Hydrotreatment ProcessesRAF/HDTS-E

Who should attend?

  • This course provides a better understanding of the operation of hydrotreatment units and helps participants to be better prepared to deal with disturbed situations.
Audience :
  • Shift leaders, panel operators and experienced operators in charge of the operation of hydrotreatment units.

Level : Proficiency

Course Content


      • Main process scheme, operating circuits, main pieces of equipment, control systems.
      • Characteristics of the streams, operating conditions.
      • Significance of the process parameters of the units: mass balances, temperatures, pressures, recycle flow rates, amine washing efficiency, recontacting system.
      • Profile of important parameters along the unit (pressure, temperatures).
      • Analytical survey.

      • Each operating parameter impact on operation is illustrated thanks to simulator handlings.
      • Reactor temperatures, pressure drop and H2 partial pressure, recycle rate, quench ratio, recontacting ratio…
      • Feed composition according to origins of constituents.
      • Severity of different processes according to feed and products specifications.
      • Protection of the catalyst along a run.
      • Give away and how to avoid it.
      • Optimization of stripping and drying operation.

      • Risks and hazards related to the process.
      • Safety and ESD system.
      • Operating deviations:
      • Feed or hydrogen composition change.
      • Amine washing failure, heater failure.
      • Make-up gas or recycle gas compressor failure, feed pump failure.
      • Start-up procedures: main steps and explanation of the role of each step.

Learning Objectives

  • Upon completion of the course, the participants will be able to:
  • monitor the operation and optimization of the steady state operation of the HDT unit,
  • understand the phenomenons involved in deviations or troubles,
  • react in the correct direction to restabilize the unit.

Ways & Means

  • Each case study is covered by handling using a high fidelity simulator, following several steps:
  • objective of the case study, action by the trainees: operation/settings, stabilization,
  • analysis of the evolution of operating parameters up to the final state ; mass balance, ratios, performance,
  • consequences for operation strategies.