A series of bifunctional ZnCe@SBA-15 catalysts with different Zn/Ce ratios were prepared by a solid-state grinding strategy and used in the conversion of ethanol to 1,3-butadiene(ETB).For the supported metal oxides,ZnO serves as the active sites for the dehydrogenation of ethanol,and CeO2 promotes the aldol-condensation reaction.Based on the results of Py-FTIR and NH3-TPD,it suggests that the yield of 1,3-butadiene is positively correlated with the number of weak Lewis acid sites on the catalyst surface,given their benefit for aldol-condensation reactions.The catalyst with an optimal Zn/Ce ratio of about 1:5 has the highest concentration of weak Lewis acid.Coupling with the ZnO sites,it contributes to a 98.4％con-version of ethanol and a 45.2％selective of 1,3-butadiene under relatively mild reaction conditions(375℃,101.325 kPa,and 0.54 h-1).

Zheng Wang;Sijia Li;Shengping Wang;Jiaxu Liu;Yujun Zhao;Xinbin Ma

Key Laboratory for Green Chemical Technology of Ministry of Education,School of Chemical Engineering and Technology,Collaborative Innovation Center of Chemical Science and Engineering,Tianjin University,Tianjin 300072,China;State Key Laboratory of Fine Chemicals,Department of Catalytic Chemistry and Engineering,Dalian University of Technology,Dalian 116024,China

中国化学工程学报（英文版）

[1]Zheng Wang;Sijia Li;Shengping Wang;Jiaxu Liu;Yujun Zhao;Xinbin Ma-.Coupling effect of bifunctional ZnCe@SBA-15 catalyst in 1,3-butadiene production from bioethanol)[J].中国化学工程学报（英文版）,2022(05):162-170

ZnCe

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