What do EOR and SOR mean in a hydrogenation reactor?
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What do EOR and SOR mean in hydrogenation reactors (such as the C2 hydrogenation reactor in the ethylene separation process)? Thank you all
SOR stands for Start of Run, while EOR stands for End of Run; I believe these terms are applicable to hydrogenation catalysts. Typically, SOR is lower than EOR.
Yes, SOR should be lower than EOR. Because hydrogenation is an exothermic reaction, haha
Are the high and low levels discussed by the two referring to the temperatures at the beginning and end of the reaction?
Yes. In the early stage of the reaction, the catalyst has high activity, so a lower SOR is sufficient to meet the process requirements. At the end of the reaction, coking occurs on the catalyst surface, leading to a decrease in its activity and selectivity; in such cases, it is necessary to increase the reaction temperature to compensate for this.
Initial and final operating conditions are often specified for the process materials. It is denoted by SOR and EOR.
SOR: START OF REACTION EOR: END OF REACTION
SOR=start of running EOR=end of running
SOR refers to the initial stage of operation of a new catalyst; during this period, the catalyst’s activity is relatively high and the reactions are intense. Therefore, it is necessary to control the reaction temperature at a low level to prevent excessive temperature rises； EOR refers to the end stage of operation of an old catalyst. By this point, the catalyst has been in use for nearly one cycle, and its reaction activity has decreased; therefore, it is necessary to increase the reaction temperature in order to maintain the activity required for production. As a result, the temperature is relatively high at this stage. However, if the temperature distribution within the catalyst bed is uneven, with radial temperature differences existing, and if the maximum operating temperature of the reactor is reached, it becomes necessary to stop operations, replace the catalyst, or carry out catalyst regeneration.
I learned something new; I didn’t understand the difference before
At the end and beginning of the reaction, the catalyst’s activity decreases; therefore, the EOR temperature is controlled at a higher level than that in SOR