Engineering innovation for energy & environment

Large-Scale H₂S Emission Reduction System Successfully Delivered for ONGC Limited, Uran, Maharashtra, India

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EIPL successfully implemented an Enhanced Reactive Thermal Oxidation system to eliminate hydrogen sulfide (H₂S) emissions, achieving a reduction of 2000 tons per year.

EIPL is proud to have delivered a major environmental control project for one of the world’s leading oil & gas companies, ranked among the top corporations globally.

The project focused on the elimination of hydrogen sulfide (H₂S) emissions through an Enhanced Reactive Thermal Oxidation system, designed to safely and efficiently treat large volumes of hazardous waste gases.

With a processing capacity of 400,000 kg/day, the system ensures reliable destruction of toxic components while maintaining compliance with stringent environmental norms.

The process configuration includes a high-performance heat exchanger, followed by quenching, scrubbing, and final discharge through a stack, ensuring complete treatment of flue gases.

This installation represents a significant step toward reducing environmental impact and improving air quality, while supporting sustainable industrial operations.

Key Highlights

Client Profile:
  • Among top global corporations (Fortune Global 500 ranking) 
  • India’s largest oil & gas exploration and production company
  • Contributes ~77% of India’s crude oil and ~62% of natural gas production
Environmental Impact: 
  • Elimination of ~2000 tons/year of H₂S emissions
Capacity:
  • Treatment of 400,000 kg/day of waste gases 
Project Timeline:
  • Enhanced Reactive Thermal Oxidizer
  • Multi-stage treatment:
    • Heat Exchanger → Quench → Scrubber → Stack
Project Execution:
  • Awarded: August 2016
  • Completed: September 2021

Conclusion

This project demonstrates EIPL’s capability to deliver large-scale, high-performance emission control systems, addressing critical environmental challenges in the oil & gas sector through advanced thermal and chemical treatment technologies.

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