	US 12,098,882 B2
	Heavy hydrocarbon and BTEX removal from pipeline gas to LNG liquefaction
John Mak, Aliso Viejo, CA (US); Jacob Thomas, Sugar Land, TX (US); and David Schulte, Aliso Viejo, CA (US)
Assigned to Fluor Technologies Corporation, Irving, TX (US)
Filed by Fluor Technologies Corporation, Sugar Land, TX (US)
Filed on Dec. 13, 2018, as Appl. No. 16/219,126.
Prior Publication US 2020/0191477 A1, Jun. 18, 2020
Int. Cl. F25J 3/00 (2006.01); F25J 1/00 (2006.01); C10L 3/10 (2006.01); F25J 1/02 (2006.01); F25J 3/02 (2006.01); F25J 3/06 (2006.01)

CPC F25J 1/0022 (2013.01) [C10L 3/101 (2013.01); C10L 2290/06 (2013.01); C10L 2290/10 (2013.01); C10L 2290/12 (2013.01); C10L 2290/48 (2013.01); C10L 2290/542 (2013.01); C10L 2290/545 (2013.01); F25J 1/0238 (2013.01); F25J 3/0209 (2013.01); F25J 3/0233 (2013.01); F25J 3/0247 (2013.01); F25J 3/061 (2013.01); F25J 2200/40 (2013.01); F25J 2205/40 (2013.01); F25J 2205/66 (2013.01); F25J 2210/06 (2013.01); F25J 2210/62 (2013.01); F25J 2220/64 (2013.01); F25J 2230/30 (2013.01); F25J 2245/02 (2013.01); F25J 2245/90 (2013.01)]

20 Claims

1. A method for removing heavy hydrocarbons from a feed gas, the method comprising:

feeding, into an absorber, a top reflux stream and a second reflux stream below the top reflux stream, wherein the absorber produces an absorber bottom product stream and an absorber overhead product stream;

depressurizing and feeding the absorber bottom product stream to a stripper to produce a stripper bottom product stream and a stripper overhead product stream;

cooling and feeding a portion of the absorber overhead product stream back to the absorber as the top reflux stream;

pressurizing and feeding the stripper overhead stream back to the absorber as the second reflux stream, wherein the second reflux stream comprises greater than 70 mole percent methane;

cooling and separating an inlet gas to produce a feed gas and a feed liquid;

feeding the feed liquid to the stripper; and

expanding and feeding the feed gas to a lower portion of the absorber.