Paper Published: Selective dehydration of 2,3-butanediol to 3-buten-2-ol over ZrO2 modified with CaO

Authors

H. Duan, Y. Yamada, S. Sato

“Selective dehydration of 2,3-butanediol to 3-buten-2-ol over ZrO2 modified with CaO”, Appl. Catal. A: General, 2014, 487, 226-233, DOI: 10.1016/j.apcata.2014.09.007 (Chiba University)

Abstract

Vapor-phase catalytic dehydration of 2,3-butanediol (2,3-BDO) was investigated over several metal oxides loaded on well-crystallized monoclinic ZrO2. In the dehydration of 2,3-BDO, unsaturated alcohol, i.e. 3-buten-2-ol (3B2OL), was preferentially produced together with major by-products such as butanone and 3-hydroxy-2-butanone over ZrO2-based catalysts. The selectivity to 3B2OL over monoclinic ZrO2 was greatly enhanced by the alkaline-earth oxides such as CaO, SrO, and BaO. At a CaO loading of 3 wt% on the monoclinic ZrO2, a Ca-O-Zr hetero-linkage was formed to generate new basic sites, and the selectivity to 3B2OL exceeded 76% at 350 °C. Poisoning experiments using CO2 and NH3 strongly suggest that the formation of 3B2OL from 2,3-BDO proceeds over base–acid concerted sites.

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Project Coordinator: Professor Emiel Hensen, E.J.M.Hensen@TUE.NL Project Manager: Dr Gabriela Dima, G.E.Dima@TUE.NL

NOVACAM is a coordinated EU-Japan project supported by the European Union and the Japan Science and Technology Agency. This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 604319.