Butanol Dehydration over V2O5-TiO2/MCM-41 Catalysts Prepared via Liquid Phase Atomic Layer Deposition

Materials

Hyeonhee Choi¹  Jung-Hyun Bae¹  Do Heui Kim²  Young-Kwon Park³ 

[1] Department of Chemical Engineering, Kongju National University, Cheonan 331-717, Korea; E-Mails:;School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Korea; E-Mail:;School of Environmental Engineering, University of Seoul, Seoul 130-743, Korea; E-Mail:

关键词: butanol;    dehydration;    MCM-41;    atomic layer deposition;    1-butene;    vanadium oxide;    titanium oxide;   

DOI  :  10.3390/ma6051718

来源: mdpi

【 摘 要 】

MCM-41 was used as a support and, by using atomic layer deposition (ALD) in the liquid phase, a catalyst was prepared by consecutively loading titanium oxide and vanadium oxide to the support. This research analyzes the effect of the loading amount of vanadium oxide on the acidic characteristics and catalytic performance in the dehydration of butanol. The physical and chemical characteristics of the TiO₂-V₂O₅/MCM-41 catalysts were analyzed using XRF, BET, NH₃-TPD, XRD, Py-IR, and XPS. The dehydration reaction of butanol was performed in a fixed bed reactor. For the samples with vanadium oxide loaded to TiO₂/MCM-41 sample using the liquid phase ALD method, it was possible to increase the loading amount until the amount of vanadium oxide reached 12.1 wt %. It was confirmed that the structural properties of the mesoporous silica were retained well after titanium oxide and vanadium loading. The NH₃-TPD and Py-IR results indicated that weak acid sites were produced over the TiO₂/MCM-41 samples, which is attributed to the generation of Lewis acid sites. The highest activity of the V₂O₅(12.1)-TiO₂/MCM-41 catalyst in 2-butanol dehydration is ascribed to it having the highest number of Lewis acid sites, as well as the highest vanadium dispersion.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.