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dc.contributor.authorYan, Wenjuan
dc.contributor.authorRamanathan, Anand
dc.contributor.authorGhanta, Madhav
dc.contributor.authorSubramaniam, Bala
dc.date.accessioned2015-12-09T15:30:31Z
dc.date.available2015-12-09T15:30:31Z
dc.date.issued2014-08-05
dc.identifier.citationYan, Wenjuan, Anand Ramanathan, Madhav Ghanta, and Bala Subramaniam. "Towards Highly Selective Ethylene Epoxidation Catalysts Using Hydrogen Peroxide and Tungsten- or Niobium-incorporated Mesoporous Silicate (KIT-6)." Catal. Sci. Technol. 4.12 (2014): p4433-439. http://dx.doi.org/10.1039/C4CY00877Den_US
dc.identifier.urihttp://hdl.handle.net/1808/19148
dc.descriptionThis is the published version. Copyright 2014 Royal Society of Chemistryen_US
dc.description.abstractSignificant ethylene epoxidation activity was observed over Nb- and W-incorporated KIT-6 materials with aqueous hydrogen peroxide (H2O2) as the oxidant and methanol as solvent under mild operating conditions (35 °C and 50 bar) where CO2 formation is avoided. The Nb-KIT-6 materials generally show greater epoxidation activity compared to the W-KIT-6 materials. Further, the ethylene oxide (EO) productivity observed with these materials [30–800 mg EO h−1 (g metal)−1] is of the same order of magnitude as that of the conventional silver (Ag)-based gas phase ethylene epoxidation process. Our results reveal that the framework-incorporated metal species, rather than the extra-framework metal oxide species, are mainly responsible for the observed epoxidation activity. However, the tetrahedrally coordinated framework metal species also introduce Lewis acidity that promotes their solvolysis (which in turn results in their gradual leaching) as well as H2O2 decomposition. These results and mechanistic insights provide rational guidance for developing catalysts with improved leaching resistance and minimal H2O2 decomposition.en_US
dc.publisherRoyal Society of Chemistryen_US
dc.titleTowards highly selective ethylene epoxidation catalysts using hydrogen peroxide and tungsten- or niobium-incorporated mesoporous silicate (KIT-6)en_US
dc.typeArticle
kusw.kuauthorSubramaniam, Bala
kusw.kudepartmentChemical & Petroleum Engren_US
kusw.oanotesPer SHERPA/RoMEO, 12/9/15: Author's Pre-print: green tick author can archive pre-print (ie pre-refereeing) Author's Post-print: green tick author can archive post-print (ie final draft post-refereeing) Publisher's Version/PDF: green tick author can archive publisher's version/PDF General Conditions:

Pre-prints on non-commercial repositories and arXiv Post-print on author's personal website Author's post-print on institutional repository after 12 months from acceptance Publisher's version/PDF may be used on author's personal website only Publisher PDF will be supplied and may be used on author's personal website only Publisher will deposit the authors post-print, if appropriate in non-commercial repositories, not limited to funder's repositories after 12 months Restrictions on further re-use and further distribution to be noted Publisher will deposit in Chemical Sciences Article Repository if requested, after 12 months
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dc.identifier.doi10.1039/C4CY00877D
dc.identifier.orcidhttps://orcid.org/0000-0002-0864-0454 https://orcid.org/0000-0003-0220-0148
kusw.oaversionScholarly/refereed, publisher version
kusw.oapolicyThis item meets KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


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