Sulphur Recovery


  • optimised process control
  • control of energy losses
  • high thermal insulation

Insulation for process optimisation & energy losses control

Environmental concerns about the sulphur content of natural gas and processed fuels are leading to tighter regulations and more stringent standards for sulphur emissions from petrochemical processing facilities. Acid gas emissions require purification. Hydrogen sulphide (H2S) is a by-product of processing natural gas and sulphur recovery refers to the conversion of this to elemental sulphur for recovery to reduce the hazardous sulphur emissions to limits permitted by national and local air quality requirements. 

The process starts by burning a proportion of the H2S with air in a reactor furnace operating at combustion chamber temperatures ranging over 1500 °C to form sulphur dioxide (SO2). Then, a series of two or more catalytic reactors operating at lower temperatures, ranging from 200 to 315 °C, complete the process. High temperatures and a demanding process require the very best insulation for process control optimisation and control of energy losses. 

For this equipment Promat HPI supply PROMATON® insulating firebricks and PROMACAST® and PROMACRETE® castables.  ALSIFLEX ALCEN® High Temperature Fibres (1600 °C) and PROMAPACK® sealing gaskets offer best insulating performance for critical areas of the Sulphur Recovery Unit (SRU). PROMAFORM® Pre-Fired Vacuum Formed Peephole Blocks are also available to complete the lining solutions for a typical fired heater.