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SOFC PFD. Fuel Preparation. Desulfurizer (DS-101). 2 ppm H 2 S in natural gas feed H 2 S removed in DS-101 with disposable carbon filters 10% of CH 4 fed to combustor 90% of CH 4 fed fuel humidifier. Fuel Humidifier (FH-102). 1.25 Kmol H 2 0 per Kmol CH 4 fed to FH-102
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Desulfurizer (DS-101) • 2 ppm H2S in natural gas feed • H2S removed in DS-101 with disposable carbon filters • 10% of CH4 fed to combustor • 90% of CH4 fed fuel humidifier
Fuel Humidifier (FH-102) • 1.25 Kmol H20 per Kmol CH4 fed to FH-102 • Heat provided from combustor exhaust
Fuel Preheater (HX-103) • Heat provided from fuel cell exhaust
Reformer (R-104) • Equilibrium determined to be: • 85% CH4 → CO • 15% CH4 → CO2 • CH4 + H2O → CO + 3H2 • CH4 + 2H2O → CO2 + 4H2 • Heat provided from reaction in combustor
Combustor (COMB -105) • Extent of reaction for combustion assumed to be 100% • CH4 + 2O2 → CO2 + 2H2O • Necessary O2 provided from fuel cell air exhaust
Cathode Recuperator (HX-221) • Heat provided by combustor exhaust
Water Gas Shift (WGS-222) • CO + H2O → CO2 + H2 • Equilibrium determined to be:
Air Preheater (HX-223) • Heat provided by water gas shift exhaust
Air Compressor (COMP-224) • Air intake for the system • 6.65 standard cubic meters per minute flow