title: Catalytic properties of highly ordered crystalline nanoporous tungsten oxide in butanol dehydration.
abstract: Highly ordered mesoporous tungsten oxide (meso-WO3) was successfully synthesized using mesoporous silica KIT-6 as a hard template via the nanoreplication method. The physicochemical properties of meso-WO3 were characterized by X-ray diffraction, nitrogen adsorption-desorption, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed desorption of ammonia, and infra-red spectroscopy of adsorbed pyridine. No oxidation state other than WO3 was observed in the meso-WO3 sample. Lewis acid sites were dominant in meso-WO3, which could be confirmed by infra-red spectroscopy of pyridine and temperature-programmed desorption of ammonia. Its catalytic behavior in 2-butanol dehydration was investigated in a fixed bed reactor and compared with that of the WO3/MCM-41 catalyst prepared by the atomic layer deposition method. The meso-WO3 catalyst exhibited higher 2-butanol dehydration activity than that of the WO3/MCM-41 catalyst, which is ascribed to the stronger acidity as well as higher amount of acid sites that are mainly composed of Lewis acid sites in the meso-WO3 catalyst.
authors.forename: Hyeonhee
authors.initials: H
authors.lastname: Choi
authors.forename: Eunok
authors.initials: E
authors.lastname: Lee
authors.forename: Mingshi
authors.initials: M
authors.lastname: Jin
authors.forename: Young-Kwon
authors.initials: YK
authors.lastname: Park
authors.forename: Ji Man
authors.initials: JM
authors.lastname: Kim
authors.forename: Jong-Ki
authors.initials: JK
authors.lastname: Jeon