Mass and Energy Balance of Glycerol Reformer and Cost estimation Mahbuba Ara

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

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

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.

Calculation of Enthalpy Enthalpy of Glycerol: Where

Material and Energy Balance Substance n in mol/h H in KJ/mol n out mol/h H out KJ/mol C3H8O3 C3H8O3 C3H8O3 C3H8O H2OH2OH2OH2O He He H2H2H2H CO CO CO CH Q = ∑ n out H out - ∑ n in H in = KJ/h = 0.88 kW

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

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

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