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Petroleum Science >2013, Issue 2: 242-250 DOI: https://doi.org/10.1007/s12182-013-0273-6

Hydroisomerization performance of platinum supported on ZSM-22/ZSM-23 intergrowth zeolite catalyst Open Access

文章信息

作者：Chi Kebin,Zhao Zhen,Tian Zhijian,Hu Sheng,Yan Lijun,Li Tianshu,Wang Bingchun,Meng Xiangbin,Gao Shanbin,Tan Mingwei and Liu Yanfeng

作者单位：

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China; Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China;Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China;Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China;Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China;Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China;Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China;Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China

投稿时间：2012-08-26

引用方式：Chi, K., Zhao, Z., Tian, Z. et al. Pet. Sci. (2013) 10: 242. https://doi.org/10.1007/s12182-013-0273-6

文章摘要

Hydroisomerization catalysts Pt/ZSM-22, Pt/ZSM-23, and Pt/ZSM-22/ZSM-23 were prepared by supporting Pt on ZSM-22, ZSM-23, and intergrowth zeolite ZSM-22/ZSM-23, respectively. The typical physicochemical properties of these catalysts were characterized by X-Ray Diffraction (XRD), N₂ absorption-desorption, Pyridine-Fourier Transform Infrared (Py-FTIR), Transmission Electron Microscopy (TEM), X-Ray Fluorescence (XRF), Scanning Electron Microscopy (SEM) and NH₃-Temperature Programmed Desorption (NH₃-TPD), and the performance of these catalysts in n-dodecane hydroisomerization was evaluated in a continuous down-flow fixed bed with a stainless steel tubular reactor. The characterization results indicated that the intergrowth zeolite ZSM-22/ZSM-23 possessed the dual structure of ZSM-22 and ZSM-23, and the catalyst Pt/ZSM-22/ZSM-23 had similar pores and weak acidity to Pt/ZSM-22 and Pt/ZSM-23 catalysts. Moreover, Pt/ZSM-22/ZSM-23 catalyst showed a high selectivity in hydroisomerization of long chain n-alkanes to mono-branched isomers. The evaluation results for n-dodecane hydroisomerization indicated that the activity of Pt/ZSM-22/ZSM-23 was the lowest, while the hydroisomerization selectivity was the highest among the three catalysts. The maximum yield of i-dodecane product was 68.3% over Pt/ZSM-22/ZSM-23 at 320 ^oC.

关键词

ZSM-22/ZSM-23 intergrowth zeolite, platinum catalyst, n-dodecane, hydroisomerization