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dc.contributor.author서동진-
dc.contributor.author이현주-
dc.contributor.author하정명-
dc.contributor.author하르요 위노토-
dc.contributor.authorZuhroni Ali Fikri-
dc.contributor.author박영권-
dc.contributor.author제정호-
dc.date.accessioned2021-06-09T04:23:18Z-
dc.date.available2021-06-09T04:23:18Z-
dc.date.issued2019-02-
dc.identifier.citationVOL 241-597-
dc.identifier.issn0926-3373-
dc.identifier.other51583-
dc.identifier.urihttp://pubs.kist.re.kr/handle/201004/70373-
dc.description.abstractA novel bifunctional catalyst that enables an efficient one-pot conversion of furfural into γ-valerolactone (GVL) has been developed by anchoring heteropolyacid (HPA) on Zr-Beta zeolite. The catalysts were prepared by a post-synthesis procedure, which consists of the dealumination of Al-Beta, incorporation of Zr into the beta framework through solid-state ion-exchange and impregnation of the HPA. Zr-Beta is used as a Lewis acid catalyst to catalyze the transfer hydrogenation of furfural and levulinic acid/ester using 2-propanol as a hydrogen donor. To deal with the inability of Zr-Beta to catalyze the hydrolytic ring-opening of furans toward GVL, phosphotungstic acid (HPW) and silicotungstic acid (HSiW) were introduced to the Zr-Beta as BrØnsted acid sites. The characterization of the catalysts using XRD, UV&#8211-
dc.description.abstractvis and XPS as well as TPD of ammonia and FT-IR spectroscopy of the adsorbed pyridine revealed that the HPA/Zr-Beta possesses both isolated Lewis and BrØnsted acid sites. When they were applied to the one-pot cascade conversion of furfural, the initial activity of the HPA/Zr-Beta toward GVL production were 2&#8211-
dc.description.abstract3 times greater than that for Zr-Beta due to the enhanced hydrolytic ringopening of the furans promoted by the added BrØnsted acidity. Especially, HPW loaded Zr-Beta demonstrated a remarkable GVL yield of ∼70% at 433 K after 24 h due to its high thermal stability and stronger BrØnsted acidity, and its activity far surpasses that of the conventional Sn-Al-Beta zeolite (∼40%). Overall, this study demonstrates that an incorporation of HPA into Lewis acid Sn- or Zr-Beta zeolites is an effective strategy to create isolated Lewis and BrØnsted acid sites within a single catalyst, thereby allowing the selective cascade catalysis for the cost-effective production of high-value chemicals.-
dc.publisherApplied catalysis B, Environmental-
dc.subjectZeolite-
dc.subjectHetropolyacid-
dc.subjectBifunctional catalyst-
dc.subjectBiomass-
dc.subjectgamma-Valerolactone-
dc.titleHeteropolyacid supported on Zr-Beta zeolite as an active catalyst for one-pot transformation of furfural to γ-valerolactone-
dc.typeArticle-
dc.relation.page588597-
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