CPC F02M 33/00 (2013.01) [B01D 3/06 (2013.01); B01D 3/32 (2013.01); B01D 3/40 (2013.01); B01D 3/42 (2013.01); B01D 15/08 (2013.01); B01D 61/00 (2013.01); B01D 65/00 (2013.01); C10G 7/08 (2013.01); C10L 1/06 (2013.01); F02D 19/0649 (2013.01); F02D 19/0671 (2013.01); F02D 19/081 (2013.01); F02D 41/0025 (2013.01); F02M 31/02 (2013.01); C10G 2300/4068 (2013.01); F02D 2200/0611 (2013.01); Y02T 10/12 (2013.01); Y02T 10/30 (2013.01)] | 14 Claims |
1. A method comprising:
in a mixer, mixing a fuel stream with a solvent to form a mixed stream, the solvent having a higher affinity for a second component of the fuel stream than for a first component of the fuel stream;
in a first separator downstream from the mixer, separating the mixed stream into a first fuel fraction including the first component of the fuel stream and a mixed fraction including the second component of the fuel stream based on a difference in volatility of the first fuel fraction and the mixed fraction;
in a second separator downstream from the first separator and in fluid communication with the mixer, separating the mixed fraction into a second fuel fraction including the second component of the fuel stream and a solvent fraction;
in a heat exchanger, transferring heat from the second fuel fraction to the mixed fraction, thereby condensing the second fuel fraction and pre-heating the mixed fraction upstream of the second separator; and
recycling the solvent fraction from the second separator to the mixer to mix with the fuel stream to form the mixed stream.
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