C2-C3 Plant, Dahej, ONGC

1. C2-C3 Plant, Dahej, ONGC World’s First LNG Processing Plant for Extraction of VAP

2. Introduction Process Overview Feed and Product Specifications Product Storage Facilities Unique Features of the Plant Effluents Achievements Conclusion Index

3. Introduction

4. C2-C3 Extraction Plant, Dahej First LNG processing plant in the world. Feed to Plant is LNG from PLL at (-) 152 0C Products are Ethane (C2), Propane (C3) and Butane (C4). To serve as feedstock to upcoming grass root petrochemical complex (OPaL), Dahej.

5. Product Stream Integration with Downstream PRODUCT STREAM INTEGRATION WITH PETROCHEMICALS LNG C2-C3 Extraction Plant C2-C3 Petro Chemical Complex NG Polymers Hazira plant Crude Naphtha Uran plant

6. C2-C3 Plant Location KANDLA

7. C2-C3 Plant in Dahej SEZ

9. LNG Chain Feed LNG to C2-C3 Plant

10. Process Overview

11. Process Overview Lean LNG KOD Lean LNG Compressor Demethanizer Reflux Drum Reflux to Demethanizer Column Rich LNG Preheater Lean LNG to PLL Feed From PLL Lean LNG Suction KOD C2 Product Metering Section C3 Product Demethanizer OH Condensor Rich LNG De-ethanizer Depropanizer Demethanizer C4 Product

12. Coreflux- LNG Process • Cryogenic Process Developed by Toyo Engineering Corporation (TEC), Japan to achieve high C2+ recovery rate (>98%). • Advantages : • Reflux of Demethanizer top product (Methane>99%) instead of refluxing feed LNG. • Design allows column to operate at lower pressure, hence re-boiler heat duty is lower.

13. Feed and Product Details Butane 4.02 MMTPA (80%) 100 kg/cm2 -88 deg C 0.54 MMTPA (11%) 43.5 kg/cm2 5 deg C Ethane Lean LNG 0.27 MMTPA (6%) 31.3 kg/cm2 13 deg C C2-C3 Plant PLL Propane FEED RICH LNG 0.17 MMTPA(3%) 13.6 kg/cm2 35 deg C 5 MMTPA (100%) 4 kg/cm2 -152 deg C

14. Feed and Product Specifications

15. Feed Specification * Feed mixture of Rich and Lean LNG

16. Product Boundaries

17. Product Storage Facilities

18. Storage Facilities

19. Unique Features of the Plant

20. Unique features • Cold energy utilization • Custody transfer of LNG – Ultrasonic meter • Feed tray-SCHOEPENTOETER • High capacity trays (Shell-Sulzer Technology) • Flare system-Air assisted • Grass reed technology

21. Cold Energy Utilization • Cold energy from Feed LNG is utilized in De-Methaniser, De-Ethaniser, De- Propaniser condenser and in Butane cooler. • Total cold energy recovered is approx 65 MMkCal/Hr (~ 20000 ton of refrigeration)

22. Ultrasonic Flow Meter • Ultrasonic flow metering for LNG custody transfer. • 8 path transit time measurement. • High accuracy of measurement (± 0.5 %). • Non contact type.

23. Ultrasonic Flow Meter – Caldon make

24. Schoepentoeter Proprietary Shell vane type inlet device used for introducing feed in Demethanizer Column Used to decrease the momentum of the feed for better distribution and low pressure drop CFD Diagram showing the flow distribution Diagram of a Schoepentoeter

25. High Capacity Trays In De-methanizer column Lumas-Sulzer patented Calming section plus & Hi-fi plus trays are used • Enhanced liquid handling capacity by up to 20%. • Maximizes the Jet Flood Capacity and minimizes entrainment. • Optimal value engineering concepts- thus ensuring minimal cost

26. Effluents

27. Flare System Air assisted flare for • Low flame temperature. • Smokeless flare • Increased flare tip life • Reduced noise • Thus precious water (drought affected area) is not wasted

29. Schematic of Grass Reed Plot Reduction of COD using grass plot

30. Eco friendly Operations • Air assisted flare system • Argonite in place of CFC • Ambient air quality monitoring system. • Zero liquid effluent discharge. • No catalyst used. • Carbon footprint reduction by use of foundation field bus

31. Achievements

32. Safety Award Safety Award for C2-C3 Plant

33. Conclusion

34. Conclusion C2-C3 Plant is an important landmark in development of LNG processing technology C2-C3 Plant holds with it a lot of promise in the field of extracting value added products from LNG

35. miles to go ……