SCOT ULTRA: staying ahead of the curve with tail gas treating

Due to ever increasing mandates to lower SO2 emissions and reducing assets margins, refiners and gas plant operators are always looking for ways to lower their operating cost of their tail gas treatment units (TGTU).



The development of the Shell SCOT ULTRA process enables plant robustness (e.g. higher resilience towards H2S fluctuations), improved profitability, e.g. reduction of the operating cost of both existing and new TGTU’s. This can be realized through:
• Application of the new C-834 SCOT catalyst (developed by Criterion Catalyst and Technologies), which allows operation at lower temperatures and

• Combination with joint developed Shell-Huntsman’s JEFFTREAT ULTRA solvent.

• The benefits of converting existing TGTU’s to the SCOT ULTRA configuration will be illustrated through a number of case studies, showing improved profitability, due to:

• reduced solvent circulation rate

• reduced energy consumption



In addition, the new JEFFTREAT ULTRA solvent is able to maintain high H2S absorption at higher temperatures with improved CO2 slip, thereby making this solution very applicable for warmer climates, where typically chilling would be required to meet solvent performance.