Light Gasoline Isomerization


Who should attend?

  • This course provides a thorough understanding of various isomerization processes and how to optimize the operation of this unit, particularly the reaction and recycle sections.
Audience :
  • Engineers, senior operation personnel or technical supervisory staff interested or involved in the operation, optimization and monitoring of octane boosting processes.
  • Engineers from research centers and engineering companies involved in the different aspects of the operation and process control of these units.

Level : Proficiency

Course Content


      • Quality specifications of gasolines, reformulated gasoline and future trends.
      • Role of isomerate in the octane pool.
      • Comparison of different types of isomerization processes and performances, integration within the refining processes.
      • Feedstock and product properties, minimum benzene schemes.

      • Review of the characteristics of the chemical reactions. Thermodynamics and kinetics considerations for optimization of the yield.
      • Characteristics of the different generations of catalysts. Contaminants and poisons, consequences on the process arrangement. Operating precautions.

      • Process flow and parameters of an isomerization unit, for the three main categories of catalysts.
      • Material balance.
      • Operating variables: temperature and temperature profile, difference of temperature, H2/HC ratio, flow rates, feed and make-up gas characteristics, recycle flow rates.

      • Unit operation: influence of operating variables on performance catalyst activity monitoring.
      • Operation of the separation sections (deisohexanizer, molecular sieves, etc.) and monitoring of the recycle of the paraffins with low octane number.
      • Optimization criteria. Maximizing the performances of the unit under limit conditions.
      • Case studies - Disturbances: diagnosis, causes and remedies (RON decrease, moisture in the feed, high benzene in the feed, sulfur peak, chlorine peak, recycle or separation issues).
      • Reactor temperature run-off.
      • Main steps of start-up and shutdown.

Learning Objectives

  • Upon completion of the course, the participants will be able to:
  • assess the influence of operating parameters on a unit performance through an analysis of the catalyst's activity,
  • detect potential deficiencies by troubleshooting,
  • acquire the best practices for unit start-up, normal operation and shutdown.

Ways & Means

  • Applications, teamwork, case studies and interactive workshops based on typical real situations.