Homogeneous oxidation of SO in the tail gas incinerator of sulfur recovery unit.

The formation and emission of sulfur trioxide (SO) in sulfur recovery unit has received increasing attention due to its adverse effects on the operation of plant and environment. Due to the excess oxygen, high concentration of SO and high temperature, SO formation in the sulfur recovery unit tail gas incinerator may significantly increase. A small horizontal tube reactor was employed to simulate the homogeneous oxidation of SO in the tail gas incinerator.