Some examples of potential uses for the Heliodor Solutions system within a refinery include:

• Temporary treatment of off-gas from:
  - Crude Unit
  - Hydrotreater
  - Hydrocracker
  - Catalytic Cracking Unit
  - Coker
  - Platformer
  - Saturates Gas Plant

• Tail Gas Treatment Unit temporary replacement
• Vapor Recovery Systems
• Sour Water Stripper Gas
• Wastewater Treatment Plant Off-Gas
• Polishing of amine unit gas sent to third party customers for use as fuel gas

Refinery personnel choose Heliodor Solutions because we provide:

• H2S removal consistently to 0%, no matter how high the H2S levels in the raw natural gas
• Selectivity for H2S ensuring efficient chemical consumption
• Flexibility to place systems at multiple sites within the refinery
• Inexpensive, readily available capital equipment
• Quick system design and installation
• Ability to store the HS-1500 chemical solution on site for over one year without product degradation
• Nonhazardous spent solution that allows for multiple disposal options, including on-site wastewater treatment plant or nonhazardous injection wells
• Ability to filter out elemental sulfur

Refinery operators prefer Heliodor Solutions hydrogen sulfide removal systems for several reasons, including:

• Rapid changeout of spent solution for fresh HS-1500 solution, without operator contact or heavy equipment
• Predictable run times
• Effective operation in high and low pressure environments
• Effective operation across a broad range of H2S concentrations
• Process operates unattended except for chemical changeout
• Efficient operation over a wide temperature range
• Minimal pressure drop through the treatment vessel
• Systems can be designed for continuous operation