Methods and systems for separating olefins

A method for separating one or more olefins comprising:

• compressing a fluid comprising one or more C1-C20 hydrocarbons, water, one or more acid gases, and hydrogen;
• scrubbing at least a portion of the compressed fluid to remove at least a portion of the one or more acid gases;
• separating at least a portion of the water from the compressed fluid to provide a dehydrated fluid containing less than 0.5 mol % water, wherein the dehydrated fluid comprises the one or more C1-C20 hydrocarbons;
• separating at least a portion of one or more C4 and heavier hydrocarbons from the dehydrated fluid to provide a hydrocarbon comprising one or more C1-C3 hydrocarbons;
• separating at least a portion of one or more C3 hydrocarbons from the hydrocarbon comprising one or more C1-C3 hydrocarbons to provide a first hydrocarbon mixture comprising ethane, ethylene, acetylene, and methane;
• hydrogenating at least a portion of the first hydrocarbon mixture to convert at least a portion of the acetylene to ethane and ethylene;
• separating at least a portion of the methane from the hydrogenated mixture to provide a second hydrocarbon mixture comprising ethane and ethylene;
• and
• separating at least a portion of the ethylene from the second hydrocarbon mixture to provide a first product comprising at least 95 mol % ethylene and a second product comprising at least 95 mol % ethane, wherein the ethylene is separated from the second hydrocarbon mixture at a pressure of about 360 kPa to about 4,000 kPa.

A system for producing one or more olefins comprising:

• one or more first separators for separating at least a portion of one or more C3 and heavier hydrocarbons from a hydrocarbon comprising C1 to C20 hydrocarbons to provide a first hydrocarbon mixture comprising ethane, ethylene, and acetylene;
• one or more hydrogenators for hydrogenating at least a portion of the first hydrocarbon mixture to convert at least a portion of the acetylene to ethane and ethylene;
• one or more second separators for separating at least a portion of the methane from the hydrogenated mixture to provide a second hydrocarbon mixture comprising ethane and ethylene;
• and
• one or more third separators for separating at least a portion of the ethylene from the second hydrocarbon mixture at a pressure of about 360 kPa to about 4,000 kPa to provide a first product comprising at least 95 mol % ethylene and a second product comprising at least 95 mol % ethane.