What are the two primary purposes of the Amine units?

The two primary purposes of Amine units in a refinery setup revolve around the treatment of gases that contain hydrogen sulfide (H2S). First and foremost, Amine units are designed to strip H2S from amine solutions, which is crucial for maintaining the quality and safety of the amine used in the process. This process involves the absorption of H2S from sour gas streams, which is essential for preventing corrosion and ensuring the reliability of downstream equipment.

In addition, another key function of Amine units is to remove H2S from refinery fuel gas, thereby helping to reduce the environmental impact. By effectively removing H2S from fuel gas, Amine units contribute to compliance with environmental regulations and enhance the overall quality of the gas, making it safer for use as fuel and reducing the formation of harmful emissions.

These two functions directly support the operation and safety of the refinery, making the correct answer focus on the role of Amine units in treating both the amine solution and the refinery fuel gas to mitigate H2S-related issues.