Sulfur is naturally present as an impurity in fossil fuels. When the fuels are burned, the sulfur is released as sulfur dioxide—an air pollutant that contributes to respiratory problems for human..
Sulfur is naturally present as an impurity in fossil fuels. When the fuels are burned, the sulfur is released as sulfur dioxide—an air pollutant that contributes to respiratory problems for humans and acid rain conundrums in nature. Environmental regulations have increasingly restricted sulfur dioxide (SO2) emissions, forcing refiners to remove the sulfur from both fuels and exhaust gases.
Two significant ways in which refiners manage sulfur are via the Claus sulfur recovery process and through amine unit management programs. In the typical Claus process, the acid gas feed is partially oxidized to generate SO2, which then reacts with the remaining hydrogen sulfide (H2S) over a catalyst
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