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Isomerization

2 days RAF/ISOM-E
Level
Proficiency
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.
Purpose
  • 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.
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.
Prerequisite
  • No prerequisites for this course.
Ways and means
  • Applications, teamwork, case studies and interactive workshops based on typical real situations.
Observation
Der Vortrag über dieses Thema kann auch auf Deutsch gehalten werden.

THE ISOMERIZATION PROCESS IN THE REFINERY OCTANE POOL 0.75 day
  • Quality specifications of gasolines, reformulated gasoline and future trends.
  • Octane improving processes, and place and 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.
ISOMERIZATION CHEMICAL REACTIONS & CATALYSTS 0.25 day
  • Review of the characteristics of the chemical reactions. Thermodynamics and kinetics considerations for optimization of the yield. Influence of the operating parameters and reactors arrangement.
  • Characteristics of the different generations of catalysts. Contaminants and poisons, consequences on the process arrangement. Operating precautions.
OPERATING PARAMETERS 0.25 day
  • 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 (H2 or low octane paraffins).
OPERATION & TROUBLESHOOTING 0.75 day
  • 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.
  • 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.