丙烷脱氢是目前制备丙烯较有前景的工艺，其中研制高性能催化剂是该工艺的关键。目前采用的Pt系催化剂存在制备成本高昂、高温反应易造成积碳和颗粒烧结等问题。本项目拟以树枝状KCC-1纳米材料为载体，利用氨基功能化与超声辅助原位生长技术，制备金属氧化物粒径、分散度和固载量稳定可控的VOx/KCC-1纳米材料，再利用分子筛对金属氧化物封装效应，结合原位刻蚀技术，构筑金属氧化物限域生长的多级孔SSZ-13封装VOx催化剂，实现同时调控表面性质和金属氧化物活性位的目标。基于对多级孔VOx@SSZ-13催化剂性质表征和性能评价结果，分析催化剂孔道结构、表面酸性和金属氧化物粒径、分散度、封装量和金属原子表面密度等因素对表面积碳速率、积碳量和活性金属氧化物烧结程度的影响规律，揭示催化剂表面性质和分子筛限域效应与催化性能之间的构效关系，为设计双效抗烧结、抗积碳丙烷脱氢催化剂提供理论基础和科学依据。

Propane dehydrogenation has been regarded as an optimal way for the production of propylene, in which the key is to develop a high performance catalyst. Impressive progress has been made in the propane dehydrogenation for Pt catalysts, however, there are also some problems, such as high-cost preparation process, carbon deposition and metal sintering. In this project, amino-functionalization and ultrasonic assisted in-situ growth technology will be associated to be used to prepare dendritic VOx/KCC-1 with controllable particle size, dispersion and leaching susceptibility of metal oxides. By combining the encapsulation of the metal oxide nanoparticles inside of zeoilte crystals and in-situ etching strategy, hierarchical SSZ-13 encapsulated VOx catalysts will be constructed to regulate the surface properties as well as the active sites of metal oxides. Based on the characterization and catalytic results of VOx@SSZ-13 catalysts, the effects of pore structures, surface acidities, metal oxide particle sizes, dispersions, loadings and metal atom surface densities on the coke formation and metal oxide sintering will be studied, and the structure-performance relationship of the catalyst surface properties and zeolite confinement effects with catalytic performance will be disclosed. It is reasonable to expect that this study could provide experimental and theoretical basis for the design of propane dehydrogenation catalyst with better ability of anti-sintering and coke inhibition.