Influence of synergistic effect of acid properties and pore structure of ZSM-5 zeolite on the catalytic cracking performance of pentene

被引：0
|
作者：
Bai Y. [1 ]
Zhang B. [1 ]
Liu D. [1 ]
Zhao L. [1 ]
Gao J. [1 ]
Xu C. [1 ]
机构：
[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 01期
关键词：
alkali treatment; catalytic cracking; light olefins; ZSM-5; zeolite;
D O I：
10.11949/0438-1157.20221200
中图分类号：
学科分类号：
摘要：
Hierarchical pore HZSM-5 zeolite with different acid properties was prepared by using alkali treatment with different concentrations, and the effect of their pore properties on the catalytic cracking performance of C5 olefins in FCC gasoline was investigated. The structure, morphology, acid properties and pore properties of HZSM-5 zeolite were investigated using XRD, N2 adsorption desorption, ammonia programmed temperature desorption technique (NH3-TPD), pyridine infrared (Py-IR), and scanning electron microscopy (SEM) characterization. The results showed that the appropriate concentration of alkali treatment could increase the amount of strong B acid site and mesopore volume of HZSM-5 zeolite, and significantly increase the conversion of C5 olefins and the yields of ethylene and propylene. When the alkali concentration was 0.2 mol·L-1, the synergistic effect between the strong B acid site and mesopore volume of HZSM-5 zeolite promoted the efficient conversion of C5 olefins, the conversion rate was 84.8% (mass), and the total yield of ethylene-propylene was 86.0% (mass), which was 4.4% and 15.5% higher than that of the untreated HZSM-5 zeolite, respectively. © 2023 Chemical Industry Press. All rights reserved.
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页码：438 / 448
页数：10
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