a brazed aluminum heat exchanger comprising a plurality of parting sheets defining a plurality of separate flow channels positioned between the plurality of parting sheets, a plurality of fin sheets positioned in the plurality of flow channels, a hot section, a separate cold section, a feed inlet of the hot section configured to receive a raw feed stream, a cooled liquids inlet of the cold section configured to receive a cooled liquids stream, a cold fuel inlet of the cold section configured to receive a cooled fuel stream, a cooled feed outlet of the cold section configured to discharge a cooled feed stream formed from the raw feed stream, a fuel outlet configured to discharge a finished fuel gas stream, and a liquids outlet configured to discharge a finished liquids stream;

an expansion valve coupled to the heat exchanger and configured to receive the cooled feed stream from the heat exchanger and discharge an expanded feed stream formed from the cooled feed stream; and

a feed separator, comprising:

an inlet coupled to the expansion valve and configured to receive the expanded feed stream;

an interior configured to separate the expanded feed stream into the cooled fuel stream and the cooled liquids stream;

a fuel outlet configured to discharge the cooled fuel stream such that the cooled fuel stream is received by a hot fuel inlet of the heat exchanger; and

a cooled liquids outlet configured to discharge the cooled liquids stream such that the cooled liquids stream is received by the cooled liquids inlet of the heat exchanger;

wherein the heat exchanger is configured to transfer heat between the raw feed stream and both the cooled liquids stream and the cooled fuel stream across the hot section and the cold section of the heat exchanger, to form the finished fuel gas stream from the cooled fuel stream received by the hot fuel inlet of the heat exchanger, and to form the finished liquids stream from the cooled liquids stream received by the cooled liquids inlet of the heat exchanger.