Dual layer hollow fiber sorbents: Concept, fabrication and characterization

Handle URI:
http://hdl.handle.net/10754/598024
Title:
Dual layer hollow fiber sorbents: Concept, fabrication and characterization
Authors:
Bhandari, Dhaval; Olanrewaju, Kayode O.; Bessho, Naoki; Breedveld, Victor; Koros, William J.
Abstract:
Hollow fiber sorbents are pseudo-monolithic separations materials created with fiber spinning technology using a polymer 'binder', impregnated with high loadings of sorbent 'fillers' [1]. To increase purified gas recovery during the sorption step and to ensure consistent sorption capacity over repeated cycles, a dense, thin polymer barrier layer on the fiber sorbents is needed to allow only thermal interactions between the sorbate loaded layer and the thermal regeneration fluid. This paper considers materials and methods to create delamination-free dual layer fiber sorbents, with a porous core and a barrier sheath layer formed using a simultaneous co-extrusion process. Low permeability polymers were screened for sheath layer creation, with the core layer comprising cellulose acetate polymer as binder and zeolite NaY as sorbent fillers. Appropriate core and sheath layer dope compositions were determined by the cloud-point method and rheology measurements. The morphology of the as-spun fibers was characterized in detail by SEM, EDX and gas permeation analysis. A simplified qualitative model is described to explain the observed fiber morphology. The effects of core, sheath spin dope and bore fluid compositions, spinning process parameters such as air-gap height, spin dope and coagulation bath temperatures, and elongation draw ratio are examined in detail. © 2012 Elsevier B.V. All rights reserved.
Citation:
Bhandari D, Olanrewaju KO, Bessho N, Breedveld V, Koros WJ (2013) Dual layer hollow fiber sorbents: Concept, fabrication and characterization. Separation and Purification Technology 104: 68–80. Available: http://dx.doi.org/10.1016/j.seppur.2012.11.003.
Publisher:
Elsevier BV
Journal:
Separation and Purification Technology
KAUST Grant Number:
KUS-I1-011-21
Issue Date:
Feb-2013
DOI:
10.1016/j.seppur.2012.11.003
Type:
Article
ISSN:
1383-5866
Sponsors:
The authors are thankful for the financial support by Chevron Technology Ventures. The authors acknowledge the fruitful discussions with Dr. James Stevens and Dr. Stephen Miller at Chevron and award number KUS-I1-011-21 made by King Abdullah University of Science and Technology (KAUST).
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Full metadata record

DC FieldValue Language
dc.contributor.authorBhandari, Dhavalen
dc.contributor.authorOlanrewaju, Kayode O.en
dc.contributor.authorBessho, Naokien
dc.contributor.authorBreedveld, Victoren
dc.contributor.authorKoros, William J.en
dc.date.accessioned2016-02-25T13:11:12Zen
dc.date.available2016-02-25T13:11:12Zen
dc.date.issued2013-02en
dc.identifier.citationBhandari D, Olanrewaju KO, Bessho N, Breedveld V, Koros WJ (2013) Dual layer hollow fiber sorbents: Concept, fabrication and characterization. Separation and Purification Technology 104: 68–80. Available: http://dx.doi.org/10.1016/j.seppur.2012.11.003.en
dc.identifier.issn1383-5866en
dc.identifier.doi10.1016/j.seppur.2012.11.003en
dc.identifier.urihttp://hdl.handle.net/10754/598024en
dc.description.abstractHollow fiber sorbents are pseudo-monolithic separations materials created with fiber spinning technology using a polymer 'binder', impregnated with high loadings of sorbent 'fillers' [1]. To increase purified gas recovery during the sorption step and to ensure consistent sorption capacity over repeated cycles, a dense, thin polymer barrier layer on the fiber sorbents is needed to allow only thermal interactions between the sorbate loaded layer and the thermal regeneration fluid. This paper considers materials and methods to create delamination-free dual layer fiber sorbents, with a porous core and a barrier sheath layer formed using a simultaneous co-extrusion process. Low permeability polymers were screened for sheath layer creation, with the core layer comprising cellulose acetate polymer as binder and zeolite NaY as sorbent fillers. Appropriate core and sheath layer dope compositions were determined by the cloud-point method and rheology measurements. The morphology of the as-spun fibers was characterized in detail by SEM, EDX and gas permeation analysis. A simplified qualitative model is described to explain the observed fiber morphology. The effects of core, sheath spin dope and bore fluid compositions, spinning process parameters such as air-gap height, spin dope and coagulation bath temperatures, and elongation draw ratio are examined in detail. © 2012 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThe authors are thankful for the financial support by Chevron Technology Ventures. The authors acknowledge the fruitful discussions with Dr. James Stevens and Dr. Stephen Miller at Chevron and award number KUS-I1-011-21 made by King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.subjectAdsorptionen
dc.subjectDual-layer hollow fibersen
dc.subjectFiber spinningen
dc.subjectMacrovoidsen
dc.subjectSpin dope rheologyen
dc.titleDual layer hollow fiber sorbents: Concept, fabrication and characterizationen
dc.typeArticleen
dc.identifier.journalSeparation and Purification Technologyen
dc.contributor.institutionGeorgia Institute of Technology, Atlanta, United Statesen
kaust.grant.numberKUS-I1-011-21en
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