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Insights into the synergistic effect of active centers over ZnMg/SBA-15 catalysts in direct synthesis of butadiene from ethanol
Reaction Chemistry & Engineering ( IF 3.9 ) Pub Date : 2021-1-21 , DOI: 10.1039/d0re00449a
Kangzhou Wang 1, 2, 3, 4, 5 , Xiaobo Peng 1, 2, 3, 4, 5 , Xinhua Gao 6, 7, 8, 9, 10 , Yuya Araki 1, 2, 3, 4, 5 , Heng Zhao 1, 2, 3, 4, 5 , Jiaming Liang 1, 2, 3, 4, 5 , Liwei Xiao 1, 2, 3, 4, 5 , Jienan Chen 10, 11, 12, 13, 14 , Guangbo Liu 10, 15, 16, 17 , Jinhu Wu 10, 15, 16, 17 , Guohui Yang 1, 2, 3, 4, 5 , Noritatsu Tsubaki 1, 2, 3, 4, 5
Affiliation  

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.

中文翻译:

深入了解活性中心对ZnMg / SBA-15催化剂在乙醇直接合成丁二烯中的协同作用

在将乙醇直接转化为丁二烯(ETB)方面,已经研究了具有多个活性中心的功能化催化剂。然而,控制多个活性中心的协同作用仍然是一个巨大的挑战。在这里,我们报道了一系列用于直接ETB工艺的ZnMg / SBA-15基催化剂。所述非极性溶剂Ñ利用己烷改善的ZnO,MgO和SBA-15的协同作用。表征结果表明,ZnMg的/ SBA-15 -己烷催化剂,从制备Ñ正己烷溶剂,可以增加脱氢活性,促进协同催化。ETB的直接性能表明,它对丁二烯产品具有70%的出色选择性。此外,我们的原位DRIFTS分析表明,醛醇缩合和MPV反应是直接ETB过程的决定速率的步骤。目前的工作提供了一种简单的策略来优化多个活动中心的协同作用。
更新日期:2021-01-21
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