Enhanced Catalytic Performance of the FCC Catalyst with an Alumina Matrix Modified by the Zeolite y Structure-Directing Agent

Mengjie Xie, Yifang Li, Ubong Jerome Etim, He Lou, Wei Xing, Pingping Wu, Xiaohe Liu, Peng Bai*, Zifeng Yan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The surface acid property of γ-Al2O3 has been modified by a zeolite Y structure-directing agent (SDA). Thus, modified γ-Al2O3 as a matrix material was used in fluid catalytic cracking (FCC) catalysts, and its performance of cracking vacuum gas oil (VGO) was evaluated. In comparsion with unmodified γ-Al2O3, the modified matrix material exhibited superior catalytic performance with heavy oil conversion increased by 5.64%, enhancing the gasoline yield by 2.19% and the LPG yield by 3.00%. Characterization results indicated that the zeolite Y SDA modification effectively introduced Si species into the framework of γ-Al2O3. The interaction between hydroxyl groups on silanol and Al-OH led to the formation of bridged hydroxyl groups (Si-OH-Al), which are the origin of medium-strength Brönsted acid sites on the modified alumina matrix accounting for the enhanced catalytic performance of FCC catalysts.

Original languageEnglish
Pages (from-to)5455-5463
Number of pages9
JournalIndustrial & Engineering Chemistry Research
Volume58
Issue number14
DOIs
StatePublished - 10 Apr 2019
Externally publishedYes

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