Technology Unit

PRS also includes a Low-Pressure Catalyst Conditioning Section to enable Catalyst Replacement and Activation independently without affecting Normal Operations. During the Run, pressure drop in R1A increases and the Catalyst deactivates. When constraint limits are attained, R1A is isolated from RDS Operation, cooled and
depressurized. Spent Catalyst is discharged, then Fresh Catalyst is loaded and activated before R1A is put back on-line in the Lag Position. During the Change-Out Period, R1B operates alone, and maintains high HDM Activity.