燃料化学学报（中英文）2025，Vol.53Issue(12)：1789-1797,9.DOI:10.1016/S1872-5813(25)60571-8
脱铝H-ZSM-5表面Pt颗粒密度调控及其己烷裂解性能研究
Tailoring of Pt particle density on the surface of dealuminated ZSM-5 and its hexane cracking performance
摘要
Abstract
In this study,by loading platinum(Pt)at varying mass percentages onto acid-treating ZSM-5 zeolite with different silica-to-alumina ratio(SAR)and distinct surface acid sites via the metal-organic solid-phase synthesis method,the influence of metal-acid site ratios on the catalytic cracking of n-hexane to propane was investigated.Results demonstrated that acid treatment significantly increased the SAR of the zeolite(from 27 to 100),optimized the distribution of surface acidsites,while preserving the MFI topology.Post-Pt loading and reduction,the catalyst exhibited highly dispersed Pt nanoparticles(3.3-4.1 nm)without forming crystalline aggregates.Catalytic performance tests revealed that acid treatment enhanced the n-hexane conversion rate from 66％to 88％and propane selectivity from 50％to 57％.Pt loading exhibited a pronounced influence on performance:the medium-loaded catalyst(0.3％)achieved the highest propane selectivity(57％)and stability due to optimal metal-acid synergy.XPS and CO-DRIFTS analyses indicated that Pt loading reduced the electron density of oxygen species,thereby strengthening metal-acid interactions.This work provides a catalyst design strategy for the efficient and directional conversion of n-hexane.关键词
正己烷/催化裂解/Pt/ZSM-5/金属有机固相合成法Key words
n-hexane/cracking/Pt/ZSM-5/metal-organic solid-phase synthesis分类
化学化工引用本文复制引用
薛登荣,刘瑞林,冯忠杰,覃勇,张斌..脱铝H-ZSM-5表面Pt颗粒密度调控及其己烷裂解性能研究[J].燃料化学学报（中英文）,2025,53(12):1789-1797,9.基金项目
The project was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB1190000),the National Key R&D Program of China(2020YFA0210902),the Youth Innovation Promotion Association CAS(Y2021056),the financial support from the National Natural Science Foundation of China(22072172,22202227,22302222),Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(YLU-DNL Fund 2022007),the Special Fund for Science and Technology Innovation Teams of Shanxi Province(202304051001007).中国科学院战略性先导科技专项(XDB1190000),国家重点研发计划(2020YFA0210902),中国科学院青年创新促进会(Y2021056),国家自然科学基金(22072172,22202227,22302222),中国科学院洁净能源创新研究院-榆林学院联合基金(YLU-DNL Fund 2022007)和山西省科技创新人才团队专项基金(202304051001007)资助 （XDB1190000）
