Tag hydrogen analyzer

How is the sulfiding process monitored?

A controlled sulfiding procedure includes:

1. Drying the catalyst bed (200–250°F).
2. Wetting with clean straight-run feed.
3. Injecting DMDS or DTBPS at 450–500°F in hydrogen-rich atmosphere.
4. Monitoring H₂S concentration to detect catalyst activation (“breakthrough”).
5. Holding temperature (600–660°F) until sulfiding is complete.

Modern refineries use online H₂S and hydrogen analyzers to ensure precision and safety throughout the process.

How is the sulfiding process monitored?

Modern refineries use online H₂S and hydrogen analyzers to monitor sulfiding progress. The process involves:

1. Drying and wetting the catalyst bed.
2. Gradually heating the reactor while introducing the sulfiding agent.
3. Tracking H₂S concentration in the effluent gas to detect breakthrough — the point at which the catalyst becomes fully sulfided.
4. Holding at a final temperature (typically 600–660°F) until completion.