What is the primary function of amine in refinery processes?

The primary function of amine in refinery processes is to remove hydrogen sulfide (H2S) from gas streams. Amines are widely used in gas treatment processes for their ability to selectively absorb H2S and carbon dioxide (CO2) from various hydrocarbon streams. This is particularly important because H2S is a toxic and corrosive compound that can pose safety hazards and damage equipment within the refinery. By effectively removing H2S, amines help ensure that the hydrogen streams are purified before they are used in various refining processes, enhancing both safety and operational efficiency.

While enhancing fuel quality and increasing reactor efficiency are important aspects of refinery operations, they are not the primary purpose of amines. Similarly, regulating vapors in distillation does not directly relate to the main role of amines in gas treatment. Thus, the use of amines is specifically tailored to address the removal of acidic gases such as H2S, making this the correct choice.