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Gas Purification with PSA

2 days RAF/PPSA-E
  • Engineers, shift leaders, panel operators and technical staff interested or involved in the purification of hydrogen by means of PSA (Pressure Swing Adsorption).
  • To provide a comprehensive understanding of the operating of PSA gas purification units.
Learning Objectives
  • To learn about PSA cycles and how gas flows between adsorbers.
  • To grasp the essence of possible methods for improving operational reliability.
  • To investigate how to switch to lower modes and operation within those modes.
  • To understand the safety issues and operating risks involved in this process.

Principal features of PSA cycles 0.25 day
  • 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 0.25 day
  • 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 0.25 day
  • 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 and reliability 0.5 day
  • 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 shut down.
  • Application: workshop related to operation with typical case studies.
Start-up steps 0.25 day
  • Typical start-up procedures and start-up conditions.
  • Related risks and precautions.
Switch over to lower modes 0.25 day
  • 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 and risks associated to hydrogen PSA 0.25 day
  • Pressure vessels, containment, ATEX risks.
  • Loading and unloading of adsorbents.