Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (11): 2475-2480.doi: 10.3866/PKU.WHXB201310101

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles    

Design, Synthesis and Characterization of Pt/Fe Bimetallic Fischer-Tropsch Catalyst

CAO Chong-Jiang1,2, LIU Xiao-Geng1, JU Xing-Rong1, CHEN Xiao-Rong3   

  1. 1 Department of Applied Catalysis, Nanjing University of Finance and Economics, Nanjing 210046, P. R. China;
    2 Department of Chemical Engineering, University of Illinois, Chicago, IL 60607, USA;
    3 College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, P. R. China
  • Received:2013-07-29 Revised:2013-10-08 Published:2013-10-30
  • Contact: CAO Chong-Jiang E-mail:ccj33@163.com
  • Supported by:

    The project was supported by the National Key Technology R&D Program of the Ministry of Science and Technology, China (2011BAD03B02).

Abstract:

An efficient method for preparing highly dispersed bimetallic catalysts is described based on the different Point Zero Charges of Fe2O3 and SiO2. The strong electrostatic adsorption (SEA) technique was applied to the preparation of Pt-promoted Fe/SiO2 by driving the Pt precursor onto the Fe2O3 phase instead of the silica support. Characterization of the samples was carried out using N2 adsorptiondesorption, X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), and energy dispersive X-ray spectroscopy (EDS). The results showed that the SEA method can control the uptake of Pt onto the transition metal oxide instead of silica, forming tight coupling between the Pt and transition metal after reduction. Compared with the incipient wetness (IW) method, the SEA technique produced more intimately designed bimetallic particles with small, uniform distribution after reduction. The particle size is about 2 nm. From Fischer-Tropsch (F-T) reaction, the catalyst using SEA shows higher F-T activity and stability. The conversion is more than 51% after 150 h on the stream.

Key words: Strong electrostatic adsorption, Catalyst, Fischer-Tropsch synthesis, Iron oxide, Silica

MSC2000: 

  • O641