高等学校化学学报2024，Vol.45Issue(5)：28-37,10.DOI:10.7503/cjcu20240095
等级孔结构协同Fe改性提升ZSM-5分子筛催化苯甲醇烷基化性能
Synergistic Effects of Hierarchically Interconnected Porous Structure and Fe Modification on Zeolite ZSM-5 for Efficient Benzyl Alcohol Alkylation
摘要
Abstract
Constructing hierarchically porous structures and embedding metal species into zeolite frameworks can effectively enable fast diffusion and synergistic catalysis.We report a one-step synthesis method to synthesize hierarchically macro-meso-microporous zeolite ZSM-5 single crystals containing Fe metal nanoclusters,that has advantages compared to multistep methods such as impregnation and ion exchange.Zeolite ZSM-5-Fe catalysts were prepared by steam assisted crystallization with addition of hierarchically porous carbon template and a Fe precursor.The catalyst was systematically characterized by means of X-ray diffraction(XRD),ultraviolet-visible spectroscopy indicated that the isolated Fe(Ⅲ)located at ion exchange sites and ferrite octahedron(six-coordinate)were the main redox-active centers.At a loading amount(mass fraction)of 1%,the highest benzyl alcohol conversion rate reached 59.3%,with a product selectivity of 83.2%,and a final yield of 49.3%.The catalyst maintained high catalytic activity even after five cycles,demonstrating its remarkable stability.关键词
ZSM-5分子筛/等级结构/过渡金属铁/芳烃烷基化Key words
ZSM-5 zeolite/Hierarchical structure/Transition metal Fe/Aromatic alkylation分类
化学化工引用本文复制引用
宋宇航,刘湛,吕佳敏,余申,李小云,孙明慧,陈丽华,苏宝连..等级孔结构协同Fe改性提升ZSM-5分子筛催化苯甲醇烷基化性能[J].高等学校化学学报,2024,45(5):28-37,10.基金项目
国家重点研发计划项目(批准号:2022YFB3504000)、国家自然科学基金(批准号:22302152,U20A20122,22293020,U22B6011)和中央高校基本科研业务费专项资金(批准号:2024IVA090)资助. Supported by the National Key Research and Development Program of China(No.2022YFB3504000),the National Natural Science Foundation of China(Nos.22302152,U20A20122,22293020,U22B6011)and the Fundamental Research Funds for the Central Universities,China(No.2024IVA090). （批准号:2022YFB3504000）
