不同方法合成Y沸石包覆Ru金属催化剂及其性能研究

Synthesis and Properties of Y Zeolite⁃Encapsulated Ru Metal Catalyst via Different Methods

杨江蒨 刘萌 葛思达 吴志杰

Jiangqian Yang Meng Liu Sida Ge Zhijie Wu

中国石油大学（北京） 重质油国家重点实验室 CNPC催化重点实验室，北京 102249

State Key Laboratory of Heavy Oil Processing，The Key Laboratory of Catalysis of CNPC，China University of Petroleum（Beijing），Beijing 102249，China

采用原位水热法、离子交换法、浸渍法制备了系列Y沸石包覆Ru金属催化剂，讨论了采用原位水热法合成过程中Ru金属的添加顺序及不同合成方法对沸石物性及催化性能的影响；采用XRD、XRF和SEM等方法表征了沸石的组成和结构性质；采用H2?TPR、H2?TPD、TEM、CO?IR和XPS等表征方法表征了沸石中Ru金属的存在状态；采用NH3?TPD和Py?IR表征了沸石的酸性质。结果表明，Ru金属的添加顺序对原位水热法合成的沸石影响较小；原位水热法合成的沸石包覆金属效果最好；在异丁烷异构化制正丁烷的反应中，所得Ru@HY?Si具有最高的异丁烷转化率及正丁烷选择性，在反应温度为673 K、质量空速为4 h-1时催化活性最佳。

A series of Y zeolite?encapsulated Ru metal catalysts were prepared by the in?situ hydrothermal method, ion exchange method,and impregnation method.The effects of the Ru metal introduction sequence during the in?situ hydrothermal synthesis process and the synthesis methods on the physical properties and catalytic performance were discussed.Methods including XRD, XRF,and SEM were used to characterize the composition and structure of samples, and the presence states of Ru metal in zeolite were characterized by H2?TPR,H2?TPD,TEM,CO?IR,and XPS.The acidity properties of the samples were characterized by NH3?TPD and Py?IR.The results indicate that the addition order of Ru metal has little effect on the zeolite synthesized by the in?situ hydrothermal method,and this method is the best choice for Ru metal encapsulation.For the isomerization of isobutane to n?butane, the prepared Ru@HY?Si exhibits the highest isobutane conversion and n?butane selectivity and optimal catalytic activity at 673 K with a mass space velocity of 4 h-1.

国家重点研究计划资助项目(2021YFA1501203);中国石油科技创新基金项目(2021DQ02?0702)

10.3969/j.issn.1006-396X.2022.05.004