Abstract
Nanosized ZSM-5 zeolites were synthesized by an in situ seed-induced hydrothermal method, and samples modified with an Fe promoter were prepared by the traditional wet impregnation-thermal decomposition and dielectric barrier discharge plasma (DBD) methods, respectively. The physico-chemical properties of the catalysts were studied by XRD, SEM, TEM, BET, XPS, H2-TPR, NH3-TPD and Py-IR techniques. The catalytic performance was eValuated by the methanol-to-olefin (MTO) reaction. The results showed that the acidity of the catalysts, the dispersity of the Fe promoter and the interaction degree with the ZSM-5 zeolite are closely related to product selectivity in the MTO reaction. Compared with the Fe-NZ5 sample prepared by the traditional impregnation-calcination method, the FeD-NZ5 samples prepared by the DBD method exhibited the higher selectivity of C2—C4 light olefins and the lower coke deposition during long-term eValuation (100 h), which can be attributed to the weaker acid strength, more uniform Fe promoter dispersion and strong interaction with the ZSM-5 zeolite. The developed Fe-modified catalysts have high potential for application in the MTO reaction.
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This work is supported by the National Natural Science Foundation of China (no. 21676074), Intergovernmental International Science and Technology Innovation Cooperation Key Project (2018YFE0108800), the Transformation for Science and Technology Achievements in University of Department of Education of Heilongjiang Province (TSTAU-C2018015)
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Li, Y., Su, X., Maximov, A.L. et al. Highly Selective MTO Reaction over a Nanosized ZSM-5 Zeolite Modified by Fe via the Low-Temperature Dielectric Barrier Discharge Plasma Method. Russ J Appl Chem 93, 137–148 (2020). https://doi.org/10.1134/S1070427220010152
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DOI: https://doi.org/10.1134/S1070427220010152