H2S Removal & Sulfur Recovery ProcessesRAF/PFCS-E

Who should attend?

  • This course provides a deeper understanding of the operation and the monitoring, including HSE considerations, of common processes for elimination of H2S and for sulfur recovery.
Audience :
  • Engineers and supervisors involved in operating, troubleshooting, optimizing or revamping sour gas treatment and sulfur recovery facilities.

Level : Proficiency

Course Content


      • Amine washing and sulfur recovery units role in refineries.
      • Nature, origins and compositions of the streams to be treated, ammonia content.
      • Determination of the sulfur balance for a typical refinery.
      • Environmental aspects, treatment justification.

      • Chemical reaction between amines and H2S.
      • Process flow sheet and equipment review: absorption, regeneration, pumps and filtration.
      • Process control: pressures, temperatures, amine solution optimization, steam flowrate to regenerator optimization.
      • Regeneration quality: objectives, follow-up methods, and performance impacts.
      • Troubleshooting: amine solution degradation, foaming, corrosion, washing quality follow-up.
      • Safety issues.
      • Application: what you can learn from your amine analysis (routine and detailed).

      • Chemical reactions: required and undesired ones, thermodynamics and kinetics.
      • Process flow sheet: thermal stage, catalytic stage, sulfur recovery, tail gas incineration. Operating parameters and impact on sulfur yield.
      • Process control: H2S/SO2 ratio control, air flowrate optimization, tail gas analyzer, warming up techniques and temperature control at the converters.
      • Troubleshooting: hydrocarbons presence, sulfur behavior as per temperature, H2S degassing from sulfur product, safety.
      • Shutdown situations and consequences, safety issues, ISS.
      • Use of a dynamic simulator to illustrate the impact of parameter changes.

      • Process flow schemes: sub-dewpoint Claus or amine route.
      • Operating parameters and impact on process and sulfur yields.
      • Influence of the H2S/SO2 ratio.
      • Sources of usual operation troubles for each process: improper regeneration, catalyst ageing…
      • Impact on the CLAUS unit optimization.

      • Sour water characteristics. Ammonia content. Ammonia conversion and NOx monitoring.
      • Principle, main equipment, operating parameters, water quality follow-up.

Learning Objectives

  • Upon completion of the course, the participants will be able to:
  • know about the chemistry, technologies and safety and environmental issues of hydrogen sulfide removal from refinery gas streams,
  • analyze the operating parameters of an H2S conversion train and their impact on NOx and SOx emissions,
  • avoid the most common deficiencies by applying preventive measures.

Ways & Means

  • Use of a dynamic simulator for amine and Claus units to simulate operating conditions.