The key reactions in the NHT unit are:✔ Hydrodesulfurization (HDS) R−S+H2→R−H+H2SR-S + H₂ → R-H + H₂SR−
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Sulfur removal is critical because:✔ Protects reformer catalyst – Sulfur poisons the Pt-based catalyst in catalytic reforming.✔ Reduces SO₂ emissions – Prevents air ...
🔹 The operating conditions vary based on feed composition, but generally:✔ Temperature: 280–400°C (536–752°F)✔ Pressure: 30–60 bar (450–900 ...
Step-by-step process flow:1️⃣ Feed Preheating – Raw naphtha is heated using heat exchangers.2️⃣ Mixing with Hydrogen – Hydrogen is added to the feed.3️⃣
✔ Heat Exchangers – Used for feed preheating.✔ Hydrotreater Reactor – Contains catalyst for desulfurization.✔ Hot Separator & Cold Separator – Separate gases from liquids.✔ ...
🔹 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.
🔹 The stripper column removes:✔ H₂S & NH₃ – Prevents poisoning of downstream catalysts.✔ Light hydrocarbons – Improves product stability
