Fluoride-Treated Nano-HZSM-5 Zeolite as a Highly Stable Catalyst for the Conversion of Bioethanol to Propylene

Fluoride treatment of ZSM-5 zeolite can effectively adjust surface acidity and generate a secondary pore structure. In this study, a series of modified nano-HZSM-5 zeolites were prepared by NH F-HF mixed solution treatment and applied to the selective conversion of bioethanol to propylene at 500 °C,...

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Veröffentlicht in:Nanomaterials (Basel, Switzerland) Switzerland), 2024-09, Vol.14 (19), p.1558
Hauptverfasser: Zhou, Jian, Zhang, Ni, Meng, Tao, Guo, Qiangsheng, Xue, Zhaoteng, Mao, Dongsen
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Sprache:eng
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Zusammenfassung:Fluoride treatment of ZSM-5 zeolite can effectively adjust surface acidity and generate a secondary pore structure. In this study, a series of modified nano-HZSM-5 zeolites were prepared by NH F-HF mixed solution treatment and applied to the selective conversion of bioethanol to propylene at 500 °C, atmospheric pressure, and a WHSV of 10 h . The results showed that NH F-HF modification weakened the surface acidity of nano-HZSM-5 zeolites, thus inhibiting coke formation. Additionally, the mesopores in the nano-HZSM-5 zeolites increased after NH F-HF treatment, thereby enhancing the mass transfer rate and improving the coke-resistance ability. The NH F-HF mixed solution modification significantly improved the stability of nano-HZSM-5 zeolites in catalyzing bioethanol to propylene and greatly extended the working life of nano-HZSM-5 zeolites. It can be seen from the characterization of the deactivated catalysts that coke deposition and weakening of acidity may be the key factors for catalyst deactivation.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano14191558