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<p>Based on the analytical and numerical analysis of the reaction-diffusion equation with a nonlinear reaction term, it is shown that the derivation of the concentration dependence of the effectiveness factor (ratio between the process rate under internal diffusion limitations and the intrinsic process rate) allows discriminating of a rate-determining step of a heterogeneous catalytic process that follows Langmuir–Rideal mechanism. The applicability of this approach is demonstrated for the identification of the rate-determining step for the process of methanol dehydration over alumina.</p>

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Discrimination of a Rate-Determining Step for a Process that Follows Langmuir–Rideal Mechanism

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • O. O. Zhokh,
  • A. I. Trypolskyi,
  • P. E. Strizhak

摘要

Based on the analytical and numerical analysis of the reaction-diffusion equation with a nonlinear reaction term, it is shown that the derivation of the concentration dependence of the effectiveness factor (ratio between the process rate under internal diffusion limitations and the intrinsic process rate) allows discriminating of a rate-determining step of a heterogeneous catalytic process that follows Langmuir–Rideal mechanism. The applicability of this approach is demonstrated for the identification of the rate-determining step for the process of methanol dehydration over alumina.