Highly efficient methane separation for rng-lng and co2 conversion

A methane purification system comprising:

• one or more components that cool and compress an input methane-containing gaseous mixture stream to form a first methane-containing gaseous mixture stream;
• a filter-separator in fluid communication with the one or more components that receives the first methane-containing gaseous mixture stream removing water therefrom to form a second methane-containing gaseous mixture stream;
• an activated carbon station that receives the second methane-containing gaseous mixture stream removing hydrogen sulfide therefrom to form a third methane-containing gaseous mixture stream;
• a methanol scrubber that receives the third methane-containing gaseous mixture stream or an expanded stream therefrom, removing carbon dioxide to form a fourth methane-containing gaseous mixture stream;
• and
• a final stage separator that produces a purified methane stream from the fourth methane-containing gaseous mixture stream or an expanded stream therefrom;
• and
• a dielectric barrier discharge reactor configured to produce ethanol from CO2.