Insights into the synergistic effect of active centers over ZnMg/SBA-15 catalysts in direct synthesis of butadiene from ethanol

Kangzhou Wang; Xiaobo Peng; Xinhua Gao; Yuya Araki; Heng Zhao; Jiaming Liang; Liwei Xiao; Jienan Chen; Guangbo Liu; Jinhu Wu; Guohui Yang; Noritatsu Tsubaki

doi:10.1039/D0RE00449A

Insights into the synergistic effect of active centers over ZnMg/SBA-15 catalysts in direct synthesis of butadiene from ethanol†

Kangzhou Wang,^a Xiaobo Peng,*^a Xinhua Gao,^b Yuya Araki,^a Heng Zhao,^a Jiaming Liang,^a Liwei Xiao,^a Jienan Chen,^c Guangbo Liu,^d Jinhu Wu,^d Guohui Yang

*^a and Noritatsu Tsubaki

*^a

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* Corresponding authors

^a Department of Applied Chemistry, Graduate School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
E-mail: pengxb@eng.u-toyama.ac.jp, thomas@eng.u-toyama.ac.jp, tsubaki@eng.u-toyama.ac.jp

^b State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China

^c Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China

^d Qingdao Institute of Biomass Energy and Bioprocess Technology, Chinese Academy of Science, Qingdao 266101, China

Abstract

Functionalized catalysts with multiple active centers have been studied in direct conversion of ethanol to butadiene (ETB). However, it is still a considerable challenge to control the synergistic effect of multiple active centers. Here, we report that a series of ZnMg/SBA-15-based catalysts were synthesized for the direct ETB process. The non-polar solvent n-hexane is utilized to improve the synergistic effects of ZnO, MgO and SBA-15. The characterization results demonstrate that the ZnMg/SBA-15-hexane catalyst, prepared from n-hexane solvent, can increase dehydrogenation activity and promote synergistic catalysis. The direct ETB performance reveals that it exhibits an excellent selectivity of 70% towards the butadiene product. Further, our in situ DRIFTS analysis indicates that aldol condensation and the MPV reaction are the rate-determining steps of the direct ETB process. The present work offers a simple strategy to optimize synergies of multiple active centers.

Reaction Chemistry & Engineering

Insights into the synergistic effect of active centers over ZnMg/SBA-15 catalysts in direct synthesis of butadiene from ethanol†

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Insights into the synergistic effect of active centers over ZnMg/SBA-15 catalysts in direct synthesis of butadiene from ethanol

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