The Key to Efficient Sulfiding in Refinery Operations
In modern refining operations, maintaining optimal catalyst performance in hydrotreating and hydrocracking units is crucial. Among the many chemical tools available, Tertiary Butyl Polysulfide (TBPS) and Di-tert-Butyl Polysulfide (DTBPS) stand out as highly effective sulfiding agents, ensuring catalysts achieve full activity quickly and reliably.
What Are TBPS and DTBPS?
TBPS and DTBPS are organosulfur compounds specially formulated to introduce sulfur into refinery catalysts. They are liquid sulfiding agents designed for use in hydrotreating (HDT) and hydrocracking (HYC) processes, where rapid and controlled sulfiding is critical for:
- Activating fresh catalysts
- Maintaining catalyst activity during operation
- Minimizing downtime during catalyst replacement
Both TBPS and DTBPS are highly soluble in refinery feedstocks, providing uniform sulfur distribution and minimizing risk of localized over-sulfiding.
Why Choose TBPS and DTBPS?
Refinery operators prefer TBPS and DTBPS for several reasons:
- Fast and Efficient Sulfiding
These agents rapidly convert metal oxides in catalysts to their sulfide form, ensuring immediate catalyst activity upon start-up.
- Enhanced Safety
Compared to elemental sulfur or H₂S gas, TBPS/DTBPS are easier to handle, with lower risk of corrosion and toxic gas exposure.
- Optimized Catalyst Life
Proper sulfiding reduces catalyst deactivation, extending operational life and improving overall process efficiency.
- Flexible Application
Suitable for all types of hydrotreating and hydrocracking catalysts, TBPS and DTBPS are compatible with diverse refinery feedstocks.
Typical Applications in Refineries
- Hydrotreating Units: Sulfiding fresh Co-Mo or Ni-Mo catalysts before hydrogenation of sulfur-containing feedstocks.
- Hydrocracking Units: Ensuring proper sulfiding of Ni-W or Ni-Mo catalysts to maximize conversion and selectivity.
- Startup & Maintenance: TBPS/DTBPS can be used during catalyst replacement, regeneration, or maintenance cycles.
Handling and Storage
To maximize safety and efficacy:
- Store in cool, dry areas away from direct sunlight.
- Use compatible materials for tanks and transfer lines to avoid corrosion.
- Follow standard personal protective equipment (PPE) guidelines during handling.
Conclusion
For refinery operators seeking reliable and efficient sulfiding solutions, TBPS and DTBPS provide the ultimate combination of safety, speed, and performance. Their ability to activate catalysts rapidly and maintain operational stability makes them essential chemicals in modern hydrotreating and hydrocracking operations.