Question

I need to know how i can solve it. Plz explain,,

x-moles of methanol and y moles of air are supplied to a direct methanol fuel cell (DMFC) generating a current of i amps at a voltage V (volts). (a) write expressions for the output mass flux (molls) of methanol (v_MeOH, out), air (v_ air, out), water (v_H_2O, out), and carbon dioxide(v_CO_2, out) using the given variables. (b) Write expressions for the stoichiometric factors for methanol (lambda_MeOH) and air (lambda_air) using the given variables. (Clearly indicate numeric values for n in all cases.)

Answer 1

"MCOH + air rightarrow CO_2 (2) + 2H_2O + MCOH air = 3.4776 moles air (79 g N_2 & u^2 Q_2) = 2.32 moles N_2 + 0.686moles O_2 implies moles air = 0.188 70 gm moles 62 1 mole MCOH requi + mole O_2 for complete confussion to CO_2 + H_2O & Energy If only some fraction say 'P' is consumed then, P delta H rea amount ero ie x moles is input/sec x (P delta H_rea) = VI Output flux V = (1 - p) x and u/sec V_H_2O = (1 - p) times 2x and moles/sec V_CO_2 = (1 - p) moles/sec V_air = (y - 3/2 x) moles/sec Px moles of MCOh consume (3/2 px)/0/117 V_air = (y - 3/2 px) (b) MCOH