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Particle size control effect on activity and selectivity of functionalized CNT-supported cobalt catalyst in Fischer-Tropsch synthesis

  • Catalysis, Reaction Engineering
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Abstract

The influence of cobalt particle size on catalyst performance in Fischer-Tropsch synthesis (FTS) has been investigated using functionalized carbon nanotube (CNT)-supported nano catalyst. The catalysts were synthesized by wet impregnation and special sol-gel technique. The catalysts were characterized by BET, XRD, H2 chemisorption, TPR, and TEM. According to TEM analysis, small Co particles (3–8 nm) synthesized by sol-gel technique have very narrow particle size distributions and are mostly confined inside the CNT. The deposition of cobalt nanoparticles synthesized by sol-gel technique on the functionalized CNT shifted the reduction peaks to a low temperature, indicating higher reducibility for uniform cobalt particles. The proposed sol-gel technique increased the FTS rate from 0.62 to 0.71 g HC/gcat./h, C +5 selectivity increased 7% and CH4 selectivity decreased 4%, compared to that prepared by incipient wetness impregnation. This new catalyst preparation method may offer an attractive alternative for nanoparticles synthesis with uniform, and various size distributions.

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Authors and Affiliations

  1. Chemical Engineering Department, Amir Kabir University of Technology, 424 Hafez Ave., Tehran, 15875-4413, Iran

    Ali Karimi & Bahram Nasernejad

  2. Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran

    Ali Karimi & Ali Morad Rashidi

Authors
  1. Ali Karimi
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  2. Bahram Nasernejad
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  3. Ali Morad Rashidi
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Correspondence to Bahram Nasernejad.

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Karimi, A., Nasernejad, B. & Rashidi, A.M. Particle size control effect on activity and selectivity of functionalized CNT-supported cobalt catalyst in Fischer-Tropsch synthesis. Korean J. Chem. Eng. 29, 1516–1524 (2012). https://doi.org/10.1007/s11814-012-0062-8

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  • DOI: https://doi.org/10.1007/s11814-012-0062-8

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