Sulfur Recovery Units (SRU) from Air Liquide Engineering & Construction use a combustion and catalytic process to recover a pure form of sulfur from acid gas streams containing hydrogen sulfide. If credit is given for steam produced in the SRU, operating costs can be negligible.

Sulfur Recovery Units Usage:

Sulfur Recovery Units, also known as Claus Units, use a feedstock of acid gases from sweetening units and sour-water strippers. … The LTGTTM process, meanwhile, purifies the Claus tail gas through wet-scrubbing. By recycling the hydrogen sulfide rich stream to the unit, this method can raise sulfur recovery to 99.9%.