Kinetic study of oxychlorination process
MetadataShow full item record
Doped CuCl2/Alumina is the catalyst for ethylene dichloride (C2H4CL2) production. Ethylene dichloride is the intermediate for generating polyvinyl chloride (PVC) and is produced as result of catalytic oxy-chlorination of ethylene (C2H4). The process of ethylene oxy-chlorination can be split to three steps on gamma-alumina support. The first step is reduction of cupric chloride which is actually ethylene chlorination step where the second and third steps are re-oxidation and Chlorination of cuprous chloride respectively, using O2 and HCL. Results obtained from oxychlorination of ethylene on CuCl2/G- Al2O3 catalyst, Showed a lower reaction rate on the second step than the first step which leads to deactivation of catalyst due to the excess amount of intermediate (CuCl). Therefore, CeO2 is used as promoter to enhance the catalytic performance of the reaction by reducing the reaction rate at first step in one hand and increasing the oxidation rate on the other hand. Various weight percentages of Ceria (1, 3 and 5 wt%) doped with CuCl2/G- Al2O3 is been used in several cycles. UV/VIS and Mass Spectroscopies, Combined with laboratory techniques, made it possible to have a good understanding in kinetic behavior of the active phase and effects of CeO2 as promoter for the catalyst. Results show that even low concentrations of ceria in CuCl2/G- Al2O3 can highly enhance catalytic performance of the catalyst however high concentration of CeO2 has negative impacts on activity of the catalyst.