MEMBRANE SEPARATION OF GASEOUS C1-C4 ALKANESстатья
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Дата последнего поиска статьи во внешних источниках: 18 апреля 2017 г.
Аннотация:The separation of various gaseous hydrocarbons with the aid of polymer membranes is considered; attention is focused on the separation of gaseous C1-C4 alkanes, which are the components of natural gas and associated petroleum gases. It is noted that a practically important property of membrane materials is the thermodynamic selectivity of a membrane, which makes it possible to enrich a permeate with heavier alkanes. Up to this point, polyacetylenes exhibited the best transport parameters for the solution of this problem. The second experimental section of this paper describes a study of separation of CH4 + C4H10 binary mixtures on films based on additive poly[3-(trimethylsilyl)tricyclononene-7]. It is demonstrated that this highly permeable saturated glassy polymer exhibits the thermodynamic selectivity in experiments with both the individual gases (CH4 and C4H10) and their mixtures and provides fivefold butane enrichment of permeate. The test polymer and others additive Si-containing norbornene polymers are of interest as membrane materials for the separation of hydrocarbon gases.