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Gas Purification with PSA

Gas Purification with PSA

2 days
RAF/PPSA-E
Sessions
This course is not scheduled.
Who should attend?

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
  • This course provides a comprehensive understanding of the operating of PSA gas purification units.
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.
Course Content

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 & 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 shutdown.
  • 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 & RISKS ASSOCIATED TO HYDROGEN PSA

0.25 day

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