Coke accumulation and deactivation behavior of microzeolite-based Mo/HZSM-5 in the non-oxidative methane aromatization under cyclic CH₄-H₂ feed switch mode

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• 作者：Yang Song^a ; Qian Zhang^a ; ^b ; Yuebing Xu^a ; Yi Zhang^b ; Koichi Matsuoka^a ; Zhan-Guo Zhang^a ; ^{z.zhang@aist.go.jp}
• 关键词：Methane dehydroaromatization ; Mo/HZSM-5 ; Coke accumulation ; Deactivation
• 刊名：Applied Catalysis A: General
• 出版年：2017
• 出版时间：25 January 2017
• 年：2017
• 卷：530
• 期：Complete
• 页码：12-20
• 全文大小：1139 K
• 卷排序：530

文摘

The lifetime coke accumulation and deactivation behavior of Mo/HZSM-5 in the MDA reaction under cyclic CH4-H2 switch mode. Coke accumulation in the first slow deactivation stage caused the rapid decrease of benzene selectivity in the second deactivation stage. Accumulation of graphite-like C on the zeolite surface and in its inner channel mouth region dominated the slow deactivation of the catalyst. Preventing accumulation of graphite-like C becomes the key problem to be solved for designing highly coke-resistant catalyst.