Applying Reaction Kinetics to Pseudohomogeneous Methanation Modeling in Fixed‐Bed Reactors,Chemical Engineering & Technology

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Applying Reaction Kinetics to Pseudohomogeneous Methanation Modeling in Fixed‐Bed Reactors
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-04-15 , DOI: 10.1002/ceat.201900535
Valentin Scharl ₁ , Felix Fischer ₁ , Stephan Herrmann ₁ , Sebastian Fendt ₁ , Hartmut Spliethoff _{1,

2}

Affiliation

Reactor simulations can reduce the effort when designing fixed‐bed reactors for methanation processes. Several microkinetic models were developed under a variety of operating conditions. However, most production‐scale fixed‐bed methanation processes exceed the temperature range in which these kinetic models were obtained. In addition, heat and mass transport limitations strongly influence the reaction kinetics. In this work, microkinetic rate equations for CO and CO₂ methanation were analyzed with respect to their suitability for high‐temperature, pseudohomogeneous reactor modeling. The best‐suited kinetic model was fitted to the operating conditions and validated by means of CFD simulations. It is shown that the simulations match the experimental data for various operating conditions.

中文翻译：

将反应动力学应用于固定床反应器的伪均相甲烷化模型

在为甲烷化过程设计固定床反应器时，反应器模拟可以减少工作量。在各种操作条件下开发了几种微动力学模型。但是，大多数生产规模的固定床甲烷化过程都超出了获得这些动力学模型的温度范围。另外，热量和质量传输限制强烈影响反应动力学。在这项工作中，分析了CO和CO ₂甲烷化的微动力学速率方程，考虑了它们在高温，伪均相反应器建模中的适用性。最合适的动力学模型适合运行条件，并通过CFD模拟进行了验证。结果表明，模拟与各种操作条件下的实验数据相匹配。

更新日期：2020-04-15

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