Modeling and Simulation of an Industrial Ethylene Oxide (EO) Reactor Using Artificial Neural Networks (ANN)

In the present work, a one-dimensional heterogeneous model was used for dynamic simulation of an industrial fixed-bed catalytic ethylene oxide (EO) reactor in the presence of long-term catalyst deactivation. In order to determine the level of optimum ethylene dichloride (EDC), a multilayer perceptron (MLP) neural network was used. In addition, the effect of inlet gas velocity on EO mole fraction of gas and solid phases was investigated. The model validation was carried out by comparison of model results with corresponding industrial conditions and over a period of three operating years. A good agreement was found between the simulation results of the dynamic model and historical process data. The error of simulation was found to be less than 5%. The results of the artificial neural network (ANN) modeling showed that the maximum selectivity occurs in the range of 0.37–0.42 ppm of EDC. Also, it was observed that with decrease of gas velocity the difference between the EO mole fraction of gas phase and solid...

[1]  Mohammad Reza Rahimpour,et al.  A comparison of co-current and counter-current modes of operation for a dual-type industrial methanol reactor , 2008 .

[2]  S. Chavadej,et al.  Catalytic activity of ethylene oxidation over Au, Ag and Au–Ag catalysts: Support effect , 2007 .

[3]  Sungwon Hwang,et al.  Heterogeneous catalytic reactor design with optimum temperature profile I: application of catalyst dilution and side-stream distribution , 2004 .

[4]  Wei-Kang Yuan,et al.  Optimization of the fixed-bed reactor for ethylene epoxidation , 2005 .

[5]  Behdad Moghtaderi,et al.  Operability of an industrial methanol synthesis reactor with mixtures of fresh and partially deactivated catalyst , 2005 .

[6]  N. Park,et al.  Partial oxidation of ethylene to ethylene oxide over nanosized Ag/α-Al2O3 catalysts , 2003 .

[7]  van Ra Rutger Santen,et al.  The mechanism of ethylene epoxidation , 1981 .

[8]  K. R. Westerterp,et al.  An experimental study of the kinetics of the selectivity oxidation of ethene over a silver on a-alumina catalyst , 1995 .

[9]  M. Khademi,et al.  A novel configuration for hydrogen production from coupling of methanol and benzene synthesis in a hydrogen-permselective membrane reactor , 2009 .

[10]  Mohammad Reza Rahimpour,et al.  Optimization of a novel combination of fixed and fluidized-bed hydrogen-permselective membrane reactors for Fischer–Tropsch synthesis in GTL technology , 2009 .

[11]  Manfred Baerns,et al.  Deactivation of a commercial catalyst in the epoxidation of ethylene to ethylene oxide—basis for accelerated testing , 2004 .

[12]  C. Campbell,et al.  Microkinetic modeling of ethylene oxidation over silver , 2004 .

[13]  Behdad Moghtaderi,et al.  A comparison of homogeneous and heterogeneous dynamic models for industrial methanol reactors in the presence of catalyst deactivation , 2005 .

[14]  Antonello Barresi,et al.  Methanol synthesis in a forced unsteady-state reactor network , 2002 .

[15]  M. Rahimpour,et al.  Co‐current and Countercurrent Configurations for a Membrane Dual Type Methanol Reactor , 2008 .

[16]  Enrico Tronconi,et al.  Simulation of structured catalytic reactors with enhanced thermal conductivity for selective oxidation reactions , 2001 .

[17]  Sandip Kumar Lahiri,et al.  Process modeling and optimization of industrial ethylene oxide reactor by integrating support vector regression and genetic algorithm , 2009 .

[18]  R. Ferreira,et al.  Reverse-flow reactor for a selective oxidation process , 1999 .

[19]  Mohammad Reza Rahimpour,et al.  Production of hydrogen from purge gases of ammonia plants in a catalytic hydrogen-permselective membrane reactor , 2009 .

[20]  H. Kordabadi,et al.  A pseudo-dynamic optimization of a dual-stage methanol synthesis reactor in the face of catalyst deactivation , 2007 .

[21]  M. Rahimpour,et al.  Enhancement of Methanol Production in a Membrane Dual‐Type Reactor , 2007 .

[22]  M. Rahimpour,et al.  A comparison of auto-thermal and conventional methanol synthesis reactor in the presence of catalyst deactivation , 2008 .

[23]  Majid Baniadam,et al.  Incorporation of Flexibility in the Design of a Methanol Synthesis Loop in the Presence of Catalyst Deactivation , 2003 .

[24]  Rubens Maciel Filho,et al.  Dynamic modelling of a three-phase catalytic slurry reactor , 2001 .

[25]  C. H. Bartholomew.  Mechanisms of catalyst deactivation , 2001 .

[26]  Abdolhossein Jahanmiri,et al.  Optimization of methanol synthesis reactor using genetic algorithms , 2005 .

[27]  Stavros Pavlou,et al.  ETHYLENE OXIDATION ON SILVER CATALYSTS: EFFECT OF ETHYLENE OXIDE AND OF EXTERNAL TRANSFER LIMITATIONS , 1986 .