Q2 Technologies, a former subsidiary of Quaker Chemical which developed the MEA-Triazine scavengers used world-wide today, along with its Gulf Coast region distributor, Additive Direct Services have brought to market the Pro3® series of non-amine/non-triazine H2S scavengers. The Pro3® series is the next generation of scavengers replacing MEA-Triazine in liquid hydrocarbon streams. The Pro3® series is the result of a need to reduce fouling/corrosion created by amine based scavengers in refineries, production streams and crude oil terminals while improving H₂S removal performance.

CHALLENGES
  • Demurrage fees and interruptions of crude oil loading into barges and tankers at terminals are frequent when H2S levels exceed 10 ppmv.
  • High volumes of MEA-Triazine were necessary to reach the required H2S specification of <10 ppmv and scavenger injection pumps struggled to keep up with
    pipeline flowrates of up to 20,000 barrels per hour into barges and tankers at the terminal.
  • Condensate and crude treated with MEA-Triazine were observed to cause fouling and corrosion in neighboring splitters and refining units.
  • High level of H2S in some storage tanks required the terminal to have expensive independent H2S monitoring done.
SOLUTION
  • Pro3® was recommended to replace the 40% MEA-Triazine scavenger to reduce chemical treatment cost, logistics, and fouling problems in splitters and refining units.
  • A dual pump on-site injection system and chemical bulk storage with 24/7 support staff allowed for treatment of large volumes of crude oil on demand.
RESULTS
  • Pre-treatment H₂S level: 10 ppm – 800 ppm determined by ASTM D-5705 (3rd party inspection lab measurements of > 100 vessels).
  • Post-treatment H₂S level: <10 ppm
    Loaded Volumes: 30,000-650,000 barrels
  • Approximately 3 million barrels of EFL/EFR/WTI are
    treated monthly with the Pro3® series.
  • Chemical consumption was cut by 50% compared to 40% MEA-triazine resulting in:
    – Deliveries cut by 50% translating into
    increased productivity personnel.
    – $10,000 per month reduction in chemical cost.
    *Will vary on application requirements.
    – Injection system keeping up with terminal pipeline flowrates.
  • Potential demurrage fees ranging from $4,000 – $52,000 per
    day from out of specification H₂S levels were eliminated.
  • At one terminal site eleven H₂S monitoring personnel were
    eliminated, resulting in substantial monthly savings.

TAKE-AWAYS:

  • >$10k per month chemical savings.
  • Deliveries cut by 50%.

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