No hydrocarbon vapors are allowed to vent into atmosphere. Naphtha condensation system is installed as a part of pre-reformer system. It consists of an air-cooled heat exchanger, separator and two naphtha pumps. All vents are routed through the naphtha condensing system. All hydrocarbons vapor are condensed and collected in separator before routed to flare system.
Separated naphtha is recycled back to deaerator.
The sulphur absorber catalyst volume of 19.3 m3 is provided for 2 to 3 years of catalyst life with 100 ppm sulphur present in the feed stream. High sulphur in feed naphtha is one of the main constraint. Higher sulphur in feed naphtha will require faster replacement of catalyst in sulphur absorber. Higher aromatics slip will damage the primary reformer catalyst and will increase the pressure drop in primary reformer. Pre-reformer system trips during power failure.