[1]何清,翁仁贵,O?uzhan Akin,等.Ga改性ZSM-5催化聚丙烯热解蒸气提质研究[J].福建理工大学学报,2026,24(04):1-10.
　Catalytic Upgrading of Polypropylene Pyrolysis Vapors over Ga-Modified ZSM-5[J].Journal of Fujian University of Technology;,2026,24(04):1-10.
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Ga改性ZSM-5催化聚丙烯热解蒸气提质研究()
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《福建理工大学学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第24卷
期数:
2026年04期
页码:
1-10
栏目:
出版日期:
2026-08-25

文章信息/Info

Title:
Catalytic Upgrading of Polypropylene Pyrolysis Vapors over Ga-Modified ZSM-5
作者:
何清; 翁仁贵; O?uzhan Akin; Robin John Varghese; Kevin M. Van Geem
文献标志码:
A
摘要:
本研究考察Ga改性ZSM-5催化聚丙烯（PP）热解，分析催化剂结构、产物分布及表观动力学。Ga负载改变ZSM-5的织构与酸性，使比表面积、孔容及强酸位点减少，弱酸位点比例升高。与原始ZSM-5相比，Ga改性催化剂促进C3/C4烯烃向芳香烃转化。其中，1 wt.% Ga改性ZSM-5（Ga1-ZM）因Ga物种与可及酸位协同优，芳构化性能最佳。反应条件影响产物选择性。升高温度促进烯烃二次裂解、环化和脱氢芳构化，使产物向乙烯和单环芳烃转移。载气流速升高缩短PP热解蒸气在床层中的停留时间，抑制芳构化，利于烯烃保留。集总串联反应网络模型描述了产物分布，并揭示初级裂解与二次芳构化的竞争关系。
Abstract:
This study investigated Ga-modified ZSM-5 zeolites for the catalytic pyrolysis of polypropylene (PP), with emphasis on catalyst structure, product distribution, and apparent kinetic behavior. Ga loading altered the textural and acidic properties of ZSM-5, decreasing the specific surface area, pore volume, and number of strong acid sites, while increasing the proportion of weak acid sites. Compared with the parent ZSM-5 catalyst, Ga-modified catalysts significantly enhanced the secondary conversion of C3/C4 olefin intermediates into aromatic hydrocarbons. Among the studied catalysts, 1 wt.% Ga-modified ZSM-5 (Ga1-ZM) exhibited the best aromatization performance, owing to the optimized synergy between Ga species and accessible zeolitic acid sites. Reaction conditions have a pronounced impact on product selectivity. Increasing temperature promoted secondary cracking, cyclization, and dehydrogenation-aromatization of olefinic intermediates, shifting the product distribution toward ethylene and monocyclic aromatic hydrocarbons. In contrast, increasing the carrier gas flow rate shortened the residence time of PP pyrolysis vapors in the catalyst bed, suppressed secondary aromatization, and favored the retention of intermediate olefins. A lumped sequential reaction network model reasonably described the observed product-distribution trends and revealed the competition between primary PP cracking and secondary aromatization during catalytic pyrolysis over Ga-modified ZSM-5 catalysts
更新日期/Last Update: 2026-09-17