Optimize operating parameters of absorbers/strippers in gas plants
Better recovery definition of C3s and C4s from gas absorber/stripper can lower costs
Several factors affect the recovery of C3s and
C4s in gas recovery refinery type plants, typically
found in delayed cokers, fluid catalytic cracking (FCC) and
other downstream gas
processing units. These factors include: flowrates, stream
compositions, pressures, recovery specifications, solvent
temperatures and volume of solvents required.1,2
Operating efficiency of the absorber/stripper gas plant section
also involves the amount of lean oil entering the secondary
absorber and the volume of stabilized naphtha recycled back to
the primary absorber.3,4 A sensitivity study was
done to optimize the design of an absorber/stripper gas plant
section to improve recovery of C3s and
C4s. Recovery targets of the evaluation are to be
based on balancing an assumed refinery sour gas streams with
liquefied petroleum gas (LPG) production while controlling both
capital investment and operating costs.
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