Carbon molecular sieve membrane from a microporous spirobisindane-based polyimide precursor with enhanced ethylene/ethane mixed-gas selectivity

Handle URI:
http://hdl.handle.net/10754/622717
Title:
Carbon molecular sieve membrane from a microporous spirobisindane-based polyimide precursor with enhanced ethylene/ethane mixed-gas selectivity
Authors:
Salinas, Octavio ( 0000-0003-0653-660X ) ; Ma, Xiaohua; Wang, Yingge; Han, Yu ( 0000-0003-1462-1118 ) ; Pinnau, Ingo ( 0000-0003-3040-9088 )
Abstract:
Ethylene is typically produced by steam cracking of various hydrocarbon feedstocks. The gaseous products are then separated in a demethanizer followed by a deethanizer unit and finally sent to a C splitter for the final purification step. Cryogenic distillation of ethylene from ethane is the most energy-intensive unit operation process in the chemical industry. Therefore, the development of more energy-efficient processes for ethylene purification is highly desirable. Membrane-based separation has been proposed as an alternative option for replacement or debottlenecking of C splitters but current polymer membrane materials exhibit insufficient mixed-gas CH/CH selectivity (<7) to be technically and economically attractive. In this work, a highly selective carbon molecular sieve (CMS) membrane derived from a novel spirobisindane-based polyimide of intrinsic microporosity (PIM-6FDA) was developed and characterized. PIM-6FDA showed a single-stage degradation process under an inert nitrogen atmosphere which commenced at ∼480 °C. The CMS formed by pyrolysis at 800 °C had a diffusion/size-sieving-controlled morphology with a mixed-gas (50% CH/50% CH) ethylene/ethane selectivity of 15.6 at 20 bar feed pressure at 35 °C. The mixed-gas ethylene/ethane selectivity is the highest reported value for CMS-type membranes to date.
KAUST Department:
Advanced Membranes and Porous Materials Research Center; Chemical and Biological Engineering Program; Physical Sciences and Engineering (PSE) Division
Citation:
Salinas O, Ma X, Wang Y, Han Y, Pinnau I (2017) Carbon molecular sieve membrane from a microporous spirobisindane-based polyimide precursor with enhanced ethylene/ethane mixed-gas selectivity. RSC Adv 7: 3265–3272. Available: http://dx.doi.org/10.1039/c6ra24699k.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
RSC Adv.
Issue Date:
13-Jan-2017
DOI:
10.1039/c6ra24699k
Type:
Article
ISSN:
2046-2069
Sponsors:
The work reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C6RA24699K#!divAbstract
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; Chemical and Biological Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorSalinas, Octavioen
dc.contributor.authorMa, Xiaohuaen
dc.contributor.authorWang, Yinggeen
dc.contributor.authorHan, Yuen
dc.contributor.authorPinnau, Ingoen
dc.date.accessioned2017-01-24T08:30:06Z-
dc.date.available2017-01-24T08:30:06Z-
dc.date.issued2017-01-13en
dc.identifier.citationSalinas O, Ma X, Wang Y, Han Y, Pinnau I (2017) Carbon molecular sieve membrane from a microporous spirobisindane-based polyimide precursor with enhanced ethylene/ethane mixed-gas selectivity. RSC Adv 7: 3265–3272. Available: http://dx.doi.org/10.1039/c6ra24699k.en
dc.identifier.issn2046-2069en
dc.identifier.doi10.1039/c6ra24699ken
dc.identifier.urihttp://hdl.handle.net/10754/622717-
dc.description.abstractEthylene is typically produced by steam cracking of various hydrocarbon feedstocks. The gaseous products are then separated in a demethanizer followed by a deethanizer unit and finally sent to a C splitter for the final purification step. Cryogenic distillation of ethylene from ethane is the most energy-intensive unit operation process in the chemical industry. Therefore, the development of more energy-efficient processes for ethylene purification is highly desirable. Membrane-based separation has been proposed as an alternative option for replacement or debottlenecking of C splitters but current polymer membrane materials exhibit insufficient mixed-gas CH/CH selectivity (<7) to be technically and economically attractive. In this work, a highly selective carbon molecular sieve (CMS) membrane derived from a novel spirobisindane-based polyimide of intrinsic microporosity (PIM-6FDA) was developed and characterized. PIM-6FDA showed a single-stage degradation process under an inert nitrogen atmosphere which commenced at ∼480 °C. The CMS formed by pyrolysis at 800 °C had a diffusion/size-sieving-controlled morphology with a mixed-gas (50% CH/50% CH) ethylene/ethane selectivity of 15.6 at 20 bar feed pressure at 35 °C. The mixed-gas ethylene/ethane selectivity is the highest reported value for CMS-type membranes to date.en
dc.description.sponsorshipThe work reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C6RA24699K#!divAbstracten
dc.rightsThis article is licensed under a Creative Commons Attribution 3.0 Unported Licence.en
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.titleCarbon molecular sieve membrane from a microporous spirobisindane-based polyimide precursor with enhanced ethylene/ethane mixed-gas selectivityen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentChemical and Biological Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalRSC Adv.en
dc.eprint.versionPublisher's Version/PDFen
kaust.authorSalinas, Octavioen
kaust.authorMa, Xiaohuaen
kaust.authorWang, Yinggeen
kaust.authorHan, Yuen
kaust.authorPinnau, Ingoen
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