Three-dimensional modeling of fluid catalytic cracking industrial riser flow and reactions
Three-dimensional modeling of fluid catalytic cracking industrial riser flow and reactions
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DOI：
10.1016/j.compchemeng.2010.12.014
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发表时间：
2011-11
期刊：
影响因子：
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通讯作者：
G. Lopes;L. M. Rosa;M. Mori;J. Nunhez;Waldir P. Martignoni
中科院分区：
文献类型：
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作者：
G. Lopes;L. M. Rosa;M. Mori;J. Nunhez;Waldir P. Martignoni
建立了一个预测流化催化裂化（FCC）工业反应器动态行为的三维两相流模型。该研究考虑了热传递和化学反应。提出了一个四集总模型来描述重油（瓦斯油）转化为汽油和轻烃气的催化裂化反应。反应器内的气体加速由于摩尔膨胀和模型来描述不希望的催化剂失活的焦炭沉积在其表面上也被认为是。欧拉描述的相位被用来表示两相流。使用商业CFD代码（Ansys CFX版本11.0）获得数值数据。在CFX代码中实现了适当的函数，以模拟非均相动力学和催化剂失活。结果表明，不均匀的趋势内的反应器，强调使用三维模型在FCC过程预测的重要性。
A three-dimensional and two-phase flow model to predict the dynamic behavior of a fluid catalytic cracking (FCC) industrial reactor was developed in this work. The study took into account heat transfer and chemical reactions. A four-lump model was proposed to represent the catalytic cracking reactions in which the heavy oil (gas oil) is converted into gasoline and light hydrocarbon gases. Gas acceleration inside the reactor due to molar expansion and a model to describe undesirable catalyst deactivation by coke deposition on its surface were also considered. An Eulerian description of the phases was used to represent the two-phase flow. A commercial CFD code (Ansys CFX version 11.0) was used to obtain the numerical data. Appropriate functions were implemented inside the CFX code to model the heterogeneous kinetics and catalyst deactivation. Results show nonuniform tendencies inside the reactor, emphasizing the importance of using three-dimensional models in FCC process predictions.