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dc.contributor.authorWang, Cheng-Yuen_US
dc.contributor.authorWang, Linxien_US
dc.contributor.authorBelnick, Andrewen_US
dc.contributor.authorWang, Haoen_US
dc.contributor.authorLi, Jingen_US
dc.contributor.authorLueking, Angela D.en_US
dc.date.accessioned2018-08-21T05:53:57Z-
dc.date.available2018-08-21T05:53:57Z-
dc.date.issued2017-06-29en_US
dc.identifier.issn0009-2509en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.ces.2017.02.020en_US
dc.identifier.urihttp://hdl.handle.net/11536/145385-
dc.description.abstractDevelopment of an oxygen selective adsorbent is anticipated to reduce the material and energy requirements for adsorptive separations of air by a factor of four, due to the relative concentrations of N-2 and O-2 in air, thereby decreasing the parasitic energy losses, carbon dioxide emissions, and cost of oxygen purification via pressure-swing adsorption. Here, we report that RPM3-Zn (a. k. a. Zn-2(bpdc)(2)(bpee); bpdc = 4,4'-biphenyldicarboxylate; bpee = 1,2-bipyridylethene) is oxygen selective over nitrogen at temperatures from 77 K to 273 K, although the oxygen capacity of the sorbent decreased markedly at increasing temperatures. Due to an oxygen diffusivity that is similar to 1000-fold greater than nitrogen, the effective oxygen selectivity increases to near infinity at low temperature at equal contact times due to N2 mass transfer limitations for gate-opening. The kinetic limitation for N-2 to open the structure has a sharp temperature dependence, suggesting this effective kinetic selectivity may be "tuned in" for other flexible metalorganic- frameworks. Although the low temperature oxygen selectivity is not practical to displace cryogenic distillation, the results suggest a new mechanism for tailoring materials for kinetic selectivity, namely, capitalizing upon the delayed opening process for a particular gas relative to another. Published by Elsevier Ltd.en_US
dc.language.isoen_USen_US
dc.subjectMetal organic frameworksen_US
dc.subjectRPM3-Znen_US
dc.subjectAir separationen_US
dc.subjectGate openingen_US
dc.subjectKinetic selectivityen_US
dc.titleOxygen-selective adsorption in RPM3-Zn metal organic frameworken_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.ces.2017.02.020en_US
dc.identifier.journalCHEMICAL ENGINEERING SCIENCEen_US
dc.citation.volume165en_US
dc.citation.spage122en_US
dc.citation.epage130en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000399489200014en_US
Appears in Collections:Articles