催化作用
煅烧
化学工程
材料科学
纳米颗粒
介孔材料
选择性
纳米晶
降水
环氧丙烷
多孔性
扩散
摩尔比
纳米技术
化学
有机化学
聚合物
复合材料
共聚物
物理
环氧乙烷
气象学
工程类
热力学
作者
Leilei Hou,Siyang Yan,Liping Liu,Jiaxu Liu,Guang Xiong
标识
DOI:10.1016/j.cej.2024.148676
摘要
The TS-1 microsphere was facilely prepared via a direct spray drying of the mixture containing the nanocrystal TS-1 and mother liquor. The calcined TS-1 zeolites possess a hollow structure and numerous intercrystalline mesopores, which may facilitate the diffusion properties. Au nanoparticles were loaded on TS-1 support by utilizing a deposition–precipitation process to prepare the Au/TS-1-M catalysts for propylene epoxidation in the presence of H2 and O2 conditions. The effects of the Ti and Au loadings on the structure, porosity, morphology, and catalytic performances of the Au/TS-1 catalysts have been investigated by various techniques. Under the optimized synthesis conditions (Si/Ti molar ratio = 57, 0.49 wt% Au), a propylene conversion of 6.1 % and a PO selectivity of 91.7 % are obtained on the Au/TS-1 catalyst. A PO formation rate of 186.8 gPO·kgcat.−1·h−1 was achieved at the 20th hour.
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