276158 Ethylene Oxide Boosting in Oxygen-Assisted Membrane Reactor in Ethylene Epoxidation Process

Tuesday, October 30, 2012
Hall B (Convention Center )
Marzieh Shokrollahi Yancheshmeh, Mohammad R. Gholipour, Mohammad R. Rahimpour, Mitra Jafari, Davood Iranshahi and Sina Seifzadeh Haghighi, Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran


In this study, a novel configuration is proposed to boost the ethylene oxide production rate in ethylene epoxidation process. Regarding this, a packed bed reactor with Ag-csr-Al2O3 catalyst is studied as a one dimensional, homogenous model under steady state condition. A variety of rate equations is applied into the model and the optimization results of kinetic parameters show that this kinetic   is the most suitable one. The optimized kinetics' rates can predict industrial data with the maximum errors of 5.5%. In addition, initial concentrations of reactants decrease with the application of oxygen membrane where it can control reactants ratio which is exceedingly explosive. Furthermore, an appropriate distribution of oxygen along the reactor enhances the efficiency of final production so that the ethylene oxide increases significantly to 103%. Oxygen, transferring from air side to the reaction region, causes the remaining ethylene to react completely and produce much more ethylene oxide. Moreover, this oxygen transmission results in purifying air section from oxygen and reaching nitrogen mole fraction nearly 96%. Its temperature also rises dramatically from 300 K to 510 K. Furthermore, energy saving via this novel configuration is appealing from the economical viewpoint.

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See more of this Session: Poster Session: Membranes
See more of this Group/Topical: Separations Division