Resistance against Carbon Deposition via Controlling Spatial Distance of Catalytic Components in Methane Dehydroaromatization

Autor: Yan Zeng, Ayano Kimura, Peipei Zhang, Jiaming Liang, Jiaqi Fan, Liwei Xiao, Chengwei Wang, Guohui Yang, Xiaobo Peng, Noritatsu Tsubaki
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Catalysts, Vol 11, Iss 2, p 148 (2021)
Druh dokumentu: article
ISSN: 11020148
2073-4344
DOI: 10.3390/catal11020148
Popis: Molybdenum-zeolite catalysts always suffer from severe carbon deposition and rapid deactivation in the methane dehydroaromatization (MDA) process. Herein, we present a strategy that controls spatial distance between Mo species and HMCM-22 zeolite over Mo/HMCM-22 catalysts, to inhibit the severe carbon deposition. Our characterization analyses demonstrate that the Mo/HMCM-22 catalysts possess the same active components, but the spatial distance plays a key role in determining product selectivity in the MDA process. The MDA performance reveals that Mo/HMCM-22-MM (mechanical milling) catalyst, with a medium spatial distance between Mo species and HMCM-22 zeolite, significantly inhibits carbon deposition and produces high selectivity to benzene. This work shows that spatial distance between molybdenum and zeolite is an important property for suppressing carbon deposition and improving benzene selectivity in MDA process.
Databáze: Directory of Open Access Journals
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