1. Mass and Energy Balance of Glycerol Reformer and Cost estimation Mahbuba Ara 10-09-07

2. Reactions In The Reformer C 3 H 8 O 3 3CO + 4H 2 CO + 3H 2 O CO 2 + 7H 2 Overall reaction: C 3 H 8 O 3 + 3H 2 O 3CO + 7H 2 AND CO + 3H 2 CH 4 + H 2 O H2OH2OH2OH2O

3. Material Balance of Reformer 2% C 3 H 8 O 3 18% H 2 O 80% He 600°C 67.9% H 2 28.8% CO 2 2.90% CO 0.4% CH 4 Dry Basis, T = 125°C vol%

4. Basis, Conversion, Selectivity Basis, 100 mol/h feed. 100 mol/h feed. Conversion : 100% Selectivity : 75% where, selectivity = X X 100 Steam to Carbon molar ratio: 9:1 Moles H 2 produced C atoms in gas phase 1 RR which depends where RR is the H 2 /CO 2 reforming ratio which depends on the reactant compound.

5. Calculation of Enthalpy Enthalpy of Glycerol: Where

6. Material and Energy Balance Substance n in mol/h H in KJ/mol n out mol/h H out KJ/mol C3H8O3 C3H8O3 C3H8O3 C3H8O3 2 -582.3 0 0 H2OH2OH2OH2O 18-237.5 13.4-180.4 He He 80 2.08 80 11.96 H2H2H2H2 0 0 4.5 25.84 CO2 0 0 1.91 -367.4 CO CO 0 0 0.192 -93.01 CH 4 0 0 0.026 -46.15 Q = ∑ n out H out - ∑ n in H in = 3162.7 KJ/h = 0.88 kW

7. Reactions in SOFC For H 2 fuel: Anode: 2H 2 + 2O -2 -> 2H 2 O + 4e - Cathode: O 2 + 4e - -> 2O -2 For CO fuel: Anode: 2CO + 2O -2 -> 2CO 2 + 4e - Cathode: O 2 + 4e - -> 2O -2

8. To Determine The Voltage of SOFC E =E 0 + (RT/2F)ln(P O2 0.5.P H2 /P H2O ), for one mole of H 2 E =E 0 + (RT/2F)ln(P O2 0.5.P co /P CO2 ), for one mole of CO E 0 = -Δg f 0 /2F Where, Δg f 0 is molar Gibbs free energy change at std. pressure. And F = Faraday constant = 96,485 coulombs Efficiency, η = μ f 100% μ f = Vc 1.48 Mass of fuel reacted in cell Mass of fuel input to cell

9. Future work Determine voltage and power of SOFC Determine voltage and power of SOFC Cost estimation Cost estimation