Modelling and Optimisation of an Industrial Ethylene Oxide Reactor
Modelling and Optimisation of an Industrial Ethylene Oxide Reactor
复制标题
工业环氧乙烷反应器的建模和优化
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
K. Ngian
中科院分区：
文献类型：
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作者：
Shahla Aryana;M. Ahmadi;V. Gomes;J. Romagnoli;K. Ngian
为了研究环氧乙烷（EO）反应器在银基催化剂上进行环氧化反应的性能，建立了工业填料床多管反应器的动力学模型。建立了以二氯乙烯（EDC）为慢化剂的催化氧化过程的非线性动力学速率方程和沿填料床的控制传热传质方程。催化剂失活建模为运行时间的非线性函数，并根据运行期间的工厂数据对方程进行基准测试。我们的过程模型与工业EO反应器的实验数据进行了比较。模型的预测结果与工厂的数据吻合得很好。考察了EDC水平、反应物浓度、反应器压力、冷却剂温度和进料温度等运行参数对反应器性能的影响。确定了对工作效率和选择性有显著影响的变量。利用该模型对环氧乙烷反应器的性能进行优化，使反应器的功率和选择性达到最大。
A dynamic model of an industrial packed-bed multi-tubular reactor was developed to investigate performance of an industrial ethylene oxide (EO) reactor, conducting epoxidation of ethylene over a silver-based catalyst. The set of nonlinear kinetic rate equations for the catalytic oxidation process in the presence of ethylene dichloride (EDC) as a moderator was coupled with the governing heat and mass transfer equations along the packed bed. Catalyst deactivation was modelled as a nonlinear function of operating time and the equation was benchmarked against plant data for the period of operation. Our process model was compared with experimental data obtained from an industrial EO reactor. The model predictions were found to agree well with the plant data. The influences of operating parameters such as EDC level, reactant concentrations, reactor pressure, coolant temperature and the feed temperature on reactor performance were investigated. The variables having significant impact on work rate and selectivity were identified. The model was used to optimise the performance of ethylene oxide reactor for maximising work rate and selectivity.