Selective Hydrogenation of the SteamcrackerPCH/HYDVAPO-E

Who should attend?

  • To improve the knowledge of the selective hydrogenation processes of C2, C3, C4 cuts and pyrolysis gasolines for better control of their operation.
Audience :
  • Operating personnel of the steam cracker manufacturing units: experienced operators, panel operators, chief operators and all technicians concerned with the operation of these sections.

Level : Proficiency

Course Content

  • SELECTIVE HYDROGENATION OF THE C2 CUT

      • Origin, characteristics and valuation of the C2 cut: origin and state of availability of the cut, average composition, specifications of ethylene produced.
      • Demonstration of the impurity to be removed. Choice of the implementation of the treatment in relation to the nature of the impurity.
      • Situation and operating principle of the selective hydrogenation section within the steam cracker: arrangement of the reactors, characteristics of the reactions involved in the process, induced stresses.
      • Nature, properties and mechanism of action of the catalyst: typical composition, activity, selectivity, main steps of the catalytic act, main well-known poisons (carbon monoxide, hydrogen sulfide, green oils...).
      • Analysis of the operating conditions: detailed diagram of the installation (regulations implemented, standard operating conditions, available analyzers) - Conduct parameters (composition of the feedstock and hydrogen-rich gas, associated flow rates, CO content, molar ratio H2/C2H2, pressure, start-up temperature and Δt of the reactor...) - Performance monitoring (conversion rate, ethylene gain) - Analysis of the control views of the digital operation and related modules.
      • Case studies of adjustment: materialization of the evolution of the process using defined steps according to the variation of operating variables - Possible optimization points.
      • Possible major incidents, process safety and attached procedures.
  • SELECTIVE HYDROGENATION OF THE C3 CUT

      • Origin, characteristics and valuation of the cut C3: origin and state of availability of the cut, average composition, specifications of the propylene produced.
      • Demonstration of the impurities to be removed. Choice of the implementation of the treatment in relation to the nature of the impurities.
      • Description of the main differences between the selective hydrogenation of the C2 section and that of the C3 section: positioning of the section, reactions involved, catalyst.
      • Diagram of the installation, operating conditions, driving parameters, performance monitoring, digital driving overviews and associated modules.
      • Case studies on the tuning of the unit: evolution of the process further to the modification of operating variables according to reference adjustments - Possible optimization points.
      • Possible major incidents, process safety and associated procedures.
  • SELECTIVE HYDROGENATION OF THE C4 CUT

      • Origin, characteristics and valuation of the cut C4: origin and state of availability of the cut, average composition, specifications of the butadiene 1-3 produced.
      • Demonstration of the impurities to be removed, associated constraints - General diagram of the installation.
      • The main differences between the selective hydrogenation of the C4 cut and those of the C2 and C3 cuts.
      • Operating conditions and performances.
      • Process safety and associated procedures.
  • TREATMENT OF PYROLYSIS GASOLINES BY HYDROGENATION

      • Origin, characteristics and valuation of the C5+ cut: provenance and state of availability of the cut, average composition.
      • Demonstration of the impurities to be eliminated, associated constraints - General diagram of the installation.
      • Selective Hydrogenation 1st stage.
      • Types of catalysts according to the content and nature of the sulfur compounds of the feedstock.
      • Operating conditions and performance measurement.
      • Process security and associated procedures.
      • Hydrogenation 2nd stage.
      • Role of section.
      • Types of catalysts.
      • Operating conditions and performance.

Learning Objectives

  • Upon completion of the course, the participants will be able to:
  • justify the importance of these sections,
  • explain the meaning of the main operating parameters of these processes and the influence of the operating variables.

Ways & Means

  • Case studies handled in groups, based on typical situations of conduct of the sections studied.
  • Possible intervention of an operator reporting his industrial experience of the operation on a daily basis.