Abstract
The reaction mechanism for catalytic pyrolysis of C4 hydrocarbons on a modified ZSM-5 catalyst was analyzed. With the overall reactants and products classified into six species, a 6-lump kinetic model was established to describe the reactions with appropriate assumption. Rate constants of the kinetic model at 480, 500, 530, and 560 °C were estimated by a nonlinear least-squares regression method. Pre-exponential factors and apparent activation energies were then calculated according to the Arrhenius equation. The 6-lump kinetic model showed good prediction performance, with predicted yields close to the experimental ones. The variation in ethene and propene yields with reaction temperature and the weight hourly space velocity of C4 hydrocarbons were predicted using the lump model as basis.
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