analysis of atomic binding energy for organosilicon‐ low‐density polyethylene‐coated silica embedded in polyvinylidene fluoride composite membrane for membrane gas absorption

Rosli

Paul

Low

2021

Intl J of Energy Research

Self Cite

View full text Add to dashboard Cite

In an effort to enhance the wetting resistance and chemical stability of membrane contactors, silica nanoparticles (SiNP) have been incorporated into polyvinylidene fluoride (PVDF) membrane. These SiNP have been hydrophobically functionalized with three separate organosilicons (hexamethyldisilane, dimethyldichlorosilane, and polydimethylsiloxane) to produce TS-530, TS-610, and TS-720 SiNP. Then, they were coated with low-density polyethylene (LDPE) before adding them to the membrane casting dope. Using HyperChem, the molecular interaction between SiNP, organosilicons, and LDPE, as well as their aggregation tendency, was predicted using a semi-empirical computational approach (PM3). Both theoretical predictions and experimental results show that TS-610 and TS-720 SiNP have a high propensity to agglomerate, leading to the formation of composite membranes with large macrovoids. The HyperChem analysis, however, also indicates that LDPE/f-SiNP can resist chemical corrosion, and all composite membranes show positive binding energy interactions with amines. This enables the LDPE/f-SiNP membranes to perform better than the neat PVDF membrane with an adequate amine solution, and it remains hydrophobic after prolonged exposure.

show abstract

“…Ataeivarjovi et al [ 17 ] verified that the overall mass transfer resistance can be reduced by 49% after the incorporation of silica, resulting in effective gas transport properties. Rosli et al [ 18 ] reported that composite membranes containing hybrid PDMS–silica nanoparticles showed an enhancement in their CO 2 /N 2 selectivity of 8.39 when compared to the original membrane. Moreover, the incorporation of silica can improve the thermal and mechanical properties of membranes [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Impacts of Green Synthesis Process on Asymmetric Hybrid PDMS Membrane for Efficient CO2/N2 Separation

Zhuang

Wey

et al. 2021

Membranes

View full text Add to dashboard Cite

The effects of green processes in hybrid polydimethylsiloxane (PDMS) membranes on CO2 separation have received little attention to date. The effective CO2 separation of the membranes is believed to be controlled by the reaction and curing process. In this study, hybrid PDMS membranes were fabricated on ceramic substrates using the water-in-emulsion method and evaluated for their gas transport properties. The effects of the tetraethylorthosilicate (TEOS) concentration and curing temperature on the morphology and CO2 separation performance were investigated. The viscosity measurement showed that, at specific reaction times, it is benefit beneficial to fabricate the symmetric hybrid PDMS membranes with a uniform and dense selective layer on the substrate. Moreover, the a high TEOS concentration can decrease the reaction time and obtain create the a fully crosslinked structure, allowing more efficient CO2/N2 separation. The separation performance was furtherly improved with in the membrane prepared at a high curing temperature of 120 °C. The developed membrane shows excellent CO2/N2 separation with a CO2 permeance of 27.7 ± 1.3 GPU and a CO2/N2 selectivity of 10.3 ± 0.3. Moreover, the membrane shows a stable gas separation performance of up to 5 bar of pressure.

show abstract

Enhancing membrane hydrophobicity using silica end-capped with organosilicon for CO2 absorption in membrane contactor

Cited by 27 publications

References 64 publications

Research Progress in Gas Separation Using Hollow Fiber Membrane Contactors

Research Progress in Gas Separation Using Hollow Fiber Membrane Contactors

Computational analysis of atomic binding energy for organosilicon‐ low‐density polyethylene‐coated silica embedded in polyvinylidene fluoride composite membrane for membrane gas absorption

Impacts of Green Synthesis Process on Asymmetric Hybrid PDMS Membrane for Efficient CO2/N2 Separation

Contact Info

Product

Resources

About