What process is utilized to remove H2S from refinery fuel gas streams?

The process used to remove hydrogen sulfide (H2S) from refinery fuel gas streams is amine treatment. This method is widely employed in refineries due to its effectiveness in selectively absorbing acidic gases, such as H2S and carbon dioxide (CO2), from gas mixtures.

During amine treatment, the fuel gas stream is contacted with a solution of amines, which can effectively capture H2S through a chemical reaction. The solution is then regenerated in a separate unit, allowing the H2S to be released for safe disposal, while the treated gas can be sent for further processing or use.

Amine treatment is crucial for improving the quality of fuel gas and meeting environmental regulations, as H2S is toxic and corrosive, potentially damaging equipment and posing health risks. Other methods, such as hydrotreating, are more focused on removing sulfur compounds from liquid fuels rather than gas streams, making amine treatment the appropriate choice for this specific application.