Liquefaction of production gas

A method, comprising:

• compressing an input fluid stream comprising at least natural gas and carbon dioxide to generate a first intermediary fluid stream;
• cooling the first intermediary fluid stream with a first heat exchanger to generate a second intermediary fluid stream, wherein a temperature of the second intermediary fluid stream is higher than a carbon dioxide-freezing temperature for the second intermediary fluid stream;
• expanding the second intermediary fluid stream to generate a third intermediary fluid stream, wherein the third intermediary fluid stream is introduced directly to a separator and the third intermediary fluid stream comprises solid carbon dioxide and a pressure of the third intermediary fluid stream is lower than that of the second intermediary fluid stream;
• separating the third intermediary fluid stream in the separator to produce a fourth intermediary fluid stream and a first output fluid stream, wherein the first output fluid stream comprises a slurry of liquefied natural gas (LNG) liquid and the solid carbon dioxide, and the fourth intermediary fluid stream is a gaseous stream;
• utilizing the fourth intermediary fluid stream as a cooling fluid stream for a second heat exchanger, thereby generating a fifth intermediary fluid stream;
• wherein the fourth intermediary fluid stream is introduced directly to the second heat exchanger;
• compressing the fifth intermediary fluid stream to generate a sixth intermediary fluid stream;
• cooling the sixth intermediary fluid stream within the first heat exchanger followed by further cooling within the second heat exchanger to generate a seventh intermediary fluid stream, wherein a temperature of the seventh intermediary fluid stream is higher than a carbon dioxide-freezing temperature for the seventh intermediary fluid stream;
• expanding the seventh intermediary fluid stream to generate an eighth intermediary fluid stream, wherein the eighth intermediary fluid stream comprises solid carbon dioxide;
• separating a second output fluid stream from the eighth intermediary fluid stream, wherein the second output fluid stream comprises a second portion of LNG liquid;
• and
• combining the first output fluid stream with the second output fluid stream to form a combined output fluid stream;
• wherein the combined output fluid stream is obtained in an amount that is at least about 85% of a mass input of the input fluid stream.