Figure 1.

Simplified process flow diagram for catalytic conversion of H₂S to elemental sulfur (1, H₂S cylinder; 2, O₂cylinder; 3, bomb; 4, gas inlet; 5, absorber/regenerator; 6, outlet gas checking port; 7, sulfur recovery; 8, gas inlet; 9, NaOH scrubber; 10, sweet gases; V1–V9, valves)