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- Title
Catalytic Cracking for Propylene Production over Au Catalyst Supported by External Surface-Modified ZSM-5 Zeolite.
- Authors
Wu, Lei; Su, Huijuan; Sun, Xun; Sun, Libo; Zhao, Lijun; Qi, Caixia
- Abstract
To improve the yield of propylene in fluidized catalytic cracking, a series of different Au/ZSM-5-TOS catalysts were prepared by modifying ZSM-5, using an external surface modification method and Au nanoparticles. The modified catalyst maintained the MFI structure of ZSM-5, whereas the pore-opening size of the zeolite relatively decreased, without affecting its internal structure. The acidity of ZSM-5, especially the Brønsted acidity, reduced. Among the studied catalysts, the 0.2 wt% Au/ZSM-5-1%TOS catalyst exhibited the best feedstock conversion and propylene selectivity, along with a significant increase in propylene selectivity and a slight decrease in the conversion of light diesel oil, even after water vapor treatment at 800 °C for 4 h. Its catalytic activity at 360 °C exceeded that of ZSM-5 at 460 °C, showing great application potential in petrochemical processes.
- Subjects
CATALYST supports; CATALYTIC cracking; PROPENE; ZEOLITE catalysts; ZEOLITES; GOLD nanoparticles
- Publication
Catalysts (2073-4344), 2022, Vol 12, Issue 4, p418
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal12040418