Chilled membranes—Efficient gas permeation at sub-ambient temperatures

Alders, Michael; König, A.; Weßling, Matthias

doi:10.1016/j.memsci.2019.01.037

Cited by 7 publications

(5 citation statements)

References 104 publications

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“…The development of high-performance polymeric membranes for gas separation is closely associated with various physical, chemical, and material science problems. − In terms of fundamental understanding membrane’ structure and functional properties, the basis for membrane surface topography influence on its gas transport properties is among the most topical issue, since, in a solution-diffusion gas transport mechanism, the first gas mixture–membrane interaction happens on the membrane surface.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Surface Effect on Gas Transport and Mechanical Properties in Nonporous Polymeric Membranes in Terms of Surface Free Energy

et al. 2020

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The contribution of surface roughness of nonporous polymeric membranes to their gas separation and mechanical properties was studied in terms of surface free energy. The membranes samples were prepared based on glassy polymers with different chain rigidity, namely polysulfone (PSU), cellulose triacetate (CTA), and poly(vinyl alcohol) (PVA). The results were obtained by atomic force and scanning electron microscopy (AFM and SEM) with individual gas permeation, wettability, and mechanical testing. The specific surface free energy (as well as its polar and dispersive components) for the polymers was calculated by the Owens−Wendt method. It was proven that the surface roughness of the polymer membranes affects both energy components; however, the degree of this influence depends on the chemical nature of the corresponding polymer. Moreover, it was assumed that the dispersive energy component is inversely correlated with any gases' total permeability. In contrast, the polar one is inversely correlated with the permeability by gases with the ability for site-specific interactions. The gas separation results confirmed this assumption. It was also shown that the mechanical properties of the polymer membranes are also influenced by the surface energy, namely, its dispersive component.

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Section: Introductionmentioning

confidence: 99%

Revealing the Surface Effect on Gas Transport and Mechanical Properties in Nonporous Polymeric Membranes in Terms of Surface Free Energy

et al. 2020

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“…These results allows one to consider sample 6 as a promising material for the separation of CO 2 -containing gas mixtures. Figures 10 and 11 demonstrate trade-off between CO2/N2 and СO2/CH4 ideal selectivities and CO2 permeability coefficients for a variety of polymers [31,32]. As one can see, PMP comprising maximal amount of -BMIm + moieties (sample 6) is located near the upper border of the diagram in both cases, and exhibits more attractive gas separation properties compared to the initial PMP.…”

Section: Resultsmentioning

confidence: 99%

Modification of Poly(4-methyl-2-pentyne) in the Supercritical Fluid Medium for Selective Membrane Separation of CO2 from Various Gas Mixtures

et al. 2020

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The modification of highly permeable films of brominated 1,2-disubstituted polyacetylene, poly(4-methyl-2-penthyne), via incorporation of in situ formed butylimidazolium bromide is reported for the first time. Principal possibility and efficiency of supercritical CO2 and CHF3 use as reaction media for the corresponding process, namely for quaternization of butylimidazole by brominated polymer are revealed. As a result, we prepared new membrane materials possessing promising properties such as stability toward organic solvents, good mechanical properties and significantly improved CO2-selectivity while maintaining gas permeability at high values. Comparative analysis of the results allowed us to determine content and conditions for the incorporation of butylimidazolium groups optimal for most efficient separation of CO2 from industrial gas mixtures. These results are of interest for the designing of new CO2 selective membranes.

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“…There are other reports of successful sub-ambient membrane operation [191,192]. Designing membranes for sub-ambient operation would require a focus on membrane fabrication and process and module designs [192]. Such efforts are usually far more successful than material development efforts [193].…”

Section: Peo-based Polymersmentioning

confidence: 99%

“…PEO membranes have also been operated at −5 • C on the pilot scale for syngas carbon capture [188]. There are other reports of successful sub-ambient membrane operation [191,192]. Designing membranes for sub-ambient operation would require a focus on membrane fabrication and process and module designs [192].…”

Section: H2 Production From H2s and Prospects For Polymeric Membranesmentioning

confidence: 99%

Polymeric Membranes for H2S and CO2 Removal from Natural Gas for Hydrogen Production: A Review

Rao,

Prasad,

Han

et al. 2023

Energies

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Natural gas, an important source of hydrogen, is expected to be crucial in the transition to a hydrogen-based economy. The landscape of the gas processing industry is set to change in the near future with the development of highly acidic sour gas wells. Natural gas purification constitutes a major share of the gas separation membrane market, and the shift to low-quality sour gas wells has been mirrored in the trends of membrane material research. Purification also constitutes the major portion of the cost of natural gas, posing implications for the cost of hydrogen production. This review provides an update on the current state of research regarding polymeric membranes for H2S removal, along with CO2 separation, from natural gas that is used for hydrogen production via steam methane reforming. The challenges of adapting polymeric membranes to ternary H2S/CO2/CH4 separations are discussed in detail. Key polymeric materials are highlighted, and the prospects for their application in H2S removal from natural gas are evaluated. Finally, the growing interest in H2 production from H2S is discussed. Advances in the membrane industry and the emergence of new membrane materials may significantly improve the commercial viability of such processes.

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Chilled membranes—Efficient gas permeation at sub-ambient temperatures

Cited by 7 publications

References 104 publications

Revealing the Surface Effect on Gas Transport and Mechanical Properties in Nonporous Polymeric Membranes in Terms of Surface Free Energy

Revealing the Surface Effect on Gas Transport and Mechanical Properties in Nonporous Polymeric Membranes in Terms of Surface Free Energy

Modification of Poly(4-methyl-2-pentyne) in the Supercritical Fluid Medium for Selective Membrane Separation of CO2 from Various Gas Mixtures

Polymeric Membranes for H2S and CO2 Removal from Natural Gas for Hydrogen Production: A Review

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