Gas Purification with PSARAF/PPSA-E

Who should attend?

  • This course provides a comprehensive understanding of the operating of PSA gas purification units.
Audience :
  • Engineers, shift leaders, panel operators and technical staff interested or involved in the purification of hydrogen by means of PSA (Pressure Swing Adsorption).

Level : Proficiency

Course Content

  • PRINCIPAL FEATURES OF PSA CYCLES

      • Principles of gas adsorption on different solids called adsorbents.
      • Breathing capacity of an adsorbent and related limits.
      • Dynamic phenomena of adsorption and gas response.
      • Multi-beds units, cyclic adsorption/desorption and steps of a PSA process.
  • DETAILED STUDY OF PSA CYCLES

      • Representation of a PSA cycle: graphical or tabular.
      • Phase time and cycle time of a PSA.
      • Gas circulation from and to adsorbers for each step of the cycle.
      • Application: cycles study of a PSA unit operated by the participants.
  • DEFINITION OF OPERATING PARAMETERS

      • Separation yield and productivity of a PSA unit.
      • Influence of the different pressure levels on the cycle.
      • Purity-performance relationship, parameters for follow-up.
      • Application: study of PSA units operated by the participants.
  • PSA OPERATION & RELIABILITY

      • Good operational practice to increase the reliability of an industrial PSA.
      • Critical follow-up on the control display and anticipating actions.
      • Operational drift: leaking valve, progressive drop of purity, loss of production; identification of the causes and remedies.
      • Transition conditions to a lower mode or to shutdown.
      • Application: workshop related to operation with typical case studies.
  • START-UP STEPS

      • Typical start-up procedures and start-up conditions.
      • Related risks and precautions.
  • SWITCH OVER TO LOWER MODES

      • Transition from normal mode to lower modes and back.
      • Description of a lower mode due to failure of an adsorber or of a valve-set, optimization of lower modes, diagnosis and solutions.
      • Transition steps and related cycles. Impact on the production.
      • Application: case studies related to operation of lower modes.
  • SAFETY & RISKS ASSOCIATED TO HYDROGEN PSA

      • Pressure vessels, containment, ATEX risks.
      • Loading and unloading of adsorbents.

Learning Objectives

  • Upon completion of the course, the participants will be able to:
  • know about PSA cycles and how gas flows between adsorbers,
  • grasp the essence of possible methods for improving operational reliability,
  • investigate how to switch to lower modes and operation within those modes,
  • understand the safety issues and operating risks involved in this process.