https://doi.org/10.15255/KUI.2020.041
Published: Kem. Ind. 70 (3-4) (2021) 121–127
Paper reference number: KUI-41/2020
Paper type: Original scientific paper
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Green Synthesis and Application of ZSM-5 Zeolite

O. Chen, S. C. Liu, P. Q. Zhang and S. Q. Zheng

Abstract

A ZSM-5 molecular sieve composite with a wide pore prepared by the solid phase in-situ synthesis method and fluid catalytic cracking, and an FCC catalyst additive prepared by the same ZSM-5 molecular sieve for increasing the amount of light olefin yield were investigated. The samples were characterized by XRD, N₂ adsorption/desorption, SEM, and NH₃-TPD, respectively. The results showed that the structure of the ZSM-5 molecular sieve composite prepared by solid phase in-situ synthesis method was pure MFI-type zeolite material. The crystallinity of ZSM-5 molecular sieve was 59.8 wt%. The synthesized ZSM-5 molecular sieve had more acid content and a wide-pore structure. The average pore size was 5.9 nm, and BET specific surface area and micropore specific surface area of sample were 213 m² g^–1 and 124 m² g^–1, respectively. The evaluated results indicated that the FCC catalyst additive had good selectivity for LPG, propylene, and butene, increasing propylene and butene yields by 2.28 wt% and 2.15 wt%, respectively, as well as had better heavy oil cracking capability and coke selectivity.

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Keywords

ZSM-5 zeolite, in-situ technology, solid phase synthesis method, FCC catalyst additive, increasing light olefin yield