Journal
PROGRESS IN REACTION KINETICS AND MECHANISM
Volume 39, Issue 2, Pages 137-150Publisher
SAGE PUBLICATIONS LTD
DOI: 10.3184/97809059274714X13874723178322
Keywords
Fischer-Tropsch synthesis; iron-based catalyst; water-gas shift reaction; size-dependent kinetics
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Funding
- Ferdowsi University of Mashhad, Iran [2/26310-11/2/92]
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The effect of nanoparticle size on the kinetics of the water-gas-shift (WGS) reaction using an iron based catalyst used in the Fischer-Tropsch synthesis (FTS) was studied in a continuous spinning basket reactor. A series of iron oxide particles with different particle sizes doped with copper and lanthanum was prepared as the catalyst. A new size-dependent kinetic model for the WGS reaction has been developed by a thermodynamic method. The kinetic parameters of the model were evaluated from experimental results for iron catalysts with different particle sizes. The results show that the parameters of the size-dependent model changed with temperature and particle size. The surface tension energy (sigma) of the iron oxide catalyst and the size-independent activation energy for the WGS reaction was calculated from the experimental results. The size-independent activation energy for the WGS reaction is calculated as 4 kJ mol(-1) based on haematite particles.
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