1. SOFC PFD

2. Fuel Preparation

3. 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

4. Fuel Humidifier (FH-102) 1.25 Kmol H 2 0 per Kmol CH 4 fed to FH-102 Heat provided from combustor exhaust

5. Fuel Preheater (HX-103) Heat provided from fuel cell exhaust

6. Reformer (R-104) Equilibrium determined to be: –85% CH 4 → CO –15% CH 4 → CO 2 CH 4 + H 2 O → CO + 3H 2 CH 4 + 2H 2 O → CO 2 + 4H 2 Heat provided from reaction in combustor

7. Combustor (COMB -105) Extent of reaction for combustion assumed to be 100% CH 4 + 2O 2 → CO 2 + 2H 2 O Necessary O 2 provided from fuel cell air exhaust

8. Air Handling and WGS 226

9. Cathode Recuperator (HX-221) Heat provided by combustor exhaust

10. Water Gas Shift (WGS-222) CO + H 2 O → CO 2 + H 2 Equilibrium determined to be:

11. Air Preheater (HX-223) Heat provided by water gas shift exhaust

12. Air Compressor (COMP-224) Air intake for the system 6.65 standard cubic meters per minute flow

13. Solid Oxide Fuel Cell

14. Solid Oxide Fuel Cell (FC-331)

15. Post Processing

16. Water Purifier (WP-441)

17. Pressure Swing Absorber (PSA-442)

18. Anode Condenser (HX-443)

19. Water Pump (P-444)

20. PSA Compressor (COMP-445)

21. Chiller (Ref -446)

22. Hydrogen Compressor (COMP-447)