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

ABSTRACT: 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 NH₄F-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^-1. The results showed that NH₄F-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 NH₄F-HF treatment, thereby enhancing the mass transfer rate and improving the coke-resistance ability. The NH₄F-HF mixed solution modification significantly improved the stability of nano-HZSM-5 ze

SUBMITTER: Zhou J 

PROVIDER: S-EPMC11478267 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature