Graviton hollow gas-separating fibre

Kostrov, Yu. A.; Mostovaya, G. B.; Ignatenko, T. I.; Ardashnikov, A.Ya.; Khutorskii, B. Ya.

doi:10.1007/bf00549422

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A technological process used for preparing PMP-based "Graviton" HFs was developed in the 1980s [19]. Unfortunately, in applying membrane modules based on "Graviton" HFs in real gas separation processes, it was discovered that the HFs were blocked due to the capillary condensation of water vapors inside the fiber as a result of its small internal diameter.…”

Section: Introductionmentioning

confidence: 99%

Designing 3D Membrane Modules for Gas Separation Based on Hollow Fibers from Poly(4-methyl-1-pentene)

et al. 2021

View full text Add to dashboard Cite

Designing hollow fiber (HF) membrane modules occupies one of the key positions in the development of efficient membrane processes for various purposes. In developing HF membrane modules, it is very important to have a uniform HF distribution and flow mixing in the shell side to significantly improve mass transfer and efficiency. This work suggests the application of different textile 3D HF structures (braided hoses and woven tape fabrics). The 3D structures consist of melt-spun, dense HFs based on poly(4-methyl-1-pentene) (PMP). Since the textile processing of HFs can damage the wall of the fiber or close the fiber bore, the membrane properties of the obtained structures are tested with a CO2/CH4 mixture in the temperature range of 0 to 40 °C. It is shown that HFs within the textile structure keep the same transport and separation characteristics compared to initial HFs. The mechanical properties of the PMP-based HFs allow their use in typical textile processes for the production of various membrane structures, even at a larger scale. PMP-based membranes can find application in separation processes, where other polymeric membranes are not stable. For example, they can be used for the separation of hydrocarbons or gas mixtures with volatile organic compounds.

show abstract

Section: Introductionmentioning

confidence: 99%

Designing 3D Membrane Modules for Gas Separation Based on Hollow Fibers from Poly(4-methyl-1-pentene)

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The peak of interest in PMP as a membrane material falls on the 1980s. For example, in the USSR, a reagent-free technological process for producing hollow fibers (HFs) "Graviton" was developed [9], which was used to manufacture membrane gas separation devices used to concentrate oxygen and/or generate technical nitrogen from air. Unfortunately, due to technological limitations, the thickness of HFs dense walls was quite large and, in order to ensure a high specific productivity of membrane modules, the diameter of the HFs was minimized as much as possible, which, in practical application, led to the occurrence of capillary condensation of water vapor inside the HFs and their clogging.…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of Butane Transfer in Poly(4-Methyl-1-Pentene)

Markova

Pelzer

Shalygin

2021

Membr. Membr. Technol.

View full text Add to dashboard Cite

The features of the butane transfer through homogeneous membranes 40-50 μm thick based on poly(4-methyl-1-pentene) (PMP) of various crystallinity degrees have been investigated in the temperature range from 10 to 80°C. It has been shown that in this temperature range, including T g of the polymer, for continuous PMP membranes obtained by the melt technology there is a significant influence of butane activity, which was previously described in the literature for composite membranes based on PMP with thin selective layers formed from solutions. It has been noted that the degree of crystallinity of PMP has a significant effect on the permeability. Based on the experimental data, the temperature parameters have been calculated taking into account the exponential form of the dependence of permeability on the butane activity. Temperature dependences have been obtained in the absence of the influence of butane on the polymer, which have a nearly linear form in the Arrhenius coordinates, while practically coinciding for samples with different degrees of crystallinity.

show abstract

“…Another advantage of HFs is that they are processable to textile modules of almost any shape. Hollow fiber gas separation membranes named "Graviton" based on PMP began to be produced back in the 1980s in Russia at NPO Chimvolokno (Moscow) [5] but were discontinued at the end of the same century. As of today, the PMP has been most thoroughly investigated for the permeability and selectivity of the O 2 /N 2 mixture for solving practical problems of obtaining technical nitrogen or concentrating oxygen; but there are also data in the literature on the permeability of other gases [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Hollow Fiber Membranes Based On Poly(4-methyl-1-pentene) for Gas Separation

Dukhov

Pelzer

Markova

et al. 2021

Fibers

View full text Add to dashboard Cite

New hollow fiber gas separation membranes with a non-porous selective layer based on poly(4-methyl-1-pentene) (PMP) granules have been obtained using the solution-free melt spinning process. The influence of the preparation conditions on the geometry of the obtained samples was studied. It was found that a spin head temperature of 280 °C and a specific mass throughput of 103 g mm−2 h−1 are optimal to obtain defect-free, thin-walled hollow fibers in a stable melt spinning process, using the given spinneret geometry and a winding speed of 25 m/min. The gas permeability and separation properties of new fibers were studied using CO2/N2 and CO2/CH4 mixtures, and it was found that the level of gas selectivity characteristic of homogeneous polymer films can be achieved. The features of the gas mixture components permeability below and above the PMP glass transition temperature have been experimentally studied in the range of CO2 concentrations from 10 to 90% vol. The temperature dependences of the permeability of the CO2/CH4/N2 mixture through the obtained HF based on PMP have been investigated, and the values of the apparent activation energies of the permeability have been calculated, which make it possible to predict the properties of membrane modules based on the obtained membranes in a wide temperature range.

show abstract

Graviton hollow gas-separating fibre

Cited by 3 publications

References 0 publications

Designing 3D Membrane Modules for Gas Separation Based on Hollow Fibers from Poly(4-methyl-1-pentene)

Designing 3D Membrane Modules for Gas Separation Based on Hollow Fibers from Poly(4-methyl-1-pentene)

Peculiarities of Butane Transfer in Poly(4-Methyl-1-Pentene)

Preparation of Hollow Fiber Membranes Based On Poly(4-methyl-1-pentene) for Gas Separation

Contact Info

Product

Resources

About