Mercury is a toxic and corrosive metal that can be present in natural gas, crude oil, and other hydrocarbon streams. It can cause damage to equipment and pose a threat to workers if not removed. Therefore, it is important to remove mercury from these streams before they are used or transported. There are several methods used for mercury removal, including adsorption, chemical treatment, and membrane separation. Adsorption involves the use of a solid material, such as activated carbon or zeolite, to selectively capture mercury from the gas or liquid stream. Chemical treatment involves the use of chemicals, such as sulfur or chlorine compounds, to react with the mercury and convert it to a solid or liquid form that can be easily removed. Membrane separation involves the use of a membrane that selectively allows only certain molecules, such as mercury, to pass through.