Acid gas removal from ethane gas by amine absorption is a well known industrial process and is still considered a state of the art technology (Li et al., 2013 and Lin et al., 2012). The reactivity and availability of alkanol amines at low cost especially monoethanolamine (MEA), and diethanolamine (DEA), have made the solvent to achieve a pinnacle position in the gas processing industry. Aqueous solutions of the alkanol amines absorb acid gas at relatively low temperatures and release them at almost high temperatures. This process allows the separation of carbon dioxide from ethane gases. There are different reactions between amine and acid gases in different conditions. Generally in the first step, H2S reacts with amines via View the MathML source transfer, while CO2 reacts with amine in two different reactions pathways; firstly, it reacts with amine to form an acid carbonic salt and secondly, reaction occurs when the CO2 is dissolved in water and forms bicarbonate ion. The reactions are as follows