The Naphtha Hydrotreater (NHT) Unit removes sulfur, nitrogen, oxygen, and metal impurities from naphtha using hydrogen under high temperature and pressure. This process:✔ Protects the catalyst in the reformer unit (since ...
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🔹 Causes of catalyst deactivation:✔ Coking – Formation of carbon deposits.✔ Metals Deposition – Vanadium & nickel accumulation.✔
✔ Cobalt-Molybdenum (Co-Mo) on Alumina – Used for low-sulfur feeds.✔ Nickel-Molybdenum (Ni-Mo) on Alumina – More active, used for high-sulfur feeds.
🔹 Reactor temperature is controlled by:✔ Preheater adjustments – Regulates feed temperature.✔ Quench Hydrogen Injection – Reduces excessive heat in exothermic reactions.✔ Reactor Bed Temperature ...
🔹 The stripper column removes:✔ H₂S & NH₃ – Prevents poisoning of downstream catalysts.✔ Light hydrocarbons – Improves product stability
🔹 The hydrogen recycle system:✔ Reuses excess hydrogen gas after separating it from reaction products.✔ Uses a recycle gas compressor to send hydrogen back to the reactor.
✔ Heat Exchangers – Used for feed preheating.✔ Hydrotreater Reactor – Contains catalyst for desulfurization.✔ Hot Separator & Cold Separator – Separate gases from liquids.✔ ...
