Clean Coal Technologies

1. Clean Coal Technologies An Overview 3 February 2010 Arnab Mitra (101532) 1

3. Treating flue gas with steam to reduce SO2, CO2 etc.

4. Improve efficiency.

6. Integrated Gasification Combined Cycle (IGCC).

9. Low Load Circulation.

12. 7 Super Critical - Spiral Wall Tubing

13. 8 Water and Steam Flow

15. Runs dry during once through mode operation.

16. Smaller in size as compared to the drum in sub critical boilers.Air and Incondensable gases Dry Steam Water + Steam Moisture

17. 10 Super Critical - Sliding Pressure Operation

18. 11 Super Critical - Plant Cycle

19. 12 Thermal Efficiency Improvements % ɳ 4.5 600 / 600OC 3.3 566 / 593OC 2.3 566 / 566OC 1.5 538 / 566OC 538 / 538OC 0.7 BASE 538 / 538OC 169 246 310 Steam Pressure (kg/cm2).

20. 13 Super Critical - Improved Efficiency

21. 14 Technology Adoption Status

24. Ash production.

25. CO2

26. SO2

28. SO2 - 365 tonnes

30. Startup time is lesser.

32. Better control of Feed water quality required.

35. Removes impurities from coal gas before combustion.

36. Lower emissions of SO2, particulates and mercury.

37. Good efficiency: ~ 48 %X High prohibitive cost.

38. 19 Magneto Hydro Dynamics (MHD) Technology

39. 20 Magneto Hydro Dynamics (MHD) - Open Cycle

40. 21 Magneto Hydro Dynamics (MHD) - Generator

41. 22 Magneto Hydro Dynamics (MHD) - Brayton Cycle

43. Hot Exhausts can be used in a combined cycle (ɳ ~ 60 %).

44. Power α Velocity2.