双金属片
催化作用
铼
芳构化
甲烷
ZSM-5型
化学
表征(材料科学)
沸石
无机化学
材料科学
化学工程
纳米技术
有机化学
工程类
作者
Ángeles López‐Martín,Maria Franca Sini,Maria Giorgia Cutrufello,A. Caballero,G. Colón
标识
DOI:10.1016/j.apcatb.2021.120960
摘要
In this study, the promoting effect of rhenium addition as a co-dopant on Mo/ZSM-5 catalysts system has been analysed. Hence, bimetallic (Re-Mo/ZSM-5) catalysts have been synthesized using a sequential impregnation methodology. The catalytic performance for direct aromatization of methane reaction has been determined and correlated with their physical and chemical state combining multiple characterization techniques. An important synergy between Mo and Re, affected by the sequential impregnation, has been observed. Thus, Re1-Mo4/ZSM-5 in which Re has been incorporated first shows notably higher aromatic yields and stability against deactivation. Characterization results suggest that catalytic enhancement is due to the important effect of Re presence in close interaction with Mo. Improved evolution of ethane through C-C coupling would be correlated to this catalytic performance. As we discuss, Mo nature and location in the bimetallic systems are strongly conditioned by Re and the impregnation sequence and favours such intermediate step.
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