INTERGRATED GASIFICATION COMBINED CYCLE (IGCC) ANH PHUONG NGUYEN APN Nov 2008 CHE 384 ENERGY TECHNOLOGY & POLICY

Content  Overview  IGCC Process  Future development  Conclusions

Overview COMBINED CYCLE GASIFICATION PRODUCE SYNGAS INTEGRATED GASIFICATION COMBINED CYCLE POWER GENERATION LOW EMISSIONHIGH EFFICIENCY

IGCC Plants in the US The Tampa Electric IGCC Project Mulberry, Florida, 1996 Using: GE Energy Gasification Output: 250 MWe The Wabash River IGCC Project West Terre Haute, Indiana, 1995 Using: The ConocoPhillips E-Gas Gasification process Output: 262 MWe

IGCC PROCESS

GASIFIER TYPES ManufacturerGasifier typeApplication ConocoPhillipsCoal- water slurry feed, Oxygen blown, refractory lined gasifier wide range of coal General Electric Energy (GE) Coal-water slurry feed, O 2 blown, refractory lined gasifier bituminous coal, pet- coke or blend of pet coke with low rank coal Kellog Brown and Root (KBR) dry feed, air blown transport reactor low rank coal Mitsubishi Heavy Industry (MHI) dry feed, air blownlow rank coal Shelldry feed, coal is crushed, dried and fed into gasifier, oxygen blown, waterwall in gasifier wide variety of feedstock

Kellog Brown and Root (KBR)

COMPARISON IGCC (ConocoPhilips) PC subcriticalPC supercriticalNGCC CO 2 capture NoYesNoYesNoYesNoYes Net power output (kW e ) 623,370518,240550,445549,613550,150545,995560,360481,890 HHV efficiency (%) 39.3%31.7%36.8%24.9%39.1%27.2%50.8%43.7% Levelized cost of electricity ($/MWh) Total plant cost (Million $)

IGCC COST BREAKDOWN UnitCost ($) Coal & sorbent handling34,000 Coal & sorbent preparation and feed52,665 Feed water system34,944 Gasifier system total - Gasifier, syngas cooler & auxiliaries - Air Separation Unit & O 2 compression - Other gasifier units 446, , ,449 62,795 Gas cleanup and piping228,370 CO 2 removal system35,754 Combustion turbine123,611 Steam turbine56,611 Cooling water system24,614 Aspen, sorbent handling system35,031 Accessory electric plant73,409 Instrumentation & control25,021 Building and structure16,429 Total1,259,800

FUTURE DEVELOPMENT  Improve gasifier performance  Improve gas turbine efficiency  Improve the heat exchanger system  Reducing cost of air separation unit or switch to air blown process as Japan did  Optimize energy saving in IGCC  Improve control of the integrated system

CONCLUSION  Promising technology in early development  Substitute for current coal fired power plant  Need more R&D to make it more competitive  Prospect of zero emission from coal

Q&A