title: Preparation of highly dispersed tungsten oxide on MCM-41 via atomic layer deposition and its application to butanol dehydration.
abstract: Highly dispersed tungsten oxide on MCM-41 was synthesized using a novel atomic layer deposition (ALD) method. BET, XRD, XPS, NH3-TPD, and pyridine-IR were used to study the physicochemical properties of the supported tungsten oxides. In this study, the maximum loading of tungsten oxide on MCM-41 that could be prepared using the modified ALD method was 27.0 wt%. It was confirmed that the textural properties of the mesoporous silica were maintained after tungsten oxide loading. The NH3-TPD and Py-IR results indicated that weak acid sites, mainly Lewis acid sites, were produced over the WO3/MCM-41 samples. Moreover, 2-butanol dehydration was performed to demonstrate the potential advantages of the WO3/MCM-41 catalysts. The WO3/MCM-41 catalyst with 27.0 wt% tungsten oxide loading showed the highest activity in the dehydration of 2-butanol, which was attributed to the highest overall number of acid sites among the WO3/MCM-41 catalysts. The highly dispersed tungsten oxide on MCM-41 prepared via ALD can be an effective catalyst for producing butenes through 2-butanol dehydration.
authors.affiliation: Department of Chemical Engineering, Kongju National University, Cheonan, 330-717, Republic of Korea.
authors.forename: Hyeonjoo
authors.initials: H
authors.lastname: Kim
authors.forename: Soyeon
authors.initials: S
authors.lastname: Jeong
authors.forename: Do Heui
authors.initials: DH
authors.lastname: Kim
authors.forename: Young-Kwon
authors.initials: YK
authors.lastname: Park
authors.forename: Jong-Ki
authors.initials: JK
authors.lastname: Jeon