Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (7): 20250011.doi: 10.7503/cjcu20250011

• Physical Chemistry • Previous Articles     Next Articles

Synthesis of the PtxZn/MSN Catalysts and Their Propane Dehydrogenation Properties

WANG Wenxin1, SHAN Yiou1, SONG Jiaxin1, FAN Xiaoqiang1(), YU Xuehua1, KONG Lian1, XIAO Xia1, XIE Zean1, ZHAO Zhen1,2()   

  1. 1.Institute of Catalysis for Energy and Environment,College 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:2025-01-10 Online:2025-07-10 Published:2025-03-05
  • Contact: FAN Xiaoqiang E-mail:fanxiaoqiang1986@126.com;zhenzhao@cup.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22172101);the Applied Basic Research Program of Liaoning Province, China(2023JH2/101600059);the Liaoning Xingliao Talented Youth Top Talent Program, China(XLYC2203138);the Fundamental Research Funds for Liaoning Universities, China(LJ212410166046);the Major Incubation Program of Shenyang Normal University, China

Abstract:

With the increasing demand of propylene in society, the development of efficient propylene production technology is crucial for both science and the economy. Platinum-based catalysts have been widely studied in propane dehydrogenation(PDH) reactions due to their high ability to activate propane C—H bonds and selectivity towards propylene. In this work, mesoporous silica nanoparticles(MSN) with confinement effect were used as the support, and transition metal zinc was selected as a promoter to control the electronic properties and geometric structure of platinum. PtxZn/MSN catalysts with different zinc loadings were prepared by the impregnation method and the products were characterized by X-Ray diffraction(XRD), N2 adsorption-desorption, Raman spectra, CO diffuse reflective infrared Fourier transform spectroscopy(CO-DRIFT), scanning electron microscope(SEM), transmission electron microscope(TEM) and X-ray photoelectron specroscopy(XPS). the PDH performance of PtxZn/MSN was tested. When the zinc loading was 0.5%(mass fraction), PtxZn/MSN catalyst showed the highest PDH activity with the initial propane conversion and propylene selectivity of 47.9% and 97.0%, respectively. After 6 h reaction, the propane conversion and propylene selectivity were 45.8% and 97.0%, with the propylene production rate of 0.82 mmol/min·gcat. The characterization results demonstrated that the addition of Zn divided Pt particles into smaller Pt species, which can improve the dispersion of Pt, reduce the occurrence of side reactions, and enhance the stability of the catalyst.

Key words: Pt-based catalyst, Transition metal Zn promoter, Mesoporous silica nanoparticles, Propane dehydrogenation, Propylene

CLC Number: 

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