1988
DOI: 10.1002/aic.690340309
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Asymmetric cellulose acetate hollow fibers: Studies in gas permeation

Abstract: Gas separation behavior of permeators containing asymmetric cellulose acetate hollow fibers with the dense skin on the outside, facing the feed gas, has been investigated experimentally and theoretically using a sweep gas technique. Two systems were studied: C0,-N,, and O,-N, (air). If the membrane structure is assumed to be symmetric or homogeneous, the model complies with the present data much better, compared to the assumption that the membrane is asymmetric.Separation was carried out with the high-pressure… Show more

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Cited by 43 publications
(29 citation statements)
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“…The separation of PEG solutes increases significantly by grafting PEG to the internal surface of the hollow fibre by ",/-ray irradiation. However, the 7) separation of PEG 6000 by the base hollow fibre should be as low as 20% under the ultrafiltration conditions with an operating pressure of 20 p.s.i.g. and a feed concentration of 200 ppm for the grafting to be effective.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…The separation of PEG solutes increases significantly by grafting PEG to the internal surface of the hollow fibre by ",/-ray irradiation. However, the 7) separation of PEG 6000 by the base hollow fibre should be as low as 20% under the ultrafiltration conditions with an operating pressure of 20 p.s.i.g. and a feed concentration of 200 ppm for the grafting to be effective.…”
Section: Discussionmentioning
confidence: 99%
“…Despite its usefulness and adaptability to different membrane separation processes [1][2][3][4][5][6][7][8][9][10], the fundamental study on the hollow fibre is very scarce in the literature. The reason may be that flat-sheet membranes are relatively easy to prepare, and the fundamental principles underlying membrane formation and membrane transport are considered to be the same regardless of the membrane shape and membrane configuration.…”
Section: Introductionmentioning
confidence: 99%
“…The interesting point of this research was that the authors did not have a clear idea on industrial applications for this process and only projected that the separation of CO 2 from N 2 might be used "in order to recover carbon resources or to control CO 2 concentration in an artificial atmosphere." Sidhoum et al (1988) studied CO 2 /N 2 separation using cellulose acetate (CA) hollow fibers with dense skin on the outside. They compared separation efficiency with the high-pressure feed on the outside and the inside of the fibers and reported permeances of about 20, 3, and 0.8 GPUs 1 for CO 2 , N 2 , and O 2 , respectively.…”
Section: Non-facilitated Membranesmentioning
confidence: 99%
“…The asymmetric hollow-fiber membrane can be modeled as a homogeneous membrane regardless of whether the feed gas is fed on the skin layer or on the porous substrate. In addition, polarization concentration in the porous substrate of the membrane is negligible (Sidhoum et al, 1988b).…”
Section: Lp-mentioning
confidence: 99%