11.36 It is proposed to produce acetaldehyde by oxidation of ethanol in the gas phase. C,H,OH(g) + -0,() → CH;CHO(g) + H,O(g) the ratio of air to ethanol in the fresh feed (before it is mixed with recycle stream) is 10 to 1 by mole. The conversion of ethanol on a single pass through the reactor is 25%. The unreacted ethanol is completely separated from the reaction products and recycled. (a) What is the ratio of recycle stream to the fresh feed stream? (b) What is the composition of the outlet stream from the reactor in mass percent and mole percent?

A fuel is prepared by mixing 4 moles of argon (Ar, inert) with 12 moles of ethane (C2H6) and 6moles of propane (C3H8) and undergoes complete combustion in air according to the followingreactions:C2H6 + 7/2 O2 reacts to form 2 CO2 + 3 H2OC3H8 + 5 O2 reacts to form 3 CO2 + 4 H2OAir may be considered as 21 mol% oxygen (O2) and 79 mol% Nitrogen (N2).The average molecular mass of a mixture can be calculated as Maverage = Σ xi Mi where xi and Mi are molefraction and molecular mass of component i. Atomic masses: C = 12; O = 16; H = 1; N = 14; Ar = 40.Calculate:a. the theoretical air required to burn the fuel (in kg air per kg fuel) b. the mole fraction of CO2 on a wet basis in the flue gas if the fuel is burned with 30% excess air,assuming complete combustion