28-06-2012, 12:07 PM
IGCC - Clean Coal Technology Conference
IGCC.ppt (Size: 8.15 MB / Downloads: 220)
Features of IGCC Technology
1. SOx , NOx and Particles:
SOx , NOx and particulate emissions are comparable to or less
than those obtained in a combined cycle using Natural Gas
(NGCC).
2. Greenhouse effect gas CO2 :
CO2 emission is reduced by 20% in IGCC over conventional
boiler base power plant.
CO in syngas can be converted to CO2 and production of Hydrogen can
be increased. Thus CO2 can be captured directly using regular
commercial process at a higher pressure than extracting it from combustion gases
from conventional PC plant or NGCC plant.
3. Water consumption:
Specific consumption of water for the operation of IGCC plant is approx. half that of
conventional plant using gas cleaning system.
4. Other contaminants : Chlorine , Mercury, Heavy metals:
In IGCC operation,
Chlorine compounds are extracted from Gas by washing with water.
Heavy metals are almost entirely captured in the slag which is a vitrified, non
leachable, inert solid.
Mercury can be removed by absorption on a bed of active carbon for IGCC at a cost
of 1/12 that of PC power plant.
5. Solid by products:
Sulphur is recovered in a pure elemental state or as sulphuric acid.
Solid waste (slag) can be disposed as by products for manufacturing of ceramic
material, fiber glass, filling roads, manufacturing of cements, roof tiles or bricks.
Background Story of Petcoke Usage
First Refinery at Jamnagar started up in Q4’99. Petcoke production ~ 8500 TPD
During project engineering phase several options for petcoke usage were discussed:
Thermal power plant – CFBC Boiler + STG
Petcoke gasification to generate H2 for refinery. Back up of coal feed during start up
Storage of petcoke during intervening period between start up of refinery and proposed units above
Focused effort for marketing of petcoke – National + International Customers
Marketing efforts were so successful, that we didn’t pursue any of the other options.