Journal of Catalysis 360 (2018) 221–239 Contents lists available at ScienceDirect Journal of Catalysis journal homepage: www.elsevier.com/locate/jcat Mechanistic study of the catalytic conversion of 2,3-butanediol to butenes Quanxing Zheng, Jiayi Xu, Bin Liu, Keith L. Hohn Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA article i nfo abstract Article history: The reaction kinetics of 2,3-butanediol (2,3-BDO) and other key intermediates, including methyl ethyl Received 6 September 2017 ketone (MEK), 2-methylpropanal, acetoin, 2-butanol and 2-methyl-1-propanol, were investigated over Revised 24 January 2018 acidic zeolites (ZSM-5, and Y-type zeolite), Cu/ZSM-5, Cu/Y and Cu/SiO to elucidate the roles of acid Accepted 29 January 2018 and metal sites in the process of hydrodeoxygenation of 2,3-BDO to butene. Hydrogenation and dehydro- Available online 24 February 2018 genation reactions occur on Cu sites, while dehydration reactions take place on acid sites. At low space time, 2,3-BDO can readily be converted to acetoin by dehydrogenation over supported Cu catalysts, how- Keywords: ever, with increasing space time, the formed acetoin is hydrogenated back to 2,3-BDO. DFT (density func- 2,3-Butanediol tional theory) calculations suggest that the cage structure of Y zeolite allows the formation of larger Cu Butene clusters, potentially blocking acid sites and preventing
Journal of Catalysis – Elsevier
Published: Apr 1, 2018
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