The quench car then takes the hot coke to the quenching station where the coke is quenched with 7,000 gallons of water. Tar is the first by-product recovered in the train, by condensing out as the gas is cooled. The condensed tars and coal moisture are transported to the tar decanters, where the heavier tars are separated out and the water is recycled to cool the gas in the collecting main and primary coolers. The gas then passes through a massive compressor, called the exhauster, which pulls the gas from the ovens and pushes it through the rest of the by-product train. Tar mists are removed in electrostatic precipitators and pumped to the decanters.
Ammonia is removed in the absorber and processed into a liquid fertilizer.
The secondary cooler cools the gas to its final temperature and removes naphthalene, which is dissolved in the tar and sold. The cleaned and cooled gas then passes to the LBA's, where benzene, toluene, xylene, and higher aromatics are scrubbed from the gas and sold as light oil. All tar tanks, the light oil tank, and two weak liquor tanks were replaced. All other vessels in the plant were upgraded to meet these standards. A secondary cooler system was built to replace the final cooler system and the ammonia stills were upgraded to handle the additional liquor that was generated.