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Area of Science:

  • Chemical Engineering
  • Thermodynamics
  • Process Intensification

Background:

  • Refining processes require efficient energy utilization.
  • Advanced exergy analysis identifies component-level improvement potentials.
  • Conventional gasoline absorption-stabilization processes (GASP) have room for optimization.

Purpose of the Study:

  • To propose and evaluate a new gasoline absorption-stabilization process (GASP) for enhanced energy utilization.
  • To apply advanced exergy analysis to compare conventional and new GASP designs.
  • To identify key components for exergy destruction reduction in the new GASP.

Main Methods:

  • Simulation of conventional and new GASP using PRO/II software.
  • Validation of simulations with actual plant operation data.
  • Application of advanced exergy analysis to quantify exergy efficiencies and destruction rates.

Main Results:

  • The new GASP achieved an exergy efficiency of 71.44%, compared to 65.04% for the conventional process.
  • Total exergy destruction rates decreased from 7.79 MW to 6.01 MW.
  • The air cooler for rich gas showed the highest potential for exergy destruction reduction in the new GASP, unlike the conventional process where the stabilizer dominated.

Conclusions:

  • The proposed new GASP demonstrates superior energy utilization compared to the conventional design.
  • Advanced exergy analysis is crucial for identifying specific optimization opportunities in refining processes.
  • Targeting the air cooler in the new GASP offers significant potential for further energy savings.