Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (3): 20240460.doi: 10.7503/cjcu20240460

• Physical Chemistry • Previous Articles     Next Articles

Preparation of Pt/Mn-silicalite-1 Catalysts and Their Catalytic Performance for Propane Dehydrogenation

LIU Yixuan1, HU Huimin1, FAN Xiaoqiang1(), YU Xuehua1, KONG Lian1, XIAO Xia1, XIE Zean1, ZHAO Zhen1,2()   

  1. 1.School of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China
    2.State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China
  • Received:2024-10-10 Online:2025-03-10 Published:2024-12-07
  • Contact: FAN Xiaoqiang E-mail:fanxiaoqiang1986@126.com;zhenzhao@cup.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22172101);the Liaoning Provincial Applied Basic Research Program, China(2023JH2/101600059);the Liaoning “Xingliao Talented Youth” Top Talent Program, China(XLYC2203138);the Fundamental Research Funds for the Liaoning Universities, China(LJ212410166046);the Major Incubation Program of Shenyang Normal University, China

Abstract:

As one of the important components of natural gas and shale gas, the catalytic conversion of propane not only has important theoretical research significance but also has broad prospects in application. Propane dehydrogenation is one of the important ways to enhance the production of propylene, and the key of this reaction is to improve the stability of Pt-based catalysts and minimize the amount of Pt. In this work, the Mn-doped silicalite-1(S-1) supports(xMn-S-1) with different Mn doping amounts were designed, and prepared a series of Pt/xMn-S-1 catalysts was prepared by loading Pt. The scanning electron microscope(SEM), X-ray diffraction(XRD), Raman spectra and ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS) characterizations were carried out, and the catalytic performance was tested for propane dehydrogenation. According to the characterizations, the Mn species enter the framework of S-1 to form Mn-O-Si by coordinating with EDTA, which can anchor the Pt species to form highly dispersed Pt species. According to the activity evaluation, Pt/0.05Mn-S-1 catalyst showed the best dehydrogenation performance with the propane initial conversion of 51.9%. And the propane conversion was 36.7% after 6 h reaction. The reason may be the strong interaction formed between the Mn-S-1 support and active metal Pt with the appropriate amount of Mn doping, which results in the enhanced propane dehydrogenation activity and stability over Pt/0.05Mn-S-1 catalyst.

Key words: Propane dehydrogenation, Propene, Mn-silicalite-1 support, Impregnation synthesis

CLC Number: 

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